2012 FSAE Structural Equivalency Spreadsheet V1.0.13

2012 FSAE Structural Equivalency Spreadsheet Guidance Notes

The SES template has been created to simplify the process of proving structural equivalency.As downloaded the spreadsheet assumes a baseline steel chassis design. The majority of the cells in the spreadsheet are locked, you can only edit the cells shaded yellow. Cells shaded grey are dependant on the data entered in yellow cells, the formulae in these grey cells have been left visible so you can see how the results are calculated.

If you find a new problem with the SES template or require a clarification 72 hours or less before the SES submission deadline please include your own proof of equivalency in the "Additional Info" tab as well as filing a Rules question.

Revisions:V1.0.1 Updated baseline tubes in calculation tabs to select and compare to alternatives listed in B3.3.1 where appropriate. This stops rules legal tube selections that have marginally lower strength or stiffness from being reported as not equivalent.V1.0.2 Cell "C50" on "B3.28 Laminate Test" tab unwrite-protected.V1.0.3 Tabs where picture are to be pasted were unwrite-protected.V1.0.4 2012-Jan-02 Steel renamed for clarity. Unprotected region of welded tube tab made available for images and supporting calculations to be pasted.V1.0.5 2012-Jan-07 Data entry cells unlocked on B3.38 tab

V1.0.6 2012-Jan-14Laminate test tab updated so rig compliance adjusts the calculated skin stiffness, removed the ability to have negative rig compliance.Option to have 0 front hoop attachments for fully laminated front hoops added.Skin thickness cell unlocked in main hoop, front hoop and hoop bracing attachment tabs to allow for local reinforcement.

V1.0.7 2012-Jan-23 Revised coversheet reference from website to read_me tab.

V1.0.8 2012-Jan-23Corrected tube area calculation to include square tubes in main hoop bracing support, front hoop bracing, front bulkhead and shoulder harness bar tabsCorrected calculation of youngs modulus in laminate test tab to include subtraction of x1 value from x2

V1.0.9 2012-Jan-24Added three extra "Other materials" in MaterialData tab for greater flexbility for monocoque chassis with multiple layup typesAdded tube shape to "Welded tube insert" tabCorrected conditional formatting error in cell F32 of FBHS and Side-impact tabs

V1.0.10 2012-Jan-27 Corrected minimum wall thickness error in front hoop bracing tabV1.0.11 2012-Jan-27 Corrected alternative material front bulkhead support cell error reference in cover sheet

V1.0.12 2012-Feb-11Corrected AI IA Plate tab to allow "Other Material 3" through to Other Material 6" to also be selectedRevised baseline tubes to always be round to avoid comparison of student design to a baseline square tubes improved properties

V1.0.13 2012-Mar-24

Corrected tube area error in Front Hoop Bracing, Front Bulkhead, Main Hoop Bracing and Shoulder Harness BarCorrected baseline tube OD logic in Main Roll Hoop Bracing, Front Hoop Bracing and Front Bulkhead Amended front hoop attachments tab so that when 0 attachments are selected for laminated hoops it doesn't show "fail"Disabled area equivalency when material is not steel as it is meaninglessRevised calculation of max load at mid-span in all relevant tabs to show clearer derivation for studentsCorrected baseline tube multiples in Front Hoop bracing (one per side minimum not two)Revised calculation of max deflection to correctly account for hybrid chassis designsCorrected calculation of skin UTS in Laminate test tabAdded version history tabCorrected welded inserts tab to retain full properties for original tube material and apply "as welded" to the reinforcing material only, as per B3.3.1 note 4

The vast majority of the tabs can be accessed using the hyperlinks on the cover sheet. Note there are some that cannot such as the "additional info" and "welded tube insert" tabs. If you enable macros when opening the document "Ctrl+e" will always return you to the cover sheet.

There have been a few questions about how to handle bent/two piece tubes in place of a single baseline tube. If properly triangulated then the reinforced bent/two piece tube will be stiffer and stronger than the baseline tube, so please ensure you include images of the tube(s) in the "Chassis Pics" tab for the SES assessor to review. You may add additional proof of equivalence to the "Additional Info" tab if you deem it necessary. You do not need to adjust the number of tubes in the relevant calculation tab.

The SES has been extensively tested, but if you think you have found a mistake in the document or have any questions on how to use the template please submit a question to the FSAE rules committee in the usual manner.

The SES template has been created to simplify the process of proving structural equivalency.As downloaded the spreadsheet assumes a baseline steel chassis design. The majority of the cells in the spreadsheet are locked, you can only edit the cells shaded yellow. Cells shaded grey are dependant on the data entered in yellow cells, the formulae in these grey cells have been left visible so you can see how the results are calculated.


Updated baseline tubes in calculation tabs to select and compare to alternatives listed in B3.3.1 where appropriate. This stops rules legal tube selections that have marginally lower strength or stiffness from being reported as not equivalent.

Steel renamed for clarity. Unprotected region of welded tube tab made available for images and supporting calculations to be pasted.

Laminate test tab updated so rig compliance adjusts the calculated skin stiffness, removed the ability to have negative rig compliance.

Skin thickness cell unlocked in main hoop, front hoop and hoop bracing attachment tabs to allow for local reinforcement.

Corrected tube area calculation to include square tubes in main hoop bracing support, front hoop bracing, front bulkhead and shoulder harness bar tabsCorrected calculation of youngs modulus in laminate test tab to include subtraction of x1 value from x2Added three extra "Other materials" in MaterialData tab for greater flexbility for monocoque chassis with multiple layup types

Corrected conditional formatting error in cell F32 of FBHS and Side-impact tabs

Corrected alternative material front bulkhead support cell error reference in cover sheetCorrected AI IA Plate tab to allow "Other Material 3" through to Other Material 6" to also be selectedRevised baseline tubes to always be round to avoid comparison of student design to a baseline square tubes improved propertiesCorrected tube area error in Front Hoop Bracing, Front Bulkhead, Main Hoop Bracing and Shoulder Harness BarCorrected baseline tube OD logic in Main Roll Hoop Bracing, Front Hoop Bracing and Front Bulkhead Amended front hoop attachments tab so that when 0 attachments are selected for laminated hoops it doesn't show "fail"

Revised calculation of max load at mid-span in all relevant tabs to show clearer derivation for studentsCorrected baseline tube multiples in Front Hoop bracing (one per side minimum not two)Revised calculation of max deflection to correctly account for hybrid chassis designs

Corrected welded inserts tab to retain full properties for original tube material and apply "as welded" to the reinforcing material only, as per B3.3.1 note 4

The vast majority of the tabs can be accessed using the hyperlinks on the cover sheet. Note there are some that cannot such as the "additional info" and "welded tube insert" tabs. If you enable macros when opening the document "Ctrl+e" will always return you to the cover sheet.

There have been a few questions about how to handle bent/two piece tubes in place of a single baseline tube. If properly triangulated then the reinforced bent/two piece tube will be stiffer and stronger than the baseline tube, so please ensure you include images of the tube(s) in the "Chassis Pics" tab for the SES assessor to review. You may add additional proof of equivalence to the "Additional Info" tab if you deem it necessary. You do not need to adjust the number of tubes in the relevant calculation tab.

The SES has been extensively tested, but if you think you have found a mistake in the document or have any questions on how to use the template please submit a question to the


Updated baseline tubes in calculation tabs to select and compare to alternatives listed in B3.3.1 where appropriate. This stops rules legal tube selections that have marginally lower strength or stiffness from being reported as not equivalent.

If you have to resubmit your SES then please update the table below, indicating what changes you have made from the previous submission.

Submission VersionOriginal Submission

If you have to resubmit your SES then please update the table below, indicating what changes you have made from the previous submission.

Revision CommentsNA

University Name Car No.(s) & Event(s)Team Contact Email AddressFaculty Advisor Email Address

Is proof of equivalency for your design required for any of the rules?No. Chassis does not deviate from baseline requirements

Rule No. Rule Description

YES NO B3.10YES NO B3.11YES NO B3.12YES NO B3.12.6YES NO B3.13YES NO B3.18YES NO B3.19YES NO B3.24YES NO B5.4.1N/A N/A B3.34N/A N/A B3.29N/A N/A B3.30N/A N/A B3.31N/A N/A B3.34N/A N/A B3.32N/A N/A B3.33N/A N/A B3.34N/A N/A B3.35YES NO B3.20.6N/A N/A B3.38N/A N/A HV protection (Electric Vehicles only)N/A N/A Accumulator Support (Electric Vehicles only)

Attachment Checklist (make sure all are included in your report)P Receipt, letter of donation or proof for non-steel materials (composite, honeycomb, resin, etc)P Properties for all non-steel materialsP Monocoque Laminate Test data and picturesP Holes >4mm drilled in any regulated tubing require proof of equivalency, include area and moment of inertia

COMPLETE APPROPRIATE TABS TO PROVE EQUIVALENCY

TECHNICAL COMMITTEE DECISION/COMMENTS

Approved by Date

2012 FSAETM STRUCTURAL EQUIVALENCY SPREADSHEET (SES) V1.0.13 - COVER SHEET

This form must be completed and submitted by all teams no later than the date specified in the Action Deadlines on specific event website. The FSAE Technical Committee will review all submissions which deviate from the FSAETM rules and reply with a decision about the requested deviation. All requests will have a confirmation of receipt sent to the team. Structural Equivalency Spreadsheets (SES) must be submitted electronically in Microsoft Excel Format (*.xls). The submissions must be named as follows: schoolname_ses.xls using the complete school name. Please submit to the person indicated in the Action Deadlines for each event.

In the event that the FSAE Technical Committee requests additional information or calculations, teams have one week from the date of request to submit the requested information.

Baseline Material

Used

Alternative Material

Used

Design Description and/or Material Used

Main Roll Hoop TubingFront Roll Hoop TubingMain Roll Hoop Bracing TubingMain Hoop Bracing Support - Tube FramesFront Hoop Bracing - Tube FramesFront Bulkhead - Tube FramesFront Bulkhead Support - Tube FramesSide Impact Structure - Tube FramesShoulder Harness BarFront Hoop Bracing - MonocoquesFront Bulkhead - MonocoquesFront Bulkhead Support - MonocoquesSide Impact Structure - MonocoquesMain Hoop Bracing Support - MonocoquesMain Hoop Attachment - MonocoquesFront Hoop Attachment - MonocoquesHoop Bracing Attach. - MonocoquesImpact Attenuator Attachment - MonocoquesImpact Attenuator Anti-Intrusion PlateSafety Harness Attachment - Monocoques

Please see "Structural Equivalency Spreadsheet Guide" on the Read_Me tab of the SES Workbook

NOTE: THIS FORM AND THE APPROVED COPY OF THE SUBMISSION MUST BE PRESENTEDAT TECHNICAL INSPECTION AT EVERY FORMULA SAE EVENT ENTERED

Tube and Laminate Equivalency Tube 1 Tube 2 Tube 3 Composite

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NA NA NA NA NA NA NA NA NA Steel Round 25.4 2.40NA NA NA NA NA NA NA NA NA Steel Round 25.4 2.40NA NA NA NA NA NA NA NA NA Steel Round 25.4 1.60NA NA NA NA NA NA NA NA NA Steel Round 25.4 1.25NA NA NA NA NA NA NA NA NA Steel Round 25.4 1.60NA NA NA NA NA NA NA NA NA Steel Round 25.4 1.60NA NA NA NA NA NA NA NA NA Steel Round 25.4 1.25NA NA NA NA NA NA NA NA NA Steel Round 25.4 1.60NA NA NA NA NA NA NA NA NA Steel Round 25.4 2.40NA NA NA NA NA NA NA NA NANA NA NA NA NA NA NA NA NANA NA NA NA NA NA NA NA NANA NA NA NA NA NA NA NA NANA NA NA NA NA NA NA NA NANANANA

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T39

If cell is orange the front hoop is laminated in, check the students proof of equivalency.

T41

If cell is orange check the students proof of equivalency

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University Name Car No.(s) & Event(s)

2012 FSAETM STRUCTURAL EQUIVALENCY SPREADSHEET - CHASSIS PICTURES

Please attach pictures of the frame and/or monocoque in the table below for review during the SES process. Please colour code all tubes to show outer diameter and wall thickness. Three view drawings and isometric views of the structure (CAD, FEA models, etc) are acceptable. Note: The final decision about all designs will be made at technical inspection. Approval of an SES does not guarantee passing Technical Inspection.

Material Data Sheet

Material Spreadsheet Code Steel Aluminium 1 Aluminium 2 Carbon Other 1Material name Steel Aluminium Aluminium 2 ply Your Mat. 1Youngs Modulus, E 2.00E+11 7.00E+10 2.00E+00 0.00E+00 1.00E+00Yield strength, Pa 3.05E+08 1.00E+00 2.00E+00 0.00E+00 1.00E+00UTS, Pa 3.65E+08 1.00E+00 2.00E+00 0.00E+00 1.00E+00Yield strength, welded, Pa 1.80E+08 1.00E+00 2.00E+00 N/A 1.00E+00UTS welded, Pa 3.00E+08 1.00E+00 2.00E+00 N/A 1.00E+00UTS shear, Pa 2.19E+08 1.00E+00 2.00E+00 1.00E+00 1.00E+00

Steel properties based on SAE 1010 and are given in Rule B3.3.1 Note 1. Per rule B3.5 all steels are treated equally and are to use the above properties.

Tubing onlyComposite onlyTubes + composite

RoundSquare

F5

Derived from B3.28 Laminate Test Data

F6

Uses UTS value from below

F7

Derived from B3.28 Laminate Test Data

B10

Used for Impact Atennuator AI Plate Calcs Only

Other 2 Other 3 Other 4 Other 5 Other 6Your Mat. 2 Your Mat. 3 Your Mat. 4 Your Mat. 5 Your Mat. 6

2.00E+00 3.00E+00 4.00E+00 5.00E+00 6.00E+002.00E+00 3.00E+00 4.00E+00 5.00E+00 6.00E+002.00E+00 3.00E+00 4.00E+00 5.00E+00 6.00E+002.00E+00 3.00E+00 4.00E+00 5.00E+00 6.00E+002.00E+00 3.00E+00 4.00E+00 5.00E+00 6.00E+002.00E+00 3.00E+00 4.00E+00 5.00E+00 6.00E+00

Steel properties based on SAE 1010 and are given in Rule B3.3.1 Note 1. Per rule B3.5 all steels are treated equally and are to use the above properties.

Main Hoop Structural Equivalency - note, only steel may be used

Material Property Baseline Your TubeMaterial type Steel SteelTube shape Round RoundMaterial name /grade Steel SteelYoungs Modulus, E 2.00E+11 2.00E+11Yield strength, Pa 3.05E+08 3.05E+08UTS, Pa 3.65E+08 3.65E+08Yield strength, welded, Pa 1.80E+08 1.80E+08UTS welded, Pa 3.00E+08 3.00E+08

Tube OD, mm 25.4 25.4Wall, mm 2.4 2.4

Baseline Your TubeOD, m 0.0254 0.0254Wall, m 0.0024 0.0024I, m^4 1.15935E-08 1.15935E-08EI 2.32E+03 2.32E+03 100.0Area, mm^2 173.4 173.4 100.0Yield tensile strength, N 5.29E+04 5.29E+04 100.0UTS, N 6.33E+04 6.33E+04 100.0Yield tensile strength, N as welded 3.12E+04 3.12E+04 100.0UTS, N as welded 5.20E+04 5.20E+04 100.0Max load at mid span to give UTS for 1m long tube, N 1.33E+03 1.33E+03 100.0Max deflection at baseline load for 1m long tube, m 1.20E-02 1.20E-02 100.0Energy absorbed up to UTS, J 7.98E+00 7.98E+00 100.0

D14

Minimum = - 2mm for steel - 3mm for aluminium

Front Hoop Structural Equivalency


Tube OD, mm 25.4 25.4Wall, mm 2.4 2.4


D14


Main Hoop Bracing - Note: Only Steel may be used


Tube OD, mm 25.4 25.4Wall, mm 1.6 1.6


D14

Minimum = - 1.2 mm for steel - 3mm for aluminium

Main Hoop Bracing SupportsEnter construction type

Material Property Baseline Your TubeMaterial type Steel SteelTubing Type Round RoundMaterial name /grade Steel SteelYoungs Modulus, E 2.00E+11 2.00E+11Yield strength, Pa 3.05E+08 3.05E+08UTS, Pa 3.65E+08 3.65E+08Yield strength, welded, Pa 1.80E+08 1.80E+08UTS welded, Pa 3.00E+08 3.00E+08

Number of tubes 2 2Tube OD, mm 25.4 25.4Wall, mm 1.25 1.25

Thickness of panel, mmThickness of core, mmThickness of skins, mmPanel height,mm

OD, m 0.0254 0.0254Wall, m 0.00125 0.00125I, m^4 6.93E-09 6.93E-09EI 2.77E+03 2.77E+03Area, mm^2 189.7 189.7Yield tensile strength, N 5.79E+04 5.79E+04UTS, N 6.92E+04 6.92E+04Yield tensile strength, N as welded 3.41E+04 3.41E+04UTS, N as welded 5.69E+04 5.69E+04Max load at mid span to give UTS for 1m long tube, N 1.59E+03 1.59E+03Max deflection at baseline load for 1m long tube, m 1.20E-02 1.20E-02Energy absorbed up to UTS, J 9.54E+00 9.54E+00

E16


Tubing only

Your Composite Your TotalCarbon

NA2 ply

0.00E+000.00E+000.00E+00

N/AN/A

2218

2200

Tubing Only 6.93E-092.77E+03 100.0

189.7 100.05.79E+04 100.06.92E+04 100.03.41E+04 100.05.69E+04 100.01.59E+03 100.01.20E-02 100.09.54E+00 100.0

Front Hoop BracingEnter construction type





E16


Tubing only


NA2 ply

0.00E+000.00E+000.00E+00

N/AN/A

2218

2200

Tubing Only 8.51E-091.70E+03 100.0

119.6 100.03.65E+04 100.04.37E+04 100.02.15E+04 100.03.59E+04 100.09.78E+02 100.01.20E-02 100.05.86E+00 100.0

Front BulkheadEnter construction type





E16


Tubing only


NA2 ply

0.00E+000.00E+000.00E+00

N/AN/A

2218

2300

Tubing Only 8.51E-093.40E+03 100.0

239.3 100.07.30E+04 100.08.73E+04 100.04.31E+04 100.07.18E+04 100.01.96E+03 100.01.20E-02 100.01.17E+01 100.0

Front Bulkhead Support StructureEnter construction type Tubing only

Material Property BaselineMaterial type Steel Steel SteelTubing Type Round Round RoundMaterial name /grade Steel Steel SteelYoungs Modulus, E 2.00E+11 2.00E+11 2.00E+11Yield strength, Pa 3.05E+08 3.05E+08 3.05E+08UTS, Pa 3.65E+08 3.65E+08 3.65E+08Yield strength, welded, Pa 1.80E+08 1.80E+08 1.80E+08UTS welded, Pa 3.00E+08 3.00E+08 3.00E+08

Number of tubes 3 3 0Tube OD, mm 25.4 25.4 25.4Wall, mm 1.25 1.25 1.25

Baseline design?Thickness of panel, mm YES N/AThickness of core, mmThickness of skins, mmPanel height,mm

OD, m 0.0254 0.0254 No tubesWall, m 0.00125 0.00125I, m^4 6.93E-09 6.93E-09EI 4.16E+03 4.16E+03Area, mm^2 284.5 284.5Yield tensile strength, N 8.68E+04 8.68E+04UTS, N 1.04E+05 1.04E+05Yield tensile strength, N as welded 5.12E+04 5.12E+04UTS, N as welded 8.54E+04 8.54E+04Max load at mid span to give UTS for 1m long tube, N 2.39E+03 2.39E+03Max deflection at baseline load for 1m long tube, m 1.20E-02 1.20E-02Energy absorbed up to UTS, J 1.43E+01 1.43E+01

1.37E+03 1.39E+03 9.00E+99If FEA is required for Composite structures then add this information below

Your Tube type 1

Your Tube type 2

E16


F16


Tubing only

Your TotalSteel SteelRound NASteel Steel

2.00E+11 2.00E+113.05E+08 3.05E+083.65E+08 3.65E+081.80E+08 1.80E+083.00E+08 3.00E+08

025.41.25

YESN/A 25

221.5

300

No tubes

6.93E-09 Tubing Only 6.93E-094.16E+03 4.16E+03 100.0

284.5 284.5 100.08.68E+04 8.68E+04 100.01.04E+05 1.04E+05 100.05.12E+04 5.12E+04 100.08.54E+04 8.54E+04 100.02.39E+03 2.39E+03 100.01.20E-02 1.20E-02 100.01.43E+01 1.43E+01 100.0

9.00E+99

Your Tube type 3

Your Tubes Total

Your Composite

G16


Impact Attenuator Anti-Intrusion Plate

Material Property Baseline Your PlateMaterial type Steel SteelMaterial name /grade Steel SteelYoungs Modulus, E 2.00E+11 2.00E+11Yield strength, Pa 3.05E+08 3.05E+08UTS, Pa 3.65E+08 3.65E+08Yield strength, welded, Pa 1.80E+08 1.80E+08UTS welded, Pa 3.00E+08 3.00E+08UTS shear, Pa 2.19E+08 2.19E+08

Thickness of panel, mm 1.5 1.5Panel height,mm 305 305

I, m^4 8.58E-11 8.58E-11EI 1.72E+01 1.72E+01 100.0Area, mm^2 457.5 457.5 100.0Yield tensile strength, N 1.40E+05 1.40E+05 100.0UTS, N 1.67E+05 1.67E+05 100.0Yield tensile strength, N as welded 8.24E+04 8.24E+04 100.0UTS, N as welded 1.37E+05 1.37E+05 100.0Perimeter shear strength for 25mm dia punch, N 2.58E+04 2.58E+04 100.0Max load at mid span to give UTS for 1m long tube, N 1.67E+02 1.67E+02 100.0Max deflection at baseline load for 1m long tube, m 2.03E-01 2.03E-01 100.0Energy absorbed up to UTS, J 1.69E+01 1.69E+01 100.0

PA

D4

Use "Aluminium 1" for baseline aluminium AI plate

C14

As per FSAE standard impact attenutor

Enter construction type Tubing only

Material Property BaselineMaterial type Steel Steel SteelTubing Type Round Round RoundMaterial name /grade Steel Steel SteelYoungs Modulus, E 2.00E+11 2.00E+11 2.00E+11Yield strength, Pa 3.05E+08 3.05E+08 3.05E+08UTS, Pa 3.65E+08 3.65E+08 3.65E+08Yield strength, welded, Pa 1.80E+08 1.80E+08 1.80E+08UTS welded, Pa 3.00E+08 3.00E+08 3.00E+08

Number of tubes 3 3 0Tube OD, mm 25.4 25.4 25.4Wall, mm 1.6 1.6 1.6

Baseline design?Thickness of panel, mm YES N/AThickness of core, mmThickness of skins, mmPanel height,mm

OD, m 0.0254 0.0254 No tubesWall, m 0.0016 0.0016I, m^4 8.51E-09 8.51E-09EI 5.11E+03 5.11E+03Area, mm^2 358.9 358.9Yield tensile strength, N 1.09E+05 1.09E+05UTS, N 1.31E+05 1.31E+05Yield tensile strength, N as welded 6.46E+04 6.46E+04UTS, N as welded 1.08E+05 1.08E+05Max load at mid span to give UTS for 1m long tube, N 2.93E+03 2.93E+03Max deflection at baseline load for 1m long tube, m 1.20E-02 1.20E-02Energy absorbed up to UTS, J 1.76E+01 1.76E+01

1.68E+03 1.70E+03 9.00E+99If FEA is required for Composite structures then add this information below

Your Tube type 1

Your Tube type 2

E16


F16


Tubing only

Your TotalSteel CarbonRound NASteel 2 ply

2.00E+11 0.00E+003.05E+08 0.00E+003.65E+08 0.00E+001.80E+08 N/A3.00E+08 N/A

025.4

1.6YESN/A 25

221.5

300

No tubes

8.51E-09 Tubing Only 8.51E-095.11E+03 5.11E+03 100.0

358.9 358.9 100.01.09E+05 1.09E+05 100.01.31E+05 1.31E+05 100.06.46E+04 6.46E+04 100.01.08E+05 1.08E+05 100.02.93E+03 2.93E+03 100.01.20E-02 1.20E-02 100.01.76E+01 1.76E+01 100.0

9.00E+99

Your Tube type 3

Your Tubes Total

Your Composite

G16



Paste images of test setup here

Figure 1: Test setup - Laminate Panel

Paste load deflection curve here

Figure 2: Load Deflection Curve

Enter values for minimum and maximum load/deflection in linear-elastic region0 0 Gradient (N/mm) 0 12760 0 (>= bending stiffness of one baseline side impact tube)

Enter value for force at panel failure or maximum tested force

0 (>= bending strength of two baseline side impact tubes)

4119Enter details of test setup, panel core and skin thicknesses below

l (mm) 400 Panel Support Spanh (mm) 200 Panel Height (should be 200mm, alternative sizes must be agreed in advance)b (mm) 22 Core Thickness (from B3.24/B3.31 Side Impact Structure tab)

1.5 Inner Skin Thickness (from B3.24/B3.31 Side Impact Structure tab)

1.5 Outer Skin Thickness (from B3.24/B3.31 Side Impact Structure tab)

82950 Second moment of areaE (GPa) 0.0 Skin modulus of elasticity, (this value is used in all CFRP monocoque calcs.)

0 UTS of skins, (this value is used in all CFRP monocoque SES calculations

2012 FSAETM SES - LAMINATE TEST RESULTS

x1 (mm) y1 (N)x2 (mm) y2 (N)

ymax (N)

t1 (mm)

t2 (mm)

I (mm4)

σUTS(MPa)



Figure 3: Test setup - Steel tube(s)


Figure 4: Load Deflection Curve - Steel Tube(s)

Enter values for minimum and maximum load/deflection in linear-elastic region0 0 Gradient (N/mm) 00 0

Enter details of tube(s) tested

l (mm) 400 Tube Support Span 1.74E+09

n 1 Number of Tubes 1.74E+0925.4 Tube Outer Diameter Rig Compliance (N/mm) 022.1 Tube Inner Diameter

2012 FSAETM SES - RIG COMPLIANCE TEST RESULTS (OPTIONAL)

x1 (mm) y1 (N)x2 (mm) y2 (N)

Theoretical EI (N.mm2)

Tested EI (N.mm2)Do (mm)Di (mm)



Figure 1: Test setup



Enter value for force at failure or maximum tested force0 FAIL

Enter details of skin thickness

0.00

0.0 Shear strength of skin, used for attachment calcs where appropriate

2012 FSAETM SES - B3.30.3 PERIMETER SHEAR TEST RESULTS

ymax (N)

t (mm)

σshear (Mpa)



Figure 1: Test setup



Enter value for force at failure or maximum tested force0 FAIL

Enter details of skin thickness

0.00

0.0 Shear strength of skin, used for attachment calcs where appropriate

2012 FSAETM SES - B3.31.3 PERIMETER SHEAR TEST RESULTS

ymax (N)

t (mm)

σshear (Mpa)

Main Hoop Attachments

No. of attachment points per side 2 Note: A minimum of two attachment points per side are required

Attachment 1 FAIL Attachment 2 FAIL

Fastener dia., mm 0 FAIL Fastener dia., mm 0No. of fasteners 0 FAIL No. of fasteners 0

Bracket to hoop weld length, mm 0 FAIL Bracket to hoop weld length, mm 0Bracket thickness, mm 0 FAIL Bracket thickness, mm 0Bracket perimeter, mm 0 Bracket perimeter, mm 0Skin thickness, mm 0 Skin thickness, mm 0Skin shear strength, MPa 0 Skin shear strength, MPa 0Perimeter shear strength, kN 0 FAIL Perimeter shear strength, kN 0

Backing plate thickness, mm 0 FAIL Backing plate thickness, mm 0Backing plate perimeter, mm 0 Backing plate perimeter, mm 0Perimeter shear strength, kN 0 FAIL Perimeter shear strength, kN 0

Insert images of each attachment point proving the values used to prove equivalence below:

Note: A minimum of two attachment points per side are required

FAIL Attachment 3 N/A Attachment 4 N/A

FAIL Fastener dia., mm 0 FAIL Fastener dia., mm 0FAIL No. of fasteners 0 FAIL No. of fasteners 0

FAIL Bracket to hoop weld length, mm 0 FAIL Bracket to hoop weld length, mm 0FAIL Bracket thickness, mm 0 FAIL Bracket thickness, mm 0

Bracket perimeter, mm 0 Bracket perimeter, mm 0Skin thickness, mm 0 Skin thickness, mm 0Skin shear strength, MPa 0 Skin shear strength, MPa 0

FAIL Perimeter shear strength, kN 0 FAIL Perimeter shear strength, kN 0

FAIL Backing plate thickness, mm 0 FAIL Backing plate thickness, mm 0Backing plate perimeter, mm 0 Backing plate perimeter, mm 0



N/A

FAILFAIL

FAILFAIL

FAIL

FAIL

FAIL

Front Hoop Attachments

No. of attachment points per side 2 Note: A minimum of two attachment points per side are required for hoops that aren’t fully laminated into the chassisFront hoop material Steel Note: This affects the minimum bracket to hoop weld length to prove equivalence to a welded side impact tube to hoop jointSide Impact or Frt B'Head S'port SIS Is the hoop attached to the side impact structure or the front bulkhead support structure, this affects the skin shear strength used from test results

Attachment 1 FAIL Attachment 2 FAIL

Fastener dia., mm 0 FAIL Fastener dia., mm 0No. of fasteners 0 FAIL No. of fasteners 0

Bracket to hoop weld length, mm 0 FAIL Bracket to hoop weld length, mm 0Bracket thickness, mm 0 FAIL Bracket thickness, mm 0Bracket perimeter, mm 0 Bracket perimeter, mm 0Skin thickness, mm 0 Skin thickness, mm 0Skin shear strength, MPa 0 Skin shear strength, MPa 0Perimeter shear strength, kN 0 FAIL Perimeter shear strength, kN 0


Insert images of fully laminated hoop or each attachment point proving the values used to prove equivalence below:

Note: A minimum of two attachment points per side are required for hoops that aren’t fully laminated into the chassisNote: This affects the minimum bracket to hoop weld length to prove equivalence to a welded side impact tube to hoop jointIs the hoop attached to the side impact structure or the front bulkhead support structure, this affects the skin shear strength used from test results

FAIL Attachment 3 N/A Attachment 4 N/A

FAIL Fastener dia., mm 0 FAIL Fastener dia., mm 0FAIL No. of fasteners 0 FAIL No. of fasteners 0

FAIL Bracket to hoop weld length, mm 0 FAIL Bracket to hoop weld length, mm 0FAIL Bracket thickness, mm 0 FAIL Bracket thickness, mm 0

Bracket perimeter, mm 0 Bracket perimeter, mm 0Skin thickness, mm 0 Skin thickness, mm 0Skin shear strength, MPa 0 Skin shear strength, MPa 0


FAIL Backing plate thickness, mm 0 FAIL Backing plate thickness, mm 0Backing plate perimeter, mm 0 Backing plate perimeter, mm 0


Insert images of fully laminated hoop or each attachment point proving the values used to prove equivalence below:

N/A

FAILFAIL

FAILFAIL

FAIL

FAIL

FAIL

Monocoque Hoop Bracing Attachments

Front Hoop Brace to Monocoque? NO Set to "NO" if the front hoop bracing is attached to tubes or is integral to the monocoqueFront Hoop Brace Material? Steel This affects the minimum bracket to hoop weld length to prove equivalence to a welded side impact tube to hoop jointMain Hoop Brace to Monocoque? NO Set to "NO" if the main hoop bracing is attached to tubesSide Impact or Frt B'Head S'port SIS Is the main hoop bracing attached to a laminate the same as the side impact structure or front bulkhead support?

Front Hoop Bracing Attachment N/A Main Hoop Bracing Attachment N/A

Fastener dia., mm 0.0 FAIL Fastener dia., mm 0.0No. of fasteners 0 FAIL No. of fasteners 0

Bracket to brace weld length, mm 0 FAIL Bracket to hoop weld length, mm 0Bracket thickness, mm 0 FAIL Bracket thickness, mm 0Bracket perimeter, mm 0 Bracket perimeter, mm 0Skin thickness, mm 0 Skin thickness, mm 0Skin shear strength, MPa 0 Skin shear strength, MPa 0Perimeter shear strength, kN 0 FAIL Perimeter shear strength, kN 0



Set to "NO" if the front hoop bracing is attached to tubes or is integral to the monocoqueThis affects the minimum bracket to hoop weld length to prove equivalence to a welded side impact tube to hoop jointSet to "NO" if the main hoop bracing is attached to tubesIs the main hoop bracing attached to a laminate the same as the side impact structure or front bulkhead support?

N/A

FAILFAIL

FAILFAIL

FAIL

FAIL

FAIL



Paste images of test setups here

Figure 1: Test setups

Paste load deflection curves here

Figure 2: Load Deflection Curves Shoulder harness attached to monocoque? NOPASS Lap-belt attached to monocoque? NO

Anti-submarine bolt attached to monocoque? NOCombined Lap & Anti-submarine belt? NO

Shoulder Harness AttachmentEnter value for force at failure or maximum tested force (>= 13000N)

0 N/A

Lap Belt AttachmentEnter value for force at failure or maximum tested force (>= 13000N)

0 N/A

Anti-submarine Belt AttachmentEnter value for force at failure or maximum tested force (>= 6500N)

0 N/A

Combined Lap Belt & Anti-submarine Belt Attachment

2012 FSAETM STRUCTURAL EQUIVALENCY SPREADSHEET - HARNESS ATTACHMENT TEST RESULTS

ymax (N)

ymax (N)

ymax (N)

Enter value for force at failure or maximum tested force (>= 19500N)0 N/Aymax (N)

Shoulder Harness Bar EquivalencyEnter construction type





E16


Tubing only

Your Composite Your TotalCarbonN/A2 ply

0.00E+000.00E+000.00E+00

N/AN/A

2220

1300

Tubing Only 1.16E-082.32E+03 100.0

173.4 100.05.29E+04 100.06.33E+04 100.03.12E+04 100.05.20E+04 100.01.33E+03 100.01.20E-02 100.07.98E+00 100.0


If you have a monocoque chassis enter your proof of equivalency to 4 Grade 8.8 M8 fasteners in the cells below.

2012 FSAETM SES - MONOCOQUE IA ATTACHMENTS

Welded Tube Insert Equivalency - required for all mandated tubes per B3.3.1 with drilled holes > 4mm dia.If you have more than one type of insert please copy this tab

Material Property Your TubeMaterial type Steel SteelTube Shape Round N/AMaterial name /grade Steel SteelYoungs Modulus, E 2.00E+11 2.00E+11Yield strength, Pa 3.05E+08 3.05E+08UTS, Pa 3.65E+08 3.65E+08Yield strength, welded, Pa N/A 1.80E+08UTS welded, Pa N/A 3.00E+08

Tube OD, mm 25.4Wall, mm 2.4

Your TubeOD, m 0.0254Wall, m 0.0024I, m^4 1.15935E-08 0.00E+00EI 2.32E+03 0.00E+00 0.0Tube area, mm^2 173.4 0.0 NAInsert area, mm^2 NA 0.0 NAYield tensile strength, N 5.29E+04 0.00E+00 0.0UTS, N 6.33E+04 0.00E+00 0.0Max load at mid span to give UTS for 1m long tube, N 1.33E+03 0.00E+00 0.0Max deflection at baseline load for 1m long tube, m 1.20E-02 0.00E+00 999.0Energy absorbed up to UTS, J 7.98E+00 0.00E+00 0.0Note - the calculations above take account of the "as welded condition" strength reductionInsert calculations or CAD screenshot proving tube + insert area and second momentof area below. Use the "Additional Info" tab if more space is needed.

Your Tube + Insert

Your Tube + Insert

D19

About the weakest axis

Welded Tube Insert Equivalency - required for all mandated tubes per B3.3.1 with drilled holes > 4mm dia.


2012 FSAETM STRUCTURAL EQUIVALENCY SPREADSHEET - CONTINUATION TAB

Please use this sheet to include additional information required for your proof of equivalency that isn't covered by the standard forms e.g. material receipts. This tab may be copied if one page isn't sufficient.

2012 FSAE Structural Equivalency Spreadsheet V1.0.13

Documents

hoop weld

grade youngs

main hoop

elastic region

marginally

front hoop

show clearer

1m long tube