Brazil 2014ugm Pre Certification of Rops for Agricultural Tractors
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8/10/2019 Brazil 2014ugm Pre Certification of Rops for Agricultural Tractors
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Pre-certification of ROPS for agricultural
tractors through CAE technology
Igor Saveljevas Rodrigues - VirtualCAE
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Topics
Company : VirtualCAE
Federal Regulation
Norm : ABNT NBR ISO 5700:2009
Agriculture companies
Static analysis: Simplifications
Contact
Material
Loads and boundary conditions
Survival cell
Results
Next steps
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VirtualCAE
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Reference : Massey Ferguson
ROPS
Figure 1 Tractor with or without ROPS
ROPS Roll over protective structure
Retrieved from : http://www.massey.com.br/produtos/tratores/serie-mf-2600/(Mar, 2014)
http://www.mestredicas.com/tratores-massey-ferguson/http://www.mestredicas.com/tratores-massey-ferguson/8/10/2019 Brazil 2014ugm Pre Certification of Rops for Agricultural Tractors
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ABNT NBR ISO 5700:2009
Federal regulation do not determine norms
Either procedures or methods
Where? > Technical standards (ISO, ABNT...)
ISO 5700:2009
Destructive testing
Static loads Survivall cell
Certification of ROPS in case of tractor roll over
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Agriculture companies
Outsourcing : cabin
Cabin is used on several types of tractors
Outsourcing : virtual certification
Destructive test
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Simplifications
Figure 2 ROPS test
Retrieved from : http://www.agrital.com/english/tecnicoUK.htm/(Mar, 2014)
Reference : Agrital
Reduce the solvingtime without changing
the results
http://www.mestredicas.com/tratores-massey-ferguson/http://www.mestredicas.com/tratores-massey-ferguson/8/10/2019 Brazil 2014ugm Pre Certification of Rops for Agricultural Tractors
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Static analysis : simplifications
Figure 3 Axis and transmission
Retrieved from : http://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.html(Mar, 2014)
Reference : ZF Reference : the Author
Figure 4 Rear support
http://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.htmlhttp://www.directindustry.com/prod/zf-maschinenantriebe/powershift-transmission-tractors-16154-653933.html8/10/2019 Brazil 2014ugm Pre Certification of Rops for Agricultural Tractors
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Static analysis : simplifications
Figure 5 Elastic damper
Retrieved from : https://brammeronline.de/product/info/397007/name/MEGU_5718228_50NR11_KONUSLAGER_FREUDENBERG(Mar, 2014)
Reference : Brammer
Figure 6 Front support
Reference : the Author
https://brammeronline.de/product/info/397007/name/MEGU_5718228_50NR11_KONUSLAGER_FREUDENBERGhttps://brammeronline.de/product/info/397007/name/MEGU_5718228_50NR11_KONUSLAGER_FREUDENBERG8/10/2019 Brazil 2014ugm Pre Certification of Rops for Agricultural Tractors
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Static analysis : simplifications
Small radius and holes
Extraction of middle surface
Assembly corrections
Screws
Simplification of some geometries
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Static analysis : contact
Figure 7 Contact
Reference : the author
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Static analysis : material
Graphic 1 AISI 1020 Stress-strain curve
Reference : MatWeb
Retrieved from : http://www.matweb.com/search/DataSheet.aspx?MatGUID=b58ee61a3745453a9232f7864abba74f(Mar, 2014)
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Static analysis : loads
Table 1 - ROPS LOADS
ID Load Criteria Definition
1 Rear longitudinal Energy E = 1,4 x mass
2 Rear crush Force F = 20 x mass3 Side transverse Energy E = 1,75 x mass
4 Front crush Force F = 20 x mass
ROPS must be approved in each test
The structure must not penetrate the survival cell
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1 2
Rear Longitudinal Rear Crush
Static analysis : loads
Figure 8
Loads
Reference : the author
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Static analysis : loads
Figure 9
Loads
Reference : the author
4
Side transverse Front Crush
3
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Static analysis : boundary conditions
Figure 10 Boundary conditions
Reference : the author
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Static analysis : survival cell
Figure 11 Survival cell
Reference : the author
Figure 12 Standard specification
Reference : ABNT ISO 5700:2009
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Static analysis
Figure 13
Final model
Reference : the author
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Results
Reference : the author
Figure 14
Deformation
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Results
Reference : the author
Figure 15Energy probe
A
B
A : Energy : rear longitudinal
B : Energy : side transverse
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Next Steps
Comparison between the real test and thevirtual simulation
Improve the virtual model to reduce the error
between the tests
Certify someday only by CAE technology
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