The effective young's modulus of the facing is computed taking in to consideration the effect of the resin (polyester) also The facing is a laminate with the following orientation - 0/+45/-45/90… The effective youngs modulus is taken and used in the calculations below Input Units Converted Input Units Nomenclature Assumptions: Ef 13.86 GPa Ef 1.386E+10 Pa Effective Youngs Modulus of the facing sheet 1. The following formulas assume 2. Thin facing skin made of same tf 3.736 mm tf 0.003736 m Facing thickness 3. Uniform facing thickness => t1 = 4. Core relatively much less stiffer h 45 mm h 0.045 m Distance between facing skins = tf + tc 5. b <= (l/3) For Beam 6. For analytical calculation the be Gc 35 MPa Gc 35000000 Pa Shear modulus of the core Input sought from USE Kb 0.020833 Kb 0.0208333 Beam - bending deflection coefficient SSB Output given to USER Ks 0.25 Ks 0.25 Beam - shear deflection coefficient SSB P 36 KN P 36000 N Load acting on the Anchor Point L 2m L 2m Length of the beam b 0.6 m b 0.6 m Beam width M 18000 Nm Maximum bending moment (P*l)/4 F 18000 N Maximum shear force P/2 tc 41.264 mm tc 0.041264 m Core thickness Bending stiffness - D 31456.933 Nm2 Shear stiffness - S 945000 N Bending Deflection 0.190737 m 190.737 mm + Shear Deflection 0.0190476 m 19.04762 mm
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The effective young's modulus of the facing is computed taking in to consideration the effect of the resin (polyester) also
The facing is a laminate with the following orientation - 0/+45/-45/90… The effective youngs modulus is taken and used in the calculations below
Input Units Converted Input Units Nomenclature Assumptions:
Ef 13.86 GPa Ef 1.386E+10 Pa Effective Youngs Modulus of the facing sheet 1. The following formulas assume symmetry about the neutral axis
2. Thin facing skin made of same material
tf 3.736 mm tf 0.003736 m Facing thickness 3. Uniform facing thickness => t1 = t2 = tf
4. Core relatively much less stiffer than skins
h 45 mm h 0.045 m Distance between facing skins = tf + tc 5. b <= (l/3) For Beam
6. For analytical calculation the beam is assumed to be simply supported on two sides
Gc 35 MPa Gc 35000000 Pa Shear modulus of the core