- #1
Confusedbiomedeng
Homework Statement
Consider the cube with sides a=b=c=10cm . This block is tested under biaxial forces that are applied in the X and y directions. Assume that the forces applied have equal magnitudes of Fx=Fy=2x10^6 and that the modulus and poissons ratio of the block material is E=2x10^11 Pa and poissons ratio is = 0.3
I) find the new dimensions of sides if both are tensile and I) if Fx is tensile and fy is compressive
Homework Equations
σ=F/A
εX=1/E(σx-νσy)
The Attempt at a Solution
σX=2x10^6/0.1=2x10^7
Same for σy as same variables
εX= 1/2x10^11(2x10^7-0.3(2x10^7))
εX = 7x10^-5
εY= same as same variables
=> a=0.100007m
b=0.100007m
C=0.09993m
I know that this is wrong but I can't seem to figure out why and I can't seem to do when one is tensile and one is compressive could really use help