Learning Forum

[JakeScott]

Hello everybody ,

Im doing a stress-strain analysis on a car frame ;

This is the stress-strain graph that i made for the material of the car frame :

[Ram Gopisetti]

that graph is good, it is also accounding the linear terms from your MAT model (E) followed by plasticity. from 0-say 400 its a linear accentuating the linear elasticity which alos accounts for the deformation.
Cheers, Ram

[JakeScott]

Thanks a lot ive got another question please , this is very important .
So for my car bumper the elastic limit is 270 MPA , but when i plot the stress-strain curve , heres what i get :

From what i've studied , the linear line thats going from 0 to aprox 550 MPA is supposed to be the elastic region , but my yield stress is 270 MPA, so after 270 MPA its supposed to be plastic ( im sorry my english is bad)
How do i get the curve to stay linear till my yield stress than to turn to the plastic region ?
Thank you a lot for your time

[Ram Gopisetti]

how the mesh sensitivity on your model?
cheers, Ram

[jainmr_3]

How to plot this stress strain curve using Ansys workbench. Please guide. I have to plot this curve for the compressive strength of the cube. (M35)