Marko04
Industrial
- Apr 13, 2016
- 7
Hi,
Below is a link to the video showing animation of an assembly under a dead load and pull out force:
The assembly consist of two aluminum parts that are crimped onto a plastic part (thermal break). What I am trying to see is whether or not the aluminum (6063 t5)crimping legs that crimp the plastic part in the center will fail to sustain these loads (will the forces yield these crimping legs where the legs would open up and no longer hold the plastic part (thermal break)?. The area of concern as shown in the attached image are the inner corners that show stresses more than 3 times greater than the yield of aluminum which is 21000 psi. My question is: Will this cause failure in terms of crack forming in the inside corner? Because aluminum has 26000 psi Ultimate tensile strength and the stress concentrations in the inside of corners are 60 to 70000 psi does this mean then that the material will crack here? Or will it deform locally, only in the neighboring region where these higher than yield stresses would cause the neighboring material to yield causing the loads to re-distribute and hence the stresses would decrease? I am an industrial designer and not well versed in FEA so I am not sure how to interpret the result I got from FEA. I used adaptive meshing and mesh control to refine the mesh in smaller regions to obtain as accurate results as possible and made sure results aren't diverging. If someone could explain to me what your conclusion would be by looking at the attached image showing FEA results. Is this safe design or not? Your answer /feedback would be greatly appreciated.
Image:
Thanks,
Mark
Below is a link to the video showing animation of an assembly under a dead load and pull out force:
The assembly consist of two aluminum parts that are crimped onto a plastic part (thermal break). What I am trying to see is whether or not the aluminum (6063 t5)crimping legs that crimp the plastic part in the center will fail to sustain these loads (will the forces yield these crimping legs where the legs would open up and no longer hold the plastic part (thermal break)?. The area of concern as shown in the attached image are the inner corners that show stresses more than 3 times greater than the yield of aluminum which is 21000 psi. My question is: Will this cause failure in terms of crack forming in the inside corner? Because aluminum has 26000 psi Ultimate tensile strength and the stress concentrations in the inside of corners are 60 to 70000 psi does this mean then that the material will crack here? Or will it deform locally, only in the neighboring region where these higher than yield stresses would cause the neighboring material to yield causing the loads to re-distribute and hence the stresses would decrease? I am an industrial designer and not well versed in FEA so I am not sure how to interpret the result I got from FEA. I used adaptive meshing and mesh control to refine the mesh in smaller regions to obtain as accurate results as possible and made sure results aren't diverging. If someone could explain to me what your conclusion would be by looking at the attached image showing FEA results. Is this safe design or not? Your answer /feedback would be greatly appreciated.
Image:
Thanks,
Mark
