Thermal stress in Dissimilar joint
Thermal stress in Dissimilar joint
(OP)
Hi,
I have a question regarding joint strength of an equipment , which is placed on a honeycomb core and backed by a doubler plate. Please see the attached picture.
The equipment sees high temperature around 102 degrees. I have analysed the joint by calculating the delta displacement from thermal expansion of two metal plates and assumed them to act as parallel spring K= K1 + K2 and found the The total force at the Joint using F= K. delta displacement.
This force is used for checking the fastener shear strength and joint bearing strength.
Is this the right approach or am i missing something??
Thanks
RE: Thermal stress in Dissimilar joint
RE: Thermal stress in Dissimilar joint
Thanks for the reply. I assuming the sandwich has zero TEC, therefore top and bottom doubler plates expands and restricted by the sandwich panel in bearing.
RE: Thermal stress in Dissimilar joint
RE: Thermal stress in Dissimilar joint
I have attached picture for more clarification.
The equipment (Aluminium alloy (0.125" thick base plate) attached to the sandwich mounting plate via 4 steel screws (#10) and an aluminium doubler plate and sealed/bonded at the edges.
To assess the strength due to high temperature (The equipment getting heated upto 102 deg).
I assume the metallic components expands & no expansion in sandwich panel and all the loads taken by the bolts ( no effect on bonding).
Using the above assumptions I have so far checked the bolt shear strength and doubler plate bearing strength?
RE: Thermal stress in Dissimilar joint