Stress Displacement at Elevated Temperatures

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SUMMARY

The forum discussion centers on the Finite Element Analysis (FEA) of an aluminum alloy (6063 T6) under elevated temperatures, specifically at 150 degrees Celsius. The user observed that the displacement of the model remained unchanged despite a significant reduction in Ultimate and Yield Strengths, which dropped by 35% to 40%. The discussion concludes that adjusting the modulus of elasticity for elevated temperatures is essential to accurately predict deflection in such scenarios.

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Mechanical engineers, materials scientists, and FEA analysts who are involved in stress analysis of materials at elevated temperatures.

LennieBriese
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I was doing a FEA Stress Analysis of an Alum (6063 T6) part and set the Ultimate and Yield Strength of the material lower to model the behavior at 150 degress C. The displacement (movement) of the model was exactly the same for relatively small forces. The force was 110 N and the Ultimate Tensile Strength was 214 MPa @ 24 degrees C and 145 MPa @ 149 degrees C.

Would the small force displacement be the same even though the Ultimate and Yield Strengths were 35% to 40% lower?
 
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I think you need to change the modulus of elasticity for the higher temperature to get a different deflection.
 

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