Solidworks Simulation Welded Cover for a sealed

Microwave electronics assembly linear elastic stress analysis

D. Blanchet 10/19/2015

Fixed edges Light blue

1 atmosphere internal Pressure loading On this surface

Refined graded mesh in high stress zones

Aluminum 4047 alloy

Aluminum 4047 alloy stepped seal cover design used for laser welding

For this study assume yield strength = 12,000 psi

1,380,000 degrees of freedom 10 node tetrahedral solid elements

Isosurface >= 12,000 psi

Local yielding Probable in Red zones

Linear Elastic deformation

High stress zones – deformation shown @ 120X

A nonlinear analysis may predict permanent deformation values. An accurate stress strain curve for 4047 aluminum alloy is required.

Linear Analysis Cases

Altitude, feet Pressure Differential, psi

Maximum Stress, psi

Volume of material above 12,000 psi yield

0 (leak test) 14.7 internal 86,700 2.6 %

30,000 10.0 57,850 0.9 %

50,000 12.8 74,000 1.7 %

0 (BOM test) 14.7 external 85,000 2.5 %