Structural testing is performed to verify the structural integrity of space flight and ground test hardware. Testing is also performed to verify the finite element analysis by measuring stiffness and induced stress at points in a test article. A structural test can be used to verify the modes of failure of a design when exposed to simulated service loads.
The modes of failure include but are not limited to the following: leak before burst, buckling, ultimate failure, yield or excessive deflection. The test lab is also outfitted with a tensile test machine that can be used to develop mechanical properties, at up to 1300°F, in metallic coupons, composite coupons, adhesive joints, and weld joints. A high-temperature laser extensometer can be used to give accurate strain data during tensile testing at elevated temperatures.
