STRUCTURAL HYDROBURST TEST MINUTEMAN STAGE III WING II CASE, WEAPON SYSTEM 133A.
HERCULES POWDER CO MAGNA UTAH
Pagination or Media Count:
The capability of the forward skirt and Y-joint area when subjected to a pure compression load with the internal pressure of the pressure vessel at 400 psi is determined. Due to incapabilities of the equipment, it was necessary to run this test twice. The maximum load, when first run, was 100.7 kips with an internal pressure of 404 psi. The equipment was adjusted, and on second run the case failed under a compression load of 156.51 kips with an internal pressure of 401 psi. It was determined that the forward skirt move ment was very slight from the beginning of the test to the time of rupture failure. The maxi mum area of expansion in the pressure vessel oc curred slightly forward of the thrust termina tion TT port area. Both tangent lines expanded approximately the same amount. The over-all growth from bearing surface to bearing surface was 0.087 in. The mode of failure was buckling of the forward skirt approximately midway between the bearing surface and the tangent line area. The buckling occurred in the dog-leg area and propagated circumferentially around the skirt. Author