Studies of Internal Displacements in Solid Propellant Grains. (Study of Deformation Surface in Strain Space)

摘要

Nine elastomer strain gage modules were fabricated and evaluated. Each module contains four independent sensing elements; three of the elements are orthogonal and the fourth element is skewed at an equal angle from the orthogonal elements. In manufacturing unidirectional, surface mountable gages, a large number (about 50 percent) of devices fail during fabrication steps. As might be expected, only about one in ten of the four-element modules emerges from fabrication with all elements operational. (Author)