MEASURING SHEAR STRESS AT AN INTERFACE WITH TWO WALLS AND TWO CROSSED SENSOR ELEMENTS

摘要

A stress sensor (10) is provided that is suited for measurement of stress between adjacent mated bodes, such as an interface. The stress sensor permits measurement of stress, preferably a shear component of the stress substantially exclusive of the normal component. Sensor (10) comprises two walls (14, 16) and crossed sensor elements (32, 34). It is arranged with an adhesive layer (86) between a solid propellant (84) and an insulating layer (88). Use with solid rocket motor. The sensor elements (32, 34) are optical fiber Fabry-Perot strain gages with Fizeau interferometer output elements.