Experimental investigation on effects of restrict layer debonding and crack burning

The fault effects on restrict layer debonding and crack burning were studied by simulated test in order to provide analysis basis of fault diagnostics for solid rocket engine. Test proved that the debonding of free load restrict layer resulted in increasing burning area and pressure exponent while the debonding of restrict layer pasted to chamber wall even resulted in effect of serious erosive burning. The debonding and the deep crack burning might cause serious pressure peak in the beginning of engine starting. If a strength margin was not big enough, a blast might happen in the very short period after ignition of the motor.