Experimental Research on Crazing Damage in PMMA

In this paper,the damage theory of rheologic material with defect and the microscope technique are used to research the variation of crazing damage under creep condition on line and real time experimentally.By observing the parameter of damage quantification ally,variation of crazing damage with time is available accurately under different stress level.The craze damage evolution equation for PMMA under creep condition is derived theoretically.