Resistance method of ductile damage measurement of metallic materials
SUN Bin-Xiang1, GUO Yi-Mu2
1． Departm ent of Civil Engineering，Shaoxing College of Arts and Sciences，Shaoxing 312000，China；
2．M echanics Department，Zhejiang University，Hangzhou 310027，China
Abstract U nder considering plastic deform ation，the form ula of dam age m easurem ent on variation of the electrical resistance was studied． Tensile ductile damage on A3 mild steel specimen was evaluated．The results show that the predictions by variation of the resistance accord with that of the elasticity modulus change．It is presented out that the effect on the plastic deform of specim en length and cross-section must be considered for the m etal m aterial ductile dam age measurement by variation of the resistance．A nd its reliability is based on accurate m easuring of the specimen low electrical resistance．
SUN Bin-Xiang, GUO Yi-Mu. Resistance method of ductile damage measurement of metallic materials. Chinese Journal of Engineering Design, 2002, 9(4): 198-202.
