【摘要】 本文基于细观观点,用线排列动力位错模拟运动裂纹,通过叠加方法处理弹塑性运动裂纹问题,求出了各种情形下的动力张开位移,从而给出了运动裂纹的一个弹塑性失稳判据,并就Ⅰ,Ⅱ,Ⅲ型运动裂纹展开进行了讨论.更多还原

【Abstract】 In the range of micro-cosmic, an analogy between linear dislocation arrays and moving cracks is drawn, then elastoplastic moving crack problems are derived by superposition of distribution of dislocations. Various dynamical crack-opened-displace-ments are derived, which gives an elastoplastic stability criterion of moving cracks. In this paper, modes I,II,III moving crack problems are discussed, respectively.更多还原