ELASTIC-PLASTIC FIELDS NEAR THE GROWING CRACK TIP
扩展裂纹尖端弹塑性场

In this paper,the propagation process of a crack in the power-law hardeningmaterials is accurately calculated by the elastic- plastic finite element method under planestrain and Mode I conditions. The elaistic-plastic fields near the growing crack tip are givenin detail.A unified three term solutions of stress fields ahead of the growing crack tip are firstpresented. The firs t term is t he H RR singularity solut io n. T he second t erm describes thetriaxiality The third term includes a linear term of the radius coordinate r besides the HRRsingularity term.Th is conclusion is completely sat isfied for t he various sp ecimen geometries, differentmaterials and a variety of yielding degrees from small scale yielding to large scale yielding.