Mechanisms of ductile fracture in pure silver under high-triaxial stress states

摘要: Abstract Experimental and finite element method (FEM) analyses were used to study the mechanisms of ductile fracture constrained, high-purity, silver interlayers under high triaxial stress states. Interlayer bonds loaded in simple tension, develop a principal state that is large axi-symmetric. Ductile, low macroscopic plastic-strain failure was observed these when maximum mean stress: yield ratio ( σ m y ) approached approximately four, agreement with recent numerical by other investigators, who postulated unstable growth cavity subjected far-field axi-symmetric at this ratio, without significant plastic strain. Ambient temperature delayed-failure (creep) tests constrained interlayers, relatively applied loads, also appear be due growth. The mechanism further studied biaxially loading through application various combinations tension torsion load. Low macroscopic-strain fractures are again observed, but non-axi-symmetric failure-stress values FEM analysis levels required for instability do not directly support an model.