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为了明确块体非晶合金屈服行为与屈服准则的关系,对非晶合金屈服强度间相互关系以及试验中拉伸和压缩断裂面与最大剪应力作用的45°倾斜面的偏离角度进行分析,应用滑移线间断场理论和Mises屈服条件计算出拉伸颈缩断裂面与载荷轴夹角和块体非晶合金实验结果的一致性,利用Coulomb屈服条件计算出的单轴压缩断裂面倾斜角与实验结果相吻合,确定块体非晶合金在不同应力状态下遵循不同的屈服准则:在拉伸条件下该块体非晶合金遵循Mises屈服准则;在压缩条件下遵循Coulomb屈服准则。
In order to clarify the relationship between the yield behavior of bulk amorphous alloy and yield criterion, the relationship between the yield strength of amorphous alloy and the deviation angle of 45 ° inclined plane between the tensile and compressive fracture surface and the maximum shear stress in the test was analyzed. Slip line discontinuous field theory and Mises yield conditions to calculate the tensile neck and rupture angle of the load axis angle and bulk amorphous alloy experimental results consistent with the use of Coulomb yield conditions calculated uniaxial compression fracture surface tilt angle and The experimental results are in good agreement with each other to confirm that the bulk amorphous alloy follows different yield criterion under different stress states. The amorphous alloy follows the Mises yield criterion under tensile conditions and follows the Coulomb yield criterion under compressive conditions.