plastic deformation theory meaning in English

塑性形变理论

This paper puts to use a tensile test from the plastic deformation theory , and has deduced the mathematical formulas on determing criterion in the various conditions such as the sotropy and anisotropy materials , plane stress , plane strain , space stress and strain
文章采用拉伸试验，根据塑性变形理论，推出了各向同性和各向异性材料在平面应力应变、空间应力应变等多种条件下的判断准则的数学表达式。