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弹塑性理论起于对金属的应力状态和变形定律的研究。在六十年代,开始应用于土的应力应变特性,我国,自黄文熙教授提出弹塑性模型后,此项研究也在逐渐开展。为了进行弹塑性分析,首先要取得弹塑性模型参数。测定这些参数的方法主要是进行三轴试验,观测作用在试样上的三个主应力及相应的应变和体应变等。在此基础上,运用弹塑性增量理论,在正应力p与剪应力q平面上勾画流线与塑性势线,然后通过试算寻求能正确反
The elastoplastic theory begins with the study of the stress state and deformation law of metals. In the 1960s, the stress-strain characteristics of the soil began to be applied. After Professor Huang Wenxi proposed an elasto-plastic model in China, this research has also been gradually carried out. In order to conduct elasto-plastic analysis, we must first obtain the elastoplastic model parameters. The method for measuring these parameters is mainly to perform a triaxial test, observe the three principal stresses acting on the sample, and the corresponding strain and body strain. On this basis, using the elasto-plastic incremental theory, the flow line and the plastic potential line are sketched on the normal stress p and the shear stress q plane, and then it is searched correctly by trial calculation.