叠加变形有限应变分解及其应用探讨

本文提出了二维不同类型叠加变形的有限应变分解方法。只要测定有限应变及能代表各期主应变面的面理或剪切指向,就可以计算出各期构造应变。

A PRELIMINARY APPROACH TO FINITE STRAIN FACTORIZATION OF SUPERPOSED DEFORMATION AND ITS SIGNIFICANCE

Measured rock finite strain is often an overall strain of superposed deformations It should be factoried to understand every phase strain.This paper presents some simple caculation methods for finite strain factorization of varied superposed deformation in two dimensions and tests them using superposed deformation simulated by a computer.On the basis of the determination of finite strain the strain of different phases can be caculated if foliation or shear sense are certain. Finally the relation of finite strain to cleavage, the problem on determination of three-dimensional finite strain, and the application and signification of finite strain factorization are also discussed in the paper from the point of view of superposed deformation and strain factorization.