根据应力光图直接解答弹性力学平面问题的方法

假设弹性力学平面问题中的主应力差函数q(x,y)已由应力光图试验确定。以此为基本数据,根据给定的载荷及边界条件,利用数值解法道接求出主应力之和及主应力方向,再求出σ_1,σ_2,θ,这是Fppl方法的一种改进。由于这方法是以准确度高的实验数据q(x,y)为出发点来求问题的完全解,所以数值计算的误差可以减小。     

THE FINITE ROTATION PARAMETER OF A DEFORMABLE BODY AND GYROMAGNETIC EFFECT

The derivation of synge[2]for the finite rotation formula interms of Euler parameter is put into tensor form.Hence a fur-ther clarification of the geometric meaning of the orthogonaltransformation obtained in the author’s paper[7]is made.Thetensor properties of rotation axis vector are also discussed.By means of the method of co-moving coordinate system establi-shed in[8],[9],we explain the gyromagnetic effect.and derivea simple formula for calculating bodg couple which is inducedby magnetization.     

Application of Chien’s Theorem to General Variational Principle in Finite Elasticity with Body Couple

An important theorem proved by W.Z.Chien[1]states the equivalenceof the functionals in general variational principles of potential energy andcomplementary energy.The stated theorem is applied now in formulation ofgeneral variational principle in finite elasticity with body couple(polarelasticity).Comoving coordinate system is being used in the derivationthroughout(refer to[6],[8]).     

岩石类材料裂纹分叉非规则性几何的分形效应

本文考察了岩石裂纹(从晶粒尺寸的微裂纹到几千米的断层构造)的分叉在几何上存在的非规则性,在文献[10,11]的基础上,应用分形(fractal)几何建立了裂纹分叉的分形模型,分析了裂纹分叉的分形效应,从几何的角度研究了裂纹分叉使断裂韧性提高的物理力学现象,导出了一个比smith公式更合理的断裂韧性计算式。     

Deformation analysis of laser spectra based on S-R decomposition theorem

ＭｏｄｅｒｎｏｐｔｉｃａｌｔｈｅｏｒｙｈａｓｓｈｏｗｎｔｈａｔｔｈｅｆａｒｆｉｅｌｄｏｒＦｒａｕｈｏｆｅｒｄｉｆｆｒａｃｔｉｏｎｅｑｕｉｐｍｅｎｔｉｓｉｄｅｎｔｉｃａｌｔｏｔｈｅＦｏｕｒｉｅｒｓｐｅｃｔｒａａｎａｌｙｚｅｒ．ＩｎｔｈｅＦｏｕｒｉｅｒｓｐｅｃｔｒａｌａｎａｌｙｚｅｒｔｈｅＦｏｕｒｉｅｒｓｐｅｃｔｒａｏｒｔｈｅＦｒａｕｎｈｏｆｅｒｄｉｆｆｒａｃｔｉｏｎｐａｔｔｅｒｎｏｆａｎｉｍａｇｅｉｓｆｏｒｍｅｄｏｎｔｈｅｂａｃｋｆｏｃａｌｐｌａｎｅｗｈｅｎａｌａｓｅｒｂｅａｍｉｓｄｉｒｅｃｔｅｄ…     

Effective stress laws for multi-porosity media

Ｔｈｅｃｏｎｃｅｐｔｏｆｅｆｆｅｃｔｉｖｅｓｔｒｅｓｓｉｓｖｅｒｙｕｓｅｆｕｌｔｏｄｅｓｃｒｉｂｅｔｈｅｅｆｆｅｃｔｏｆｐｏｒｅｆｌｕｉｄｐｒｅｓｓｕｒｅｏｎｔｈｅｍｅｃｈａｎｉｃａｌｒｅｓｐｏｎｓｅｏｆｐｏｒｏｕｓｍｅｄｉａ．Ｔｅｒｚａｇｈｉｆｏｕｎｄｔｈｅｆｏｌｌｏｗｉｎｇｆａｃｔｓ：１）Ｉｆｔｈｅｅｘｔｅｒｎａｌｓｔａｔｉｃｐｒｅｓｓｕｒｅｓσ１＝σ２＝σ３ａｎｄｔｈｅｐｏｒｅｐｒｅｓｓｕｒｅｉｎｃｒｅａｓｅｔｈｅｓａｍｅａｍｏｕｎｔｗｉｔｈｔｈｅｐｒｅｓｓｕｒｅｓ,ｔｈｅｖｏｌｕｍｅｏｆ…     

活体大变形的能量原理

活体是具有自组织和自调控能力的生命系统.讨论活体的能量原理包含有力学和热力学原理两大部分.经典的小变形力学和可逆平衡态热力学理论巳不足于描述活体的运动.本文从大变形非对称应力理论力学描述活体宏观运动的力学能量原理.有关不可逆热力学问题将另文讨论.     

Second-order effect of an elastic circular shaft during torsion

In this paper we deal with the second-order effect of an elastic circular shaft duringtorsion.The analysis is based on the method of co-moving coordinates and the strain-rotation decomposition theorem in continuum mechanics.By using asymptotic expansionmethods,we comfirm that the effect of axial elongation and distortion of plane cross-section exists in an elastic circular shaft during large torsion and give the expressions ofthe axial force and the torque.