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应力应变状态与强度理论
!NOTE 约定主应力按代数值排序 $\sigma1 \ge \sigma2 \ge \sigma3$；拉应力为正，压应力为负。 一、应力状态 1、应力是位置的函数 材料中不同点处的应力一般不同： $$ \sigma=\sigmax $$ 更一般地，三维连续体中某点的应力状态可由应力张量表示： $$ \boldsymbol{\sigma}...
Axial Loading
I. Concepts and Examples The bars is subjected to a pair of longitudinal forces with equal magnitude and opposite directions, and the line of action forces coincides with the axis...
Stress and String
I. Stress The internal force of a member is not uniformly distributed in most cases, so the definition of internal force concentration is not only accurate but also important, bec...
Introduction of Mechanics of Materials
I. Introduction 1. An Overview of Mechanics of Materials Mechanics of materials mainly studies the deformation of deformable body under external forces,, the additional internal...