The logical extension of discrete mass systems is one of an infinite number of masses. In the limit, this is a continuous system. Take the generalized beam-column as a generic representation:

江苏科技大学：《船舶结构力学》课程教学资源（教案讲义）第一章 绪论（主讲教师：刘昆）

江苏科技大学：《船舶结构力学》课程教学大纲 Ship Structural Mechanics I

Thus far we have discussed mechanical loading and the stresses and strains caused by that We noted, however, that the environment can have an effect on the behavior of materials and structures. Let's first consider:

Summarizing what we've looked at in elasticity, we have: 15 equations in 15 unknowns 3 equilibrium -6 strains -6 strain-displacement -3 displacements

There are many structural configurations where we do not have to deal with the full 3-D case. First let's consider the models Let's then see under what conditions we can apply them A. Plane Stress

As we've previously noted, we may often want to describe a structure in various axis systems. This involves... Transformations (Axis, Deflection, Stress, Strain, Elasticity Tensors) e.g., loading axes material principal axis Figure 7.1 Unidirectional Composite with Fibers at an Angle

延安大学：《结构力学 Structural Mechanics》课程教学资源（手稿）第三章 静定梁课后作业答案

第一节 概 述 第二节 三铰拱的内力计算 第三节 合理拱轴

《结构力学》课程教学资源（课件讲稿）第九章 矩阵位移法 9.1 概述