1分类 2比较

Chapter 4 Differential Relations For Viscous Flow 4.1 Preliminary Remarks Two ways in analyzing fluid motion (1)Seeking an estimate of gross effects over a finite region or control volume. Integral ()Seeking the point-by-point details of a flow pattern by analyzing an infinitesimal region of the flow

When is a flow compressible? compressible flow differs from an incompressible one in that significant change happens in the density

Boundary layer(边界层) Although frictional effects in slightly viscous fluid are indeed present, they are confined to a thin layer near the surface of the body, and the rest of the flow can be considered inviscid. (1904, Prandt/)

Properties of Pressure Vertical to the surface and point into it. At any point, pressure is independent of orientation

Chapter3 Integral Relations(积分关系式) for a Control Volume in One-dimensional Steady Flows 3.1 Systems(体系) versus Control Volumes(控制体) System: an arbitrary quantity of mass of fixed identity. Everything external to this system is denoted by the term surroundings, and the system is separated from its surroundings by it's boundaries through which no mass

Chapter 1 Introduction 1.1 Preliminary Remarks When you think about it, almost everything on this planet either is a fluid or moves within or near a fluid. -Frank M. White What is a fluid?

Two different points of view in analyzing problems in mechanics The Eulerian view(欧拉观点) and the Lagrangian view(拉格朗日观点) Flow classification Streamline(流线)Pathline(迹线)& Flowfield (流场)流线方程计算流谱 Surface force(表面力) and body force(质量力,体积力)

一、概论 二、应力一应变及其基本方程 三、屈服条件与破坏条件 四、塑性位势理论 五、加载条件与硬化规律 六、广义塑性力学中的弹塑性本构关系 七、广义塑性力学中的加卸载准则 八、包含主应力轴旋转的广义塑性力学 九、岩土弹塑性模型

9-1压杆稳定性的概念 9-2细长压杆临界力的欧拉公式 9-3超过比例极限时压杆临界应力 9-4压杆的稳定校核及其合理截面