大多数的金属零件与制品都是通过塑性加工方法成形的，塑性加工技术主要包括锻造、冲压、轧制、挤压、拉拔等，这些技术的主要特征是金属坯料在力的作用下产生永久变形（即塑性变形）,从而形成所需要的形状。成形过程的变形分析是以塑性力学和材料科学为基础的，其分析结果是成形工艺设计和装备设计的理论依据。因此，金属塑性加工力学是材料加工工程学科的重要基础课程之一。本课程要解决的主要问题有：1. 金属塑性加工过程的应变分析与变形分析，为合理选择坯料形状、控制制品的形状质量和设计变形工艺提供依据。2. 塑性加工过程的应力分析与成形力分析，为选择成形设备吨位、控制制品残余应力提供依据。3. 金属塑性变形微观组织的演变及其对产品力学性能的影响，为控制产品的内在质量提供依据。为实现这些目标，本课程主要强化以下理论基础知识：1. 大变形过程的描述方法，应力和应变的表述以及各自要遵循的基本方程与边界条件。2. 材料的塑性变形性质与本构关系，金属发生塑性变形的条件以及塑性变形时的应力应变关系。3. 金属塑性变形时要遵循的基本原理特别是能量原理，基于能量原理的塑性变形分析方法，如上限法、刚塑性有限元法等。4. 金属塑性变形的微观机制以及产品的力学性能控制等。

Most metal parts and products are manufactured through plastic metal forming technology. Metal forming technology mainly includes forging, stamping, rolling, extrusion, drawing, et al. The typical characteristic of these technologies is that the metal workpiece undergoes permanent deformation through the process by means of applied force so that the desired shape is obtained. The deformation analysis in metal forming process is based on plasticity theory and material science, and the corresponding results takes a great role as fundamental reference in the design of metal forming procedure and forming machines. The course of “Plasticity in metal Forming” is therefore one of the key courses in study of materials processing engineering.The purposes of this course are:1. Strain and deformation analysis of metal forming process so that to provide theoretical bases for rationally designing billet or sheet profile, controlling the surface quality, and laying out the processing schedule.2. Stress and forming load analysis of metal forming process so that to provide theoretical bases for selecting machine capacity, preventing the product from residual stress.3. Prediction of metal microstructure evolution and its influence to the product mechanical properties so that to provide reference for controlling the inner quality of the product.For these purposes, the main theoretical bases that should be emphasized in this course are as follows:1. The configuration of large displacement deformation case, the formulation of stress and strain for nonlinear deformation behavior, and the governing differential equations and boundary conditions of these variables.2. Material plastic deformation behavior and constitutive relations, yielding criterion and stress-strain relationship for plastic deformation.3. Basic principle, especially the energy theorem, for metal plastic deformation, energy theorem based analysis method, such as upper bound method, rigid plastic finite element method, et al.4. Microscopic mechanism in metal plastic deformation, and corresponding product mechanical property control.