高级有限元及无网格法在加工制造及材料破坏分析中的应用
课程目标(Objectives):

本课程主要介绍无网格法和高级有限元法在加工制造分析中的应用,涵盖数值方法简介,LS-DYNA关键字说明和应用实例。我们将提供丰富的培训例题帮助学员熟练应用这些功能模块。

This class covers various Meshfree and advanced FEM methods for manufacturing application. The class will provide the fundamental background, the related LS-DYNA keywords, practical applications and their latest developments. Benchmarks are presented in the workshop as demonstrations for training purpose.

课时:

一天

Duration:

One day

授课语言:

中文

Language:

Chinese

主要内容(Main Contents):


A. 破坏性加工:

1). 应用种类:磨削,铆接,切削,流钻螺丝,自冲铆,自攻螺丝,钻孔

2). 特点:工件/刀具的交互作用及应力分析

3). 数值方法:光滑粒子伽辽金法,近场动力学

4). 材料类型:金属,复合材料

A. Destructive manufacturing

1). Application: grinding, riveting, cutting, flow drill screw, self-pierce riveting, self-tapping screw, drilling

2). Features: workpiece-tool interaction and stress analysis

3). Approaches: SPG (smooth particle Galerkin), peridynamics

4). Materials: metal, composite

B. 材料破坏行为分析:

1). 应用种类:冲撞与穿透,固体中的三维动态裂纹扩展,复材分层,碎片化

2). 特点:材料应力破坏

3). 数值方法:光滑粒子伽辽金法,近场动力学

4). 材料类型:金属,混凝土,岩土,复合材料,玻璃等脆性材料

B. Material failure and fragmentation analysis

1). Application: impact and penetration, 3D crack propagation in solid, delamination and folding, fragmentation

2). Features: material fragmentation due to dynamic wave propagation

3). Approaches: SPG (smooth particle Galerkin), peridynamics

C. 非破坏性加工:

1). 应用种类:锻造,挤压,应力回弹,复材压模

2). 特点:大变形,热固耦合,隐式及显式计算

3). 数值方法:自适应有限元及无网格法,光滑粒子伽辽金法

4). 材料类型:金属,复合材料

1). Application: forging, extrusion, spring back, compression molding

2). Features: large deformation, coupled thermal-mechanical, implicit and explicit

3). Approaches: Adaptive FEM/EFG (element free Galerkin), SPG (smooth particle Galerkin)

4). Materials: metal, composite


  • 培训课程专家(Instructor):


    吴有才:博士,毕业于加州大学洛杉矶分校,有10年的LSDYNA使用及混凝土本构模型的开发经验,于2015加入LSTC从事高级有限元及无网格的开发及其在加工制造和材料破坏过程的分析。

    Youcai Wu: Ph.D., graduated from UCLA (University of California, Los Angeles), 10-year experience of LSDYNA advanced application and concrete constitutive modeling, joined LSTC in 2015, focused on development of advanced FEM and meshfree methods and its application in the analysis of manufacturing and material failure and fragmentation processes.

    任波:博士,从事弹性、塑性材料损伤及裂纹扩展先进数值计算方法开发和工程问题的应用。

    Bo Ren: Ph.D., more than 10 yrs. experience on the development of advanced numerical methods for the failure and crack propagation process in brittle/ductile solid materials.

    胡炜/Wei Hu 博士从2009年开始在LSTC从事三维自适应网格重构及无网格法相关的开发和工程问题的应用

    W. Hu: Ph.D., graduated from the department of civil engineering in UCLA in 2007, and joined LSTC in 2009. He has been working on the research and development of adaptivity and meshless methods.