Plenary Lecture Speakers (大会报告) 

杨秀敏 院士 Prof. GR Liu Prof. T Rabczuk Prof. Z Chen
张雄 教授 王东东 教授 刘谋斌 教授  
姚振汉 教授 庄茁 教授 章青 教授  

XM Yang 杨秀敏院士







GR Liu  Prof. G. R. Liu
  Professor of Aerospace Engineering and Engineering Mechanics
  Ohio Eminent Scholar (State Endowed Chair)
  University of Cincinnati
  Cincinnati, OH 45221-0070

  Curriculum vitae


Meshfree Methods: Strong, Weak and Weakened Weak (W2) formulations

Theory and Formulation for meshfree methods: This talk introduces various formulations for meshfree methods for solid and fluid mechanics problems, including Strong, Weak and Weakened Weak (W2) formulations. The focus will on the so-called weakened weak (W2) formulation will be presented that guarantees stable and convergent solutions, in comparison with the strong and weak formulations. We then present a family of W2 models known as S-PIM and S-FEM. Properties of this class of methods important for automations in computation will be discussed including: 1) spatial and temporal stability and convergence; 2) softening effects induced by various types of smoothing domains; 3) upper bound properties leading to certified solutions real-time computational models; 3) insensitivity to the quality of mesh allowing effective uses of triangular/tetrahedral meshes best suited for adaptive analyses. 

Applications: Examples will be presented for simulating engineered material behavior at various extreme situations, fluid structural interaction problems (helicopter blades interacting with subsonic airflows), inverse identification of material properties and cracks in engineering aerospace structural systems, crystal plasticity for metallic polycrystalline used in jet engines, and integrity assessment of systems via inverse analysis with real-time computation.   

Rabczuk  Prof. Dr.-Ing. Timon Rabczuk
  Chair of Computational Mechanics
  Bauhaus University Weimar
  Marienstrasse 15
  99423 Weimar, Germany
  Phone: +49-(0)3643-584511
  Fax: +49-(0)3643-584514

  Curriculum vitae

 Dual-Horizon Peridynamics
A dual-horizon peridynamics (DH-PD) formulation is presented that naturally includes varying horizon sizes and completely solves the ”ghost force” issue. Therefore, the concept of dual-horizon is introduced to consider the unbalanced interactions between the particles with different horizon sizes. The present formulation fulfills both the balances of linear momentum and angular momentum exactly. Neither the "partial stress tensor" nor the "slice" technique are needed to ameliorate the ghost force issue. We will show that the traditional peridynamics can be derived as a special case of the present DHPD.
All three peridynamic formulations, namely bond based, ordinary state based and non-ordinary state based peridynamics can be implemented within the DH-PD framework. Our DH-PD formulation allows for h-adaptivity and can be implemented in any existing peridynamics code with minimal changes. A simple adaptive refinement procedure is proposed reducing the computational cost. Both two- and three- dimensional examples including the Kalthoff-Winkler experiment and plate with branching cracks are tested to demonstrate the capability of the method.

Z Chen  Prof. Zhen Chen
  Department of Civil and Environmental Engineering 
  University of Missouri, USA
  Faculty of Vehicle Engineering and Mechanics
  Dalian University of Technology, China

  Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

  Curriculum vitae



Recent Advances in MPM-Based Particle Simulation of Multi-scale and/or Multi-physical Phenomena

To better simulate multi-phase (solid-liquid-gas) interactions involving failure evolution subject to extreme loading conditions, such as impact, penetration and explosion problems, the Material Point Method (MPM, has evolved for more than twenty years. Recently, the multi-scale material point method (Multi-MPM) is being developed to formulate the equation of state for certain type of energetic composites, in which molecular dynamics at nanoscale and dissipative particle dynamics at mesoscale might be concurrently handled in a single computational domain within the framework of the original MPM at microscale. On the other hand, a generalized interpolation material point method (GIMP) for simulating coupled thermo-mechanical processes is being developed based on the weak formulations of both conservation of momentum and conservation of energy so that the multi-physical phenomena under extreme loadings could be simulated to advance the additive manufacturing technology. Since it remains to be a challenging task to effectively describe both multi-scale and multi-physical phenomena in a single computational domain, recent research efforts, such as combined MPM and discrete element method, and combined MPM and smooth particle hydrodynamics, are being made to take advantages of different spatial discretization schemes. Recent findings and future research directions will be discussed in the conference.


  北京 100084

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极端变形问题(如超高速碰撞、冲击爆炸、金属加工成型、边坡失效、液体晃动等)是一个几何、材料和边界条件均为非线性的多物理场强耦合问题,涉及高速、高压、高温、相变和化学反应,气体、液体和固体等多种物质间相互耦合甚至混合,材料发生严重扭曲、破碎、融化甚至汽化。在求解此类问题时,拉格朗日有限元法存在网格畸变困难,且难以有效地模拟材料的破碎、融化和汽化等行为。欧拉法虽不存网格畸变问题,但难以准确处理材料界面,且非线性对流项也会导致数值求解困难。针对拉格朗日有限元法的这一缺陷,国际上近20年来兴起了无网格法和粒子类方法的研究热潮,提出了几十种新方法。物质点法(Material Point Method, MPM)有效地综合了拉格朗日法和欧拉法的优点,是冲击爆炸等极端变形问题数值分析的一种有效方法。

本课题组近年来致力于冲击爆炸等极端变形问题的数值模拟方法和软件研究,先后建立了物质点法的高效实现方案、改进的物质点接触算法、自适应物质点法、并行物质点算法、物质点有限元法、杂交物质点有限元法、耦合物质点有限元法、自适应物质点有限元法、物质点有限差分法等,并在算法研究的基础上,基于C++、Qt、VTK、CMake、OpenMP和MPI开发了可运行于Windows、Linux和Mac OS等多种平台上的三维显式并行物质点法数值仿真软件MPM3D®,应用于超高速碰撞、侵彻、爆炸、边坡失效、金属切削、流固耦合等问题中。本报告将简要介绍本课题组近年来针对极端变形问题在算法、软件和应用面的研究工作和成果。 


DD Wang   王东东教授
   厦门 361005






 MB Liu 刘谋斌教授
  北京 100871






ZH Yao  姚振汉 教授
  北京 100084








Z Zhuang  庄茁 教授
  北京 100084






ZH Yao  章青教授
  南京 210098