基于TEAM P21三维杂散场问题建模仿真与验证

TEAM Problem 21,作为国际计算电磁学会(international compumag society)旗下用于测试电磁分析方法和软件的系列基准问题(benchmark problem)之一于1993年11月由作者团队提出。本文扼要回顾Problem 21的工业和计算电磁学背景以及持续升级的进程,系统总结基于Problem 21的建模和仿真研究以及所取得的测量和数值计算的主要结果,重点介绍Problem 21基准族结合工业应用需求的新进展。

A Simulation Software for the Prediction of Thermal and Mechanical Properties of Wood Plastic Composites

Modelling and simulation has become an important tool in research and development. Simulation models are used to develop better understanding of the internal properties and impact of various parameters on the final quality of the product or process. Simulation model reduces the number of experiments and saves the wastage of material, time and money and are widely used in automobile industry, aircrafts manufacturing, process engineering, training for military, health care sector and many more. Wood Plastic Composite （WPC） is a bio-composite made by mixing wood fibers and plastic granules together at high temperature by compression molding or injection molding. A large quantity of WPC is rejected due to poor quality and low mechanical strength. There is a need to improve the understanding of the wood plastic composites, with both theoretical and experimental analysis. The impact of various parameters and processing conditions on the final product is not known to the industry people, due to less simulation models in this field. A new simulation software WPC Soft is developed to predict the mechanical and thermal properties of WPC. The software can predict the mechanical and thermal properties of WPC. The simulation results were validated with the experimental results and it was observed that the predicted values are quite close to the experimental values and with the further refining of the model, prediction can be further improved. The present simulation software can be easily used by the industry people and it requires very little knowledge of computers or modeling for its operation.

Fabrication of lightweight 3D interpenetrated NiTi@Mg composite with superior bending properties

A NiTi@Mg interpenetrating phase composite with high strength and lightweight was prepared by additive manufacturing(AM)and infiltration technology,and the interface bonding,three-point bending properties and cyclic compressive properties of NiTi@Mg composites were investigated.The results show that the metallurgically bonded interface is formed at the NiTi/Mg interfaces.The bending strength and compressive strength of the NiTi@Mg composite are 2.5 and 1.7 times higher than those of the NiTi scaffold,respectively.During the bending deformation process,a large number of dislocations are observed to accumulate in the soft Mg area at the interface.Furthermore,the finite element model showed that the stress accumulation area,where the bending crack is initiated,is located at the interface of NiTi and Mg.The strengthening mechanism of NiTi@Mg composites is attributed to the twinning strengthening of Mg and heterogeneous structure strengthening.

A brief review on ?-zirconium phosphate intercalation compounds and nano-composites

The layer structured zirconium phosphate （ZrP） can be intercalated with atoms, molecules, small organic groups and even polymers. The structures and properties of the ZrP intercalation compounds can be deliberately tuned, leading to promising potential applications in many fields. This article provides a brief review on the experimental results of the ZrP intercalation compounds, with the focus on the polymer/α-zirconium phosphate （α-ZrP） nano-composites. The computer simulations of the ZrP intercalation compounds at the atomic level play a significant role in designing and understanding the properties of ZrP, and in the promotion of the applications of compounds.