多孔材料性能模型研究1:数理关系  

Study on property model for porous materials 1:mathematical relations

作　　者：刘培生 崔光 程伟 LIU Pei-sheng;CUI Guang;CHENG Wei(Key Laboratory of Beam Technology of Ministry of Education,College of Nuclear Science and Technology,Beijing Normal University,Beijing 100875,China)

机构地区：[1]北京师范大学核科学与技术学院射线束技术教育部重点实验室

出　　处：《材料工程》2019年第6期42-62,共21页Journal of Materials Engineering

基　　金：北京师范大学测试基金(C18)

摘　　要：三维网状多孔材料是一类优秀的工程材料,其用途覆盖能源、生物、航空航天、环境保护、交通运输等诸多领域。本文作者根据三维网状多孔材料的结构特征,提出了综合简化的八面体结构模型,并在此基础上获得了该材料的系列性能关系。本文综合介绍了该模型及此类材料的基本物理、力学性能数理关系,从单向拉伸到多向拉压,以及传导性能和比表面积等。对该简化结构模型的根源、特点等进行了比较全面的描述,同时与同类模型进行了对比分析,并对不同性能模型及其性能关系进行了逐一诠释,其中代表性的问题有多孔体承载时涉及的孔棱细梁假设、孔棱弯曲、承载单元约束力,以及拉压性能关系中涉及的修正系数、塑性指数取值等。经实验验证该模型具有良好的实用性。Three-dimensional reticulated porous materials are excellent engineering materials, and their application cover energy engineering, bioengineering, aerospace, environmental protection, transportation, etc . Author of this paper put forward a simplified structure model of octahedron based on the structural characteristics of these materials. On this basis, serial mathematical relations were obtained for their performance. This model and the related mathematical characterization of the basic physical and mechanical properties of this kind of materials,from unidirectional tension to multidirectional tension and compression,as well as conductivity and specific surface area were comprehensively introduced. The origin and characteristics of the simplified structural model were described comprehensively, and compared with other similar models;different property models and their relationships were explained one by one. Among them, the representative problems including the thin beams assumption of pore struts, the bending of pore struts and the restraint force of bearing units for the loaded porous body, and the correction coefficient and the plastic index value involved in the tension or/and compression relationship. The theoretical results were verified by the experiment of samples prepared in production line, which were well practicable.

关 键 词：多孔材料 性能模型 数理关系 

分 类 号：TB383[一般工业技术—材料科学与工程]