Energy Dissipation Analysis of Bended SMA Bar in Isothermal State  

作　　者：彭刚 

机构地区：[1]China Three Gorges University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2004年第4期95-98,共4页武汉理工大学学报（材料科学英文版）

基　　金：FundedbyInvestigationofIntellectualizedSystemtoControlStructureVibrationBasedonArtificialNeuralNetwork(2 0 0 0B14 0 0 1)ofItemofTechnologyInnovateContributedbyHubeiProvinceEducationOffice

摘　　要：The theory calculation formula is deduced about stress distribution in cross section and changes in Martensite percentages with the section height of random section shape bar under the action of the bending moment according to the Brinson's Constitutive Relation.The bar's energy dissipation capability under circulation of bending moment was analyzed and the calculation theory was set up. By using MATLAB program and the numerical calculation for uniform rectangle cross section bar, the relationships among the maximal stress and strain on cross section edge with bend load, the stress and Martensite percent's with cross section height, the energy dissipation capability with cross section height, and the energy dissipation capability with maximal strain on cross section edge are gained, also those curves are discused. It is put forward that the SMA material can be used for passive structure vibration control to dissipate energy of bend load.The theory calculation formula is deduced about stress distribution in cross section and changes in Martensite percentages with the section height of random section shape bar under the action of the bending moment according to the Brinson's Constitutive Relation.The bar's energy dissipation capability under circulation of bending moment was analyzed and the calculation theory was set up. By using MATLAB program and the numerical calculation for uniform rectangle cross section bar, the relationships among the maximal stress and strain on cross section edge with bend load, the stress and Martensite percent's with cross section height, the energy dissipation capability with cross section height, and the energy dissipation capability with maximal strain on cross section edge are gained, also those curves are discused. It is put forward that the SMA material can be used for passive structure vibration control to dissipate energy of bend load.

关 键 词：shape memory alloys energy dissipation constitutive relation thermodynamics equation PSEUDO-ELASTICITY 

分 类 号：TG139.6[一般工业技术—材料科学与工程]