摘要
提出用分指数四项式拟合弹塑性材料的以应变表示应力的拉伸曲线．利用几个材料拉伸特征点的数据，就能获得全拉伸曲线的简单统一的表达式．与典型航空弹塑性材料的试验全拉伸曲线的对照表明，这种拟合模型具有很高的工程精度。
A new model of tensile curve fitting for elastic plastic materials by using a quadrinomial with fractional exponents is proposed,in terms of which a simple and expilcit repesentation of strain versus stress up to ultimate strength can be obtained by fitting several basic data of material characterisic.Lastly a comparison of the fitting curves with experimental curves for two typical aeronautical materials is made to demonstrate the efficiency and accuracy of the proposed model.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
1996年第5期591-594,共4页
Journal of Beijing University of Aeronautics and Astronautics
关键词
弹塑性
材料力学
应力-应变关系
elastic plastic
mechanics of materials
stress strain relation
fitting
