| 利用小尺寸缺口试样测定延性材料的单轴本构关系 |
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| 引用本文： | 尹涛,蔡力勋,陈辉,包陈.利用小尺寸缺口试样测定延性材料的单轴本构关系[J].航空材料学报,2016(1):81-86. |
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| 作者姓名： | 尹涛 蔡力勋 陈辉 包陈 |
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| 作者单位： | 西南交通大学 力学与工程学院 应用力学与结构安全四川省重点实验室,成都,610031 |
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| 摘 要： | 提出了一种利用三点弯曲试样获取延性材料本构关系的测试方法：针对小尺寸缺口试样的三点弯曲线载荷-位移曲线，采用有限元辅助测试（Finite-element-analysis aided tests，FAT）方法，迭代获得材料代表性体积单元（Representative volume element，RVE）本构关系。研究表明，两种延性材料的有限元迭代反求结果和单轴拉伸试验结果吻合较好。应用该方法，可以采用小尺寸缺口试样来获取延性材料的本构关系。
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| 关 键 词： | FAT 方法 单轴本构关系 小尺寸试样 缺口试样 三点弯曲 |
Obtaining Uniaxial Constitutive Relationships of Ductile Materials by Using Small-scale Notched Bending Specimens |
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| Abstract: | A test method is proposed to obtain uniaxial constitutive relationships of ductile materials by using the small-scale bending specimens with a semi-circle notch.Linear load-displacement experimental curves of the specimens under three-point bending tests are taken as the iterative referenced target so that RVE (Representative volume element)uniaxial constitutive relationships of the ductile materials are obtained by the FAT (Finite-element-analysis aided tests)method.It is shown that the uniaxial constitutive relationships for two kinds of ductile materials by finite-element-analysis are in good agreement with the standard tensile results.Therefore,the method for the small-scale specimens can be conveniently used to get the uniaxial constitutive relationships for ductile materials. |
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| Keywords: | FAT method uniaxial constitutive relationship small-scale specimen notch specimen three point bending specimen |
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