文献类型：期刊文献

中文题名：三点弯拱形试样测量蠕变参数的理论分析

英文题名：THEORETICAL ANALYSIS OF CREEP PARAMETERS FROM THREE-POINT BENDING TESTS ON ARCH-SPECIMEN

作者：庄法坤[1];周帼彦[1];涂善东[1]

机构：[1]华东理工大学机械与动力工程学院承压系统与安全教育部重点实验室,上海200237

年份：2012

卷号：34

期号：6

起止页码：833

中文期刊名：机械强度

外文期刊名：Journal of Mechanical Strength

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金(50835003;10772067);上海市自然科学基金(09ZR1408000)资助项目~~

语种：中文

中文关键词：三点弯曲;拱形试样;蠕变性能参数;有限元法;P91

外文关键词：Three-point bending; Arch-specimen; Creep parameters; Finite element method; P91

摘要：基于三点弯试验方法,推导拱形试样蠕变性能参数的解析解,实现与传统单轴蠕变试验之间的等效转换,采用有限元方法模拟P91在600℃下的三点弯蠕变试验,根据模拟结果求得材料的蠕变参数,验证理论推导得到的蠕变性能参数的解析解的可用性和精度,并且分析压头直径、试样尺寸、摩擦因数、偏载对计算结果的影响,其中尺寸偏差、偏载对结果影响较为显著。
The analytical solutions of creep parameters of three-point bending arch-specimens are derived. The relationship between the three-point bending and uniaxial creep tests are established to allow the creep data conversion. Finite element simulation of the three-point bending creep test of P91 operated at constant load and temperature （600 ℃ ） are carried out. Based on the numerical results, the creep parameters are obtained and compared with the analytical results to validate the feasibility and accuracy of the proposed approach. The effects of indenter diameters, specimen sizes, friction coefficient and eccentric loading are also analyzed. It is found that the deviation of specimen sizes and eccentric loading have a significant influence on the measurement results.