Development of Triaxial Tension Creep Test Machine.
Development of Triaxial Tension Creep Test Machine.
复制标题
三轴拉伸蠕变试验机的研制。
DOI：
10.2472/jsms.46.1374
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
T. Tsurui
中科院分区：
文献类型：
--
作者：
S. Mukai;Y. Komatsu;D. Ueda;M. Sakane;M. Ohnami;T. Tsurui
本文介绍了三轴拉伸蠕变试验机的研制。该试验机可进行等轴拉伸蠕变试验，最大载荷为49KN，最高温度为923K。三维有限元（FE）弹性蠕变分析，以确定试样的形状和尺寸具有均匀的等三轴应力分布在试样中心。通过有限元分析确定的试样形状在缺口处具有2.0mm的凹槽半径。采用304型试件在923K下进行了等三轴拉伸蠕变试验。比较了304不锈钢在923K下的单轴、等双轴和等三轴拉伸蠕变寿命。蠕变断裂时间随J1（=σx+σy+σz）的增大而增大，正平均应力具有延长断裂时间的作用。在等三轴拉应力条件下，三个主应变ex、ey和ez均小于单轴拉应力和等双轴拉应力条件下的主应变。
This paper describes the development of triaxial tension creep machine. The developed machine can make equitriaxial tension creep experiments, and has a loading capacity of 49KN and the maximum temperature of 923K. Three dimensional finite element (FE) elastic-creep analyses were made to determine the shape and dimension of the specimen having uniform equi-triaxial stress distribution at the specimen center. The specimen shape determined by the FE analyses has 2.0mm groove radius at the notch. Equi-triaxial tension creep test was performed using Type 304 specimen at 923K. The uniaxial, equi-biaxial and equi-triaxial tension creep lives of Type 304 stainless steel at 923K were compared. Creep rupture time increased with increasing J1(=σx+σy+σz), so that the positive mean stress has an effect of increasing the rupture time. In the equi-triaxial tension stress condition, three principal strains of ex, ey and ez were smaller than in the uniaxial tension and equi-biaxial tension stressing conditions.