摘要
选用三种汽轮机叶片材料,对室温旋转弯曲疲劳试验常用的圆柱形试样和漏斗形试样分别进行了旋转弯曲疲劳试验,对两种形状试样的试验结果进行了对比分析。提出了试样形状系数的概念,由试验结果可得漏斗形试样和圆柱形试样旋转弯曲疲劳强度的试样形状系数为1.1。分别概括了两种形状试样的疲劳强度与抗拉强度的关系式,并从应力和挠度两个方面对漏斗形试样的疲劳强度大于圆柱形试样的原因进行了分析。
Rotating bending fatigue tests had been done on cylindrical specimen and funnel specimen with three kinds of turbine materials at room temperature. The test results had been comparative analyzed. The concept of factor of specimen shape had been defined. The shape factor of specimen of endurance bending strength of the two shape specimen was 1.1. The relation equation of endurance bending strength and tensile strength of the different shape specimen were generalized respectively. The reasons that the endurance bending strength of funnel specimen lager than cylindrical specimen’s had been analyzed from stress and flections.
出处
《理化检验（物理分册）》
CAS
2010年第7期432-435,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
旋转弯曲疲劳试验
疲劳强度
试样形状系数
圆柱形试样
漏斗形试样
rotating bending fatigue test
fatigue strength
shape factor of specimen
cylindrical specimen
funnel specimen
