摘要:
加工成圆形横截面光滑试样,采用损伤力学理论,通过轴向不同应变幅控制的低周疲劳试验,研究了10CrNi5MoV高强钢的拉伸卸载模量、压缩卸载模量和循环弹性模量的损伤特性,结果表明:三个弹性模量的损伤特性,依赖于应变幅的大小,应变幅越大,三个模量的损伤均越快;在试样失效之前,三个弹性模量的损伤并无明显变化,只是在试样失效时,各自的损伤变量D才迅速趋向于1。研究结果为10CrNi5MoV高强钢的工程应用提供了参考。
Abstract:
Based on damage mechanical theory,through axial loading low cycle fatigue test controlled by different strain amplitudes adopting smooth rotundity-section specimens,damage characteristics of tensile-unloading modulus,compression-unloading modulus and cyclic elastic modulus of 10CrNi5MoV high strength steel were studied.The results manifested that damage of three types of elastic modulus depends on strain amplitudes and the higher the strain amplitude,the quicker damage of the three types of modulus.Before failure of the smooth specimen,damage of the three types of modulus had no obvious changes and just when the specimen failed,damage variable D of three types of elastic modulus tended to 1,which provides reference for engineering application of 10CrNi5MoV high strength steel.
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