基于大范围应力三轴度的船用低碳钢断裂特性研究

发布时间：2018-03-17 01:09

  本文选题：多轴应力状态　切入点：船用钢　出处：《中国造船》2016年03期 　论文类型：期刊论文

【摘要】：基于有限元修正的平均应力三轴度值的方法,对缺口拉伸、纯剪切、压剪和单轴压缩等多种应力状态下的材料试样进行计算。应力三轴度从-0.33到1.33,涉及压缩、压剪、剪切、拉伸、多轴拉伸等多轴应力状态。最终拟合了两种计及应力三轴度损失的断裂准则,并通过Taylor杆撞击试验进行了仿真分析。结果表明:(1)舰用低碳钢的断裂应变与应力状态密切相关,且在不同的应力三轴度区间差异较大;(2)考虑应力三轴度影响的断裂准则能较好地预测船用低碳钢材料在复杂应力状态下的断裂行为。
[Abstract]:The average stress correction finite element method of three axis value based on notch tensile, shear, shear and uniaxial compression and other materials should be under stress of stress calculation. Three axis from -0.33 to 1.33, involving compression, shear, shear, tensile, multiaxial stretching etc. multi axial stress state. The final fitting two meter and three axis force fracture criterion of loss, and the simulation analysis is carried out through the Taylor bar impact test. The results showed that: (1) ship breaking strain of low carbon steel is closely related to the stress state, and the three axis force interval difference should be different the larger; (2) considering the effect of stress fracture criterion three axis can better predict the marine low carbon steel materials in the complex stress fracture behavior under stress.

【作者单位】： 武汉理工大学交通学院;海军装备研究院;
【基金】：国防基础研究项目(B1420133057) 国家自然科学基金(11302259) 非线性力学国家重点试验室开放基金(LNM201505) 中央高校基本科研业务费专项资金(2014-yb-20)
【分类号】：U668.2
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本文编号：1622474