| 孙家旺， 于培师， 张超锋， 赵军华.低屈服钢拉伸试验与数值研究[J].轻工机械,2018,36(2):6-10 |
| 低屈服钢拉伸试验与数值研究 |
| Tensile Test and Numerical Study of Low Yield Steel |
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| DOI：10.3969/j.issn.1005 2895.2018.02.002 |
| 中文关键词: 低屈服钢 拉伸试验 颈缩 真实应力 应变 断裂 扩展有限元法 |
| 英文关键词:low yield steel tensile test necking true stress strain fracture extended FEM(finite element method) |
| 基金项目:国家自然科学基金资助项目（11302067） |
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| 中文摘要: |
| 为了了解低屈服钢的拉伸性能，开展拉伸试验并进行数值研究:采用圆棒试件进行单轴拉伸试验，分析试件的力 位移曲线
、延展性以及断裂模式等；基于幂强化法和加权平均法计算材料颈缩后的真实应力 应变数据；采用扩展有限元方法对圆棒试件的拉伸、颈缩以及断裂过程进行
数值模拟。通过与试验数据的对比发现：加权平均法可以得到与实际相吻合的颈缩后的真实应力 应变数据；扩展有限元方法可以对低屈服钢的拉伸、颈缩与断
裂过程进行有效的仿真。 |
| 英文摘要: |
| The mechanical behavior of low yield steel under tensile loading was investigated by test and numerical analysis. First of all, the uniaxial tensile test
was carried out with the standard bar specimens, and the force displacement curve, ductility and fracture mode were analyzed. Secondly, the real stress strain data of material necking
were calculated by the power law and the weighted average method respectively. Finally, the extended finite element method was adopted to simulate the tests including the deformation,
necking and the fracture behavior of the specimen. By comparing with the experimental data, the real stress strain data after necking obtained by the weighted average method is consistent
with the actual test, which shows that the extended finite element method would be served as an efficient tool to simulate and predict the whole process of the uniaxial tensile behavior of low
yield steel. |
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