高速车轮钢材料疲劳裂纹扩展行为的近场动力学表征方法研究OA
Study on characterization method of fatigue crack propagation for high-speed wheel steel material using peridynamics
为准确表征高速车轮钢材料的疲劳裂纹扩展行为,通过引入适于解决断裂等不连续问题的近场动力学理论,建立了国产轧制高速车轮钢材料疲劳裂纹扩展行为的近场动力学表征方法.以国产轧制高速车轮钢为原料制备了紧凑拉伸试样,并开展了车轮轮辋材料疲劳裂纹扩展速率试验.根据材料裂纹扩展速率试验结果,通过参数反演方法确定了材料键疲劳失效条件,构建了高速车轮钢材料疲劳裂纹扩展的近场动力学表征模型.随后在不同加载条件下,通过试验与模拟结果的对比,验证了所建表征模型的正确性.研究结果表明,在最大荷载5.0 kN、载荷比0.1的循环加载条件下,根据紧凑拉伸试样裂纹扩展速率试验数据,结合模拟试样加载过程的近场动力学模型,反演得到了国产轧制高速车轮钢材料键疲劳失效条件,失效条件中的待定常数A和M分别为7.00×105和3.776 5.在此基础上将最大试验荷载增加至5.5 kN,获取紧凑拉伸试样在加载过程中的疲劳裂纹扩展试验数据,所得试验结果与近场动力学模拟结果非常吻合,验证了所提出的高速车轮钢材料键疲劳失效条件的正确性,从而实现了对高速车轮钢材料疲劳裂纹扩展行为的准确表征.研究成果为建立车轮部件材料的疲劳本构关系提供了参考,为进一步开展复杂荷载条件下车轮疲劳裂纹扩展研究提供了基础.
In order to study the fatigue crack propagation behavior of high-speed wheel steel material,the peridynamic theory,which is suitable for solving discontinuous problems such as fracture,was introduced,and a characterization method for the fatigue crack propagation of domestic rolled high-speed wheel steel material was established using peridynamics.Compact tensile specimens were prepared using domestic rolled high-speed wheel steel material,and fatigue crack propagation rate tests were conducted for the wheel rim material.Based on the test results of the material crack propagation rate,the material bond fatigue failure conditions were determined through a parameter inversion method,and a characterization model for the fatigue crack propagation of high-speed wheel steel material was constructed.Subsequently,the characterization model was validated by comparing the experimental and simulation results under different loading conditions.The results show that under the condition of a maximum load of 5.0 kN and a load ratio of 0.1,based on the crack propagation rate test results of compact tensile specimens and the loading simulation model,the undetermined constants in the fatigue failure conditions of domestic rolled high-speed wheel steel material bonds were inverted,and A and M values were obtained to be 7.00×105 and 3.776 5,respectively.On this basis,the maximum load was increased to 5.5 kN to obtain fatigue crack propagation test data of compact tensile specimens during the loading process.The experimental results obtained were in satisfactory agreement with the simulation results,verifying the correctness of the proposed bond fatigue failure conditions for high-speed wheel steel material.This achieves accurate characterization of the fatigue crack propagation behavior of high-speed wheel steel material.The research results provide references for establishing the fatigue constitutive relationship of wheel component materials and lay the foundation for further research on fatigue crack propagation of wheels under complex load conditions.
马晓川;王亚杰;任学冲;尹伟彬;赵培阳
华东交通大学 山区土木工程安全与韧性全国重点实验室,江西 南昌 330013华东交通大学 山区土木工程安全与韧性全国重点实验室,江西 南昌 330013北京科技大学 国家材料服役安全科学中心,北京 100083华东交通大学 山区土木工程安全与韧性全国重点实验室,江西 南昌 330013华东交通大学 山区土木工程安全与韧性全国重点实验室,江西 南昌 330013
交通工程
高速车轮钢材料近场动力学裂纹扩展表征方法失效
high-speed wheel steel materialperidynamicsfatigue fracturecharacterization methodfailure
《铁道科学与工程学报》 2026 (4)
1568-1577,10
国家自然科学基金资助项目(52108406,52368060)中国国家铁路集团有限公司科技研究开发计划实验室基础研究资助项目(L2021J004)江西省杰出青年基金资助项目(20232ACB214010)江西省双千计划人才资助项目(jxsq2023201084)
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