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首页> 外文期刊>Journal of thermal stresses >FATIGUE ANALYSIS OF FORGING DIE
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FATIGUE ANALYSIS OF FORGING DIE

机译:锻模的疲劳分析

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In the present study, the repeated forging experiments were conducted using the real forging machine. For supplement of the experiments, forging simulation was also conducted to evaluate the forging load vs. stroke relation during the forging process. Further, stress intensity factor K at the fatigue crack-tip initiated in the real forging tool was evaluated using the new method proposed in the present study. Conclusions obtained are summarized as follows: (1) The cracked portions found in both the real forging-die and -punch are places where the maximum equivalent stresses occur during the forging process; (2) the data (da/dN, K) evaluated for the real forging die and punch corresponds well with the experimental relation da/dN vs. K obtained in laboratory air; and (3) the proposed simulation method is useful for estimating lifetimes of the forging die and punch.
机译:在本研究中,使用真实的锻造机进行了重复的锻造实验。为了补充实验,还进行了锻造仿真,以评估锻造过程中锻造载荷与行程的关系。此外,使用本研究提出的新方法对在真实锻造工具中产生的疲劳裂纹尖端处的应力强度因子K进行了评估。得出的结论概括如下:(1)真实的锻模和-冲头中发现的裂纹部分是锻造过程中出现最大等效应力的地方; (2)对实际锻造模具和冲头评估的数据(da / dN,K)与实验室空气中da / dN与K的实验关系很好地吻合; (3)所提出的仿真方法对于估算锻模和冲头的寿命非常有用。

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