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Ultrasonic Fatigue Testing in the Tension-Compression Mode
Published on: March 7, 2018
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关于由外部WAAM制造的圆柱体组件疲劳曲强度的研究
Van-Minh Nguyen1, Pham Son Minh1, Dang Thu Thi Phan1
1Faculty of Mechanical Engineering, HCMC University of Technology and Education, Ho Chi Minh City 71307, Vietnam.
Materials (Basel, Switzerland)
|October 29, 2025
概括
这项研究优化了电缆弧增材制造 (WAAM) 参数,以提高圆柱体组件的疲劳曲强度. 样品尺寸直径和接电流等关键因素显著改善了疲劳寿命,接近传统制造性能.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 制造过程 制造过程 制造过程
背景情况:
- 增材制造 (AM),特别是电弧增材制造 (WAAM),为生产复杂金属组件提供了潜力.
- 了解和优化WAAM组件的疲劳性能对于其广泛的工业采用至关重要.
- 疲劳曲强度是结构完整性的关键参数,但它仍然是AM材料的挑战.
研究的目的:
- 研究和优化影响WAAM生产的圆柱形组件疲劳曲强度的接参数.
- 确定影响疲劳寿命的主导参数,并建立最大化疲劳周期 (N) 平均值的最佳设置.
- 将WAAM组件的疲劳性能与传统制造方法进行比较.
主要方法:
- 采用Taguchi L25直角阵列设计,系统评估五个接参数:接电流,偏移距离,步长,接速度和样品尺寸直径.
- 信号与噪声 (S/N) 比率被用来确定最大化疲劳周期 (N) 的最佳参数设置.
- 进行了变量分析 (ANOVA) 和线性回归分析,以确定显著参数并建模疲劳强度.
主要成果:
- 标本尺径 (17毫米) 和接电流 (125A) 被确定为影响疲劳强度的最主要因素,约占差异的75%.
- 最佳设置预测疲劳寿命为35万至38万个周期,代表22%至33%的改善.
- WAAM元件的疲劳性能达到传统制造部件的80-90%,其中10-20%的差距归因于微观结构差异.
结论:
- 该研究成功优化了WAAM参数,显著提高了疲劳曲强度.
- 建议进行后处理和应用安全因子 (大约1.2),以弥合与传统制造业的性能差距.
- 建议使用更大的数据集或非线性模型进行进一步的研究,以减轻在线性回归分析中观察到的过拟合问题.
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