Application of Fracture Mechanics to Micro and/or Macro Tribology Problem

断裂力学在微观和/或宏观摩擦学问题中的应用

• 批准号: 07305050
• 负责人: MURAKAMI Yukitaka
• 金额: $ 1.73万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07305050/
• 关键词: Tribology; Fracture Mechanics; Elastic-Plastic Analysis; Contact Stress; Residual Stress; Thermography; Inverse Problem; New Material

(1) Relationship between the temperature distribution and fatigue damage on a contact surface is investigated by an infrared thermography temperature measuring system. Although the sum of principal stresses, i.e.the first invariant of stress, on the contact surface is obtained using a thermography stress analyzer, it has not been thought that stress components can be resolved from the first invariant of stress. The head investigator theoretically constructs the basic conditions for the resolution of stress components and develops the technique to obtain the stress field in almost all practical cases where the first invariant of stress can be measured by a thermography stress analyzer.(2) Under heavy repeated rolling and/or sliding contact load, fatigue cracks grow in Mode II to a large extent. However, since it is very difficult to reproduce Mode II fatigue crack growth in a laboratory test, the threshold stress intensity factor range for Mode II of hard steels such as bearing steels, gear steels and roll steels has not been obtained. In this research, the new method to measure the threshold stress intensity factor range for Mode II of even hard steels in developed and ranges of bearing steels, gear steels and roll steels are measured. Consequently, it is made clear that the threshold stress intensity factor range for Mode II is larger than that for Mode I.(3) In order to elucidate the mechanism of contact fatigue in ceramics, which are expected to be used in severe conditions such as vacuum and/or high temperature, a fatigue test system of a ball-on-plate sliding contact is developed. The crack propagation from a preindentation of a Si_3N_4 plate is carefully observed and the crack growth behavior is analyzed by calculating the stress field under a ball-on-plate sliding contact.

(1)利用红外热像测温系统研究了接触面温度分布与疲劳损伤的关系。尽管使用热成像应力分析仪获得了接触表面上的主应力之和，即第一应力不变量，但尚未认为可以从第一应力不变量中解析出应力分量。首席研究员从理论上构建了应力分量解析的基本条件，并开发了在几乎所有实际情况下获得应力场的技术，其中应力第一不变量可以通过热成像应力分析仪测量。（2）在重的重复滚动和/或滑动接触载荷下，疲劳裂纹在很大程度上以模式II扩展。然而，由于在实验室试验中很难再现II型疲劳裂纹扩展，因此尚未获得轴承钢、齿轮钢和轧辊钢等硬钢的II型阈值应力强度因子范围。在本研究中，开发了测量甚至硬钢的II型阈值应力强度因子范围的新方法，并测量了轴承钢、齿轮钢和轧辊钢的范围。因此，可以清楚地看出，模式II的阈值应力强度因子范围大于模式I的阈值应力强度因子范围。(3)为了阐明预期在真空和/或高温等恶劣条件下使用的陶瓷的接触疲劳机理，开发了球板滑动接触疲劳测试系统。仔细观察Si_3N_4板预压痕处的裂纹扩展，并通过计算球板滑动接触下的应力场来分析裂纹扩展行为。

项目成果

S.Hamada・Y.Murakami: "New Measurement Method of Mode II Threshold Stress Intensity Factor Range ΔK_<tth> and Its Application" Proceedings of Asian Pacific Conference for Fracture and Strength'96. 831-836 (1996)

S. Hamada·Y.Murakami：“II型阈值应力强度因子范围ΔK_<tth>的新测量方法及其应用”亚太断裂与强度会议论文集96（1996）。

村上敬宜・吉村正昭: "赤外線画像解析法による全応力分離解析システムの確立" 日本機械学会論文集(A). 61巻591号. 2482-2488 (1995)

Takayoshi Murakami 和 Masaaki Yoshimura：“利用红外图像分析建立总应力分离分析系统”，日本机械工程学会会刊 (A)，第 61 卷，第 591 期。2482-2488 (1995)。

N.Hasebe・J.Qian・Y.Chen: "Fundamental Solutions for Half Plane with an Oblique Edge Crack" Engineering Analysis with Boundary Elements. 17. 263-267 (1996)

N.Hasebe・J.Qian・Y.Chen：“带有斜边裂纹的半平面的基本解决方案”边界元工程分析 17. 263-267 (1996)。

村上敬宜・栄中・市丸和恵・森田健敬: "ピッチング発生機構に関する実験的および破壊力学的研究(回転方向の逆転および駆動側円筒と従動側円筒の交換の影響)" 日本機械学会論文集(C). 62巻594号. 683-690 (1996)

Takayoshi Murakami、Einaka、Kazue Ichimaru 和 Takeyoshi Morita：“俯仰产生机制的实验和断裂力学研究（反转旋转方向和更换驱动和从动缸的效果）”日本机械工程师学会学报（C）。第 62 卷，第 594 期。683-690 (1996)

三好良夫・小倉敬二・木田勝之: "TiC被覆鋼およびTiN被覆鋼の転がり疲労損傷" 材料. 46巻1号. 77-83 (1997)

Yoshio Miyoshi、Keiji Ogura 和 Katsuyuki Kida：“TiC 涂层钢和 TiN 涂层钢的滚动疲劳损伤”材料，第 46 卷，第 1. 77-83 期（1997 年）。