Development and Performance Evaluation of a Block-Stiffened Fretting Fixture for Accurate Load Transfer in Fretting Tests

IF 1.8 4区工程技术 Q3 ENGINEERING, MECHANICAL

Experimental Techniques Pub Date : 2025-07-10 DOI:10.1007/s40799-025-00823-3

P. Bangaru, V. Kaliveeran, R.M. Raveesh, S. Kundapura

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引用次数: 0

Abstract

This study introduces a novel fretting fixture designed for fretting and full sliding tests, which minimizes recalibration and integrates multiple sensors for measuring contact tractions. The fixture features an additional “Z”-type supporting structure that enables horizontal chassis length adjustments and is compatible with various fatigue testing machines. Adjustable components, such as vertical stiffeners reinforced with rigid blocks, facilitate achieving the target Load Transfer Ratio (LTR) of 50%. The LTR can be adjusted by repositioning the rigid blocks using a bolt-nut assembly. The fretting tests are conducted with and without blocks attached to the vertical stiffeners. Finite Element Analysis (FEA) and experimental methods are employed to ealuate the LTR, yielding results of 59–60% and 58–59%, respectively. Supported by FEA and experimental validation, the fixture demonstrates effectiveness and reliability for fretting studies. The stiffened fretting fixture is evaluated under higher normal loads and increased frequencies, showing a notable increase in the Q/P ratio. This increase highlights intensified surface interaction and pronounced tribological effects.

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用于微动试验中精确载荷传递的块加筋微动夹具的研制与性能评价

本研究介绍了一种用于微动和全滑动测试的新型微动夹具，它最大限度地减少了重新校准，并集成了多个传感器来测量接触牵引力。夹具具有额外的“Z”型支撑结构，可以进行水平底盘长度调整，并与各种疲劳试验机兼容。可调节组件，如用刚性块加固的垂直加强筋，有助于实现50%的目标负载传递比（LTR）。LTR可以通过使用螺栓-螺母组件重新定位刚性块来调整。在竖直加劲筋上附着砌块和不附着砌块的情况下进行了微动试验。采用有限元分析（Finite Element Analysis， FEA）和实验方法对LTR进行评价，结果分别为59-60%和58-59%。通过有限元分析和实验验证，证明了该夹具用于微动研究的有效性和可靠性。在更高的正常载荷和增加的频率下，对加筋微动夹具进行了评估，显示出Q/P比的显着增加。这种增加突出了强化的表面相互作用和明显的摩擦学效应。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Experimental Techniques 工程技术-材料科学：表征与测试

CiteScore

3.50

自引率

6.20%

发文量

审稿时长

5.2 months

期刊介绍： Experimental Techniques is a bimonthly interdisciplinary publication of the Society for Experimental Mechanics focusing on the development, application and tutorial of experimental mechanics techniques. The purpose for Experimental Techniques is to promote pedagogical, technical and practical advancements in experimental mechanics while supporting the Society''s mission and commitment to interdisciplinary application, research and development, education, and active promotion of experimental methods to: - Increase the knowledge of physical phenomena - Further the understanding of the behavior of materials, structures, and systems - Provide the necessary physical observations necessary to improve and assess new analytical and computational approaches.