Investigation of the combined effect of notch and fretting on bending fatigue

IF 0.7 Q4 MECHANICS Theoretical and Applied Mechanics Pub Date : 2020-01-01 DOI:10.2298/tam191019002z
Quazi Md. Zobaer Shah, A. Kowser, M. Chowdhury
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引用次数: 3

Abstract

. Being a common phenomenon in failure mechanism, fretting fatigue has emerged as one of the major concerns in recent years both in research and industrial applications. In the present study, the effect of notch and fretting on bending fatigue has been examined by FEM analysis. Based on the available and validated FEM model, analyses have been carried out on single point fretting with a double notch and double point fretting with a single notch respectively. Along the predefined paths through the edge, thickness and notch, fatigue behavior and stress-strain distribution have been studied. It has been found that stress and strain distribution is uniformly spaced for constant fretting loads with a variable concentric load whereas variable fretting loads yield almost two times results. Stress and strain singularity is found for transverse loading when highly stressed. Peak stress was found on the stress distribution path for fretting action for the combined fretting and notch pres-ence. Fatigue life was influenced more drastically by variable fretting loads than variable concentric loadings only in case of tension. Dual action of fretting with notches was found more detrimental than the single action of double fretting/notching.
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缺口和微动对弯曲疲劳联合影响的研究
.作为一种常见的失效机制,微动疲劳已成为近年来研究和工业应用的热点之一。本文采用有限元方法研究了缺口和微动对弯曲疲劳的影响。基于现有的和验证过的有限元模型,分别对带双缺口的单点微动和带单缺口的双点微动进行分析。沿着预定的沿边缘、厚度和缺口的路径,研究了疲劳行为和应力-应变分布。研究发现,恒微动载荷与变同心载荷的应力应变分布是均匀间隔的,而变微动载荷的应力应变分布几乎是两倍的结果。在高应力条件下,横向加载存在应力应变奇异性。当微动和缺口同时存在时,在微动作用的应力分布路径上发现了峰值应力。变微动载荷对疲劳寿命的影响比变同心载荷对疲劳寿命的影响更大。有缺口的微动的双重作用比双微动/缺口的单一作用更有害。
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来源期刊
CiteScore
0.90
自引率
0.00%
发文量
4
审稿时长
32 weeks
期刊介绍: Theoretical and Applied Mechanics (TAM) invites submission of original scholarly work in all fields of theoretical and applied mechanics. TAM features selected high quality research articles that represent the broad spectrum of interest in mechanics.
期刊最新文献
Theoretical and Applied Mechanics Numerical simulation of nanofluid flow due to a stretchable rotating disk The behavior of a satellite trajectory near the equilibrium points of sun-earth system and its control Transmutation of central forces and Bertrand’s theorem Arbitrary decay for a nonlinear Euler-Bernoulli beam with neutral delay
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