Topic
Fatigue limit
About: Fatigue limit is a research topic. Over the lifetime, 20489 publications have been published within this topic receiving 305744 citations. The topic is also known as: endurance limit & fatigue strength.
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TL;DR: In this article, the fatigue performance of AISI 304 subjected to shot peening (SP), ultrasonic nanocrystal surface modification (UNSM) and the combination of SP and UNSM processes was systematically assessed by rotary bending fatigue (RBF) tester at different stress levels.
Abstract: In this study, the fatigue performance of AISI 304 subjected to shot peening (SP), ultrasonic nanocrystal surface modification (UNSM) and the combination of SP + UNSM processes was systematically assessed by rotary bending fatigue (RBF) tester at different stress levels. The purpose of combining SP and UNSM processes is to find out whether SP following UNSM process can further improve the fatigue life of AISI 304 in comparison with the SP and UNSM processes alone. Interestingly, the fatigue strength of AISI 304 was deteriorated by the combination of SP + UNSM processes in comparison with the UNSM process alone, but the combination of SP + UNSM processes demonstrated a higher fatigue strength in comparison with the SP process alone.
81 citations
TL;DR: In this article, a finite element simulation of a structural component is presented in order to simulate defect influence on the fatigue strength in a multiaxial context, which can be used to define allowable defect size for industrial components.
81 citations
TL;DR: In this paper, the authors identify an environmentally clean coating process that will present lower influence in the Ti-6Al-4V fatigue strength, and evaluate the effect of this process on the fatigue life of TiN, CrN and WC:H.
81 citations
TL;DR: In this paper, three simplified models, namely a one-pit model, a sevenpit model and a pit-loop model, are proposed to calculate the stress concentration caused by shot-peening dents, and the forecasted results were verified by peening followed by fatigue tests on 40Cr steel.
Abstract: — In order to calculate the stress concentration caused by shot-peening dents, three simplified models, namely a one-pit model, a seven-pit model and a pit-loop model, are proposed in this paper. By using a finite element program for automatic dynamic incremental non-linear analysis, the stress concentration coefficients based on these models are calculated for different pit parameters and different stress fields. When considering the stress concentration and residual stress field produced by shot peening, a modified Goodman formula is proposed and used for forecasting the fatigue strength of peened specimens having the fatigue sources at the surface. The forecasted results were verified by peening followed by fatigue tests on 40Cr steel.
81 citations
TL;DR: In this article, an experimental study was conducted to examine the influence of cyclic loading on the interfacial properties of carbon fiber/epoxy resin composites using dynamic mechanical analysis (DMA) techniques.
Abstract: An experimental study was conducted to examine the influence of cyclic loading on the interfacial properties of carbon fibre/epoxy resin composites. Two composite material systems having the same fibres and epoxy matrix, but with different fibre surface treatments, oxidised/sized and untreated, respectively, were used in this study. The existence of different interphases in these materials was studied using dynamic mechanical analysis (DMA) techniques. Fatigue tests were conducted at various load levels and then by using DMA and C-scan techniques, the fibre/matrix interfacial degradation was characterised. The results indicated that cyclic fatigue loading did affect the fibre/matrix interfacial properties of the composite laminates. Specimens with oxidised/sized fibres showed less interfacial degradation compared to laminates with untreated fibres.
81 citations