Journal ArticleDOI
Analysis of Fatigue Process of Rubber Vulcanizates
H. Hirakawa,F. Urano,M. Kida +2 more
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In this paper, the relationship between energy-input and hysteresis energy-loss during repeated deformation was analyzed, with gum and filled-rubber vuloanizates, and simple expressions, (4, and (5), were obtained for both the first deformation and after many cycles.Abstract:
The relationship between energy-input and hysteresis energy-loss during repeated deformation was analyzed, with gum and filled-rubber vuloanizates. It was recognized that the hysteresis energy-loss decreases more quickly with repeated deformation than the energy-input does. After a number of cycles both the energy-input and the energy-loss approach constant values. When these values are plotted against strain, curves similar in shape are obtained, regardless of the type of rubber. This is because the network chain is well relaxed. A group of the linear relationships between log W and log H was found with respect to N and λ. Examining the parameters, g1, g2, f1 and f2 as functions of N and λ, simple expressions, (4) and (5), were obtained for both the first deformation and after many cycles. At the latter state the hysteresis ratio tends to be constant in the wide range of λ. Finally, the relation between W and H at fatigue break is expressed with the same form of equation proposed by Grosch for t...read more
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Journal ArticleDOI
A literature survey on fatigue analysis approaches for rubber
William V. Mars,Ali Fatemi +1 more
TL;DR: This paper reviews analysis approaches that are currently available for predicting fatigue life in rubber and both crack nucleation and crack growth approaches are considered.
Journal ArticleDOI
Fatigue life estimation of an engine rubber mount
TL;DR: In this paper, a load-controlled fatigue test was conducted on three-dimensional dumbbell specimens at different levels of mean load, and it was shown that the maximum Green-Lagrange strain and the maximum strain energy density were proper damage parameters, taking the mean load effects into account.
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Fatigue and Mechanical Properties of NR/SBR and NR/NBR Blend Vulcanizates:
TL;DR: In this article, fatigue and mechanical failure tests have been performed to evaluate the behavior of blend vulcanizates of natural rubber/styrene butadiene rubber (NR/SBR) and NBR, and it has been found that the fatigue life and the strain energy varies linearly with blend composition in the compatible blend, but they deviate from linearity in the case of the incompatible blend.
Journal ArticleDOI
Fatigue life prediction of vulcanized natural rubber subjected to heat-aging
TL;DR: In this paper, a finite element analysis and fatigue damage parameter determined from fatigue test was used to predict the fatigue life of vulcanized natural rubber components, and the Green-Lagrange strain at the critical location determined from the finite element method was used for evaluating the fatigue damage parameters.
Journal ArticleDOI
Effect of holding time on high strain hysteresis loss of carbon black filled rubber vulcanizates
Kamal K. Kar,Anil K. Bhowmick +1 more
TL;DR: Hysteresis loss has been measured at constant stress and constant strain, at various holding times under tensile deformation of natural rubber (NR) and styrene-butadiene rubber (SBR) vulcanizates filled with various loadings of carbon black filler.