Topic
Vibration fatigue
About: Vibration fatigue is a research topic. Over the lifetime, 3460 publications have been published within this topic receiving 46297 citations.
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TL;DR: In this article, a coupled phenomenological micro-mechanical model of the early plastic fatigue damage initiation is introduced, which is based on the slip theory and on the localization homogenization technique associated with the self-consistent scheme.
Abstract: The fatigue life and the micro-damage heterogeneity for FCC polycrystalline metals are qualitatively evaluated employing a coupled phenomenological micro-mechanical model of the early plastic fatigue damage initiation. This model is based on the slip theory and on the localization homogenization technique associated with the self-consistent scheme. For representing the micro-damage on each slip system, an internal damage variable dS is introduced. The influence of the main parameters of this model (aggregate composition, damage interaction matrix Drs, and loading path) on the related plastic fatigue phenomena as the fatigue lives and the micro-damage heterogeneity is studied. Hence, various fatigue simulations are performed using several types of aggregates and different loading paths (simple and complex). It is shown that such parameters have great influences on the fatigue behavior. Moreover, the distributions of the local damage heterogeneity are studied under the effect of each determined parameter.
17 citations
TL;DR: In this paper, applied mechanics, measurement systems and structural engineering Reference IMAC-ARTICLE-1980-001 Record created on 2007-08-14, modified on 2016-08 -08
Abstract: Note: Applied mechanics, measurement systems and structural engineering Reference IMAC-ARTICLE-1980-001 Record created on 2007-08-14, modified on 2016-08-08
17 citations
TL;DR: In this article, an algorithm for the design of a single element (such as tensile member, rivet, bolt, weld, etc.) subjected to a stationary zero-mean random stress is presented.
Abstract: Stationary random (or stochastic) processes have been used as a statistical model for loading due to earthquakes, wind, ocean wave forces, and vehicle environments and motions. Given that the dynamic forces on an element are a random process, the designer is required to specify the size of the element such that it will maintain its structural integrity with specified probability and at the same time provide a minimum-cost, minimum-weight component. An algorithm for the design of a single element (such as tensile member, rivet, bolt, weld, etc.) subjected to a stationary zero-mean random stress is presented. Fatigue was considered to be the mode of failure. A fatigue model is developed which includes the possibility that the stress process can be either narrow- or wide-band. The design algorithm considers variability in the material properties and the geometry of the element as well as uncertainty in the RMS level of the applied stress.
17 citations
TL;DR: In this article, the application of the scanning laser vibrometer to monitor damage propagation of Carbon Fibre Reinforced Plastic (CFRP) components under vibration fatigue loading was explored.
Abstract: This research article proposes experimental methods for monitoring damage propagation of Carbon Fibre Reinforced Plastic (CFRP) components under vibration fatigue. High cycle fatigue (HCF) behaviour of composites is often not as dramatic as that of metal alloys, where any crack initiation might rapidly lead to failure. Instead, composites HCF behaviour is often a prolonged state of continuous degradation of the resin-to-fibre bonding. Furthermore, the interlaminar contact conditions at any opening delamination cause complex dynamic responses, which can be nonlinear and temperature dependent. Vibration fatigue is generally caused by large deformations which can be suitably measured by non-contact measurement systems. Hence, this paper explores the application of the scanning laser vibrometer to monitor damage propagation of CFRP components under vibration fatigue loading. The objective is to show how this measurement system can systematically implement a set of experimental methods aimed at monitoring the dynamic properties during the crack propagation caused by fatigue. The set of experimental techniques are autonomously executed by a custom-made control panel. A thermal camera is also part of the measurement chain and provides qualitative information about location of temperature hot spots and damage evolution.
17 citations
TL;DR: In this article, a more general and practical method for accelerated random vibration testing of transport packaging in the framework of linear random vibration of discrete packaged product is proposed, based on the response acceleration power spectral density (PSD) of component which is easy to measure and suitable for the different fatigue models more than Basquin fatigue model.
Abstract: Transport packaging of products is a complex structural system, having a variety of modes for vibration damage failure under the action of random vibration in logistics. In order to evaluate the packaging performance effectively, the accelerated random vibration testing becomes one of important tools. This paper develops a more general and practical method for accelerated random vibration testing of transport packaging in the framework of linear random vibration of discrete packaged product. The suggested method is based on the response acceleration power spectral density (PSD) of component which is easy to measure, and suitable for the different fatigue models more than Basquin fatigue model. It is confirmed by the experiments of a packaged desk computer that exerted two types of acceleration PSDs. Copyright © 2017 John Wiley & Sons, Ltd.
17 citations