Prediction on fatigue properties of the plain weave composite under broadband random loading

Abstract

In this paper, the fatigue properties of the plain weave composite subjected to broadband random loading are investigated. A prediction method is proposed to calculate the failure probability of the composite under random loading by combining the probability density function of the residual strength and the probability density function of the stress peaks. The stress randomness and the strength dispersity are both taken into account in the analysis of the residual strength and the failure probability curves. The fatigue life data of the plain weave composite under broadband random responses are obtained from the random vibration tests. The predicted results are in good agreement with the experiments.

Dirlik and Tovo-Benasciutti Spectral Methods in Vibration Fatigue: A Review with a Historical Perspective

“…Other examples with electronic devices [61,62] are discussed in the following section. Concerning composite materials, spectral based approaches attempt to reformulate strength criteria for composite materials (e.g., Tsai-Hill [63], residual strength, or stiffness model [64,65]) to extend their validity to the frequency domain for the case of random vibrations [66]. Even for metal/composite assemblies undergoing random vibrations, an example demonstrates how to combine finite element analysis with spectral methods successfully [67].…”

A new phenomenological creep residual strength model for the life prediction of the laminated composites

“…The mentioned advantages make the residual strength models suitable to be used in progressive fatigue damage modeling. [24][25][26] Since cyclic loading occurs in most applications, the majority of the models available in the literature are related to cyclic loading, [27][28][29][30] while the life and damage prediction under sustained load is less addressed. However, the fatigue cycles could be transformed into loading time with the relation t = f  N, where f is loading frequency and N is the number of cycles.…”

Comparative study of adhesive fatigue in aeronautical bonded joints: A numerical approach in the frequency domain

“…For stationary, Gaussian, and wideband processes, Dirlik's method is usually the preferred choice 12 and it has been shown to perform extremely well for metallic 13,14 and also (more recently) composite structures. 15 However, to the best of the authors' knowledge, it has not yet been applied to fatigue estimation of adhesively bonded joints.…”