Slow crack growth, its modeling and crack-layer approach: A review

Chudnovsky, A.

doi:10.1016/j.ijengsci.2014.05.015

Cited by 51 publications

(10 citation statements)

References 31 publications

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“…Crack propagation rate is commonly expressed as a function of KI or it equivalent partner energy release rate (G) [208]. It is revealed that different crack behavior can be predicted under variable loading conditions that include "crack driving force" (e.g., KI, G, or J) and crack stability [262,263].…”

Section: Resistance To Crackmentioning

confidence: 99%

“…Often, these separations occur by propagation of one crack or several cracks through the material. Fracture analysis, in its most general interpretation, comprises all modes of failure, including buckling, large deformation and rupture (ductile fracture), failure due to a distributed damage growth, as well as a brittle fracture[208].Figure 9, shows an example of different fracture mechanisms that can be classified according to their starting point and progression.…”

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confidence: 99%

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Cracks, microcracks and fracture in polymer structures: Formation, detection, autonomic repair

Awaja

Zhang

Tripathi

et al. 2016

Progress in Materials Science

267

116

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Polymers and polymer composites are susceptible to premature failure due to the formation of cracks and microcracks during their service time. Evolution of cracks and microcracks could induce catastrophic material failure. Therefore, the detection/diagnostics and effective repair of cracks and microcracks are vital for ensuring the performance reliability, cost effectiveness and safety for polymer structures. Cracks and microcracks, however, are difficult to detect and often repair processes are complex. Biologically inspired self-healing polymer systems with inherent ability to repair damage have the potential to autonomically repair cracks and microcracks. This article is a review on the latest developments on the topics of cracks and microcracks initiation and propagation in polymer structures and it discusses the current techniques for detection and 2 observation. Furthermore, cracks and microcrack repair through bio-mimetic self-healing techniques is discussed along with surface active protection. A separate section is dedicated to fracture analysis and discusses in details Fracture mechanics and formation.

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Section: Resistance To Crackmentioning

confidence: 99%

mentioning

confidence: 99%

Cracks, microcracks and fracture in polymer structures: Formation, detection, autonomic repair

Awaja

Zhang

Tripathi

et al. 2016

Progress in Materials Science

267

116

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“…In order to identify crack path, additional branching criteria whose choice are still unsettled have to be considered. Accounting for scale effects in LEFM is also challenging, as illustrated by the following example: Consider a reference structure of unit size rescaled by a factor L. The critical loading at the onset of fracture scales then as 1/ √ L, leading to a infinite nucleation load as the structure size approaches 0, which is inconsistent with experimental observation for small structures [10,55,30].…”

Section: Introductionmentioning

confidence: 99%

Crack nucleation in variational phase-field models of brittle fracture

Tanné

Bourdin

et al. 2018

Journal of the Mechanics and Physics of Solids

443

264

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Phase-field models, sometimes refered to as gradient damage or smeared crack models, are widely used methods for the numerical simulation of crack propagation in brittle materials. Theoretical results and numerical evidences show that they can predict the propagation of a pre-existing crack according to Griffith' criterion. For a one-dimensional problem, it has been shown that they can predict nucleation upon a critical stress, provided that regularization parameter be identified with the material's internal or characteristic length. In this article, we draw on numerical simulations to study crack nucleation in commonly encountered geometries for which closed-form solutions are not available. We use U-and V-notches to show that the nucleation load varies smoothly from that predicted by a strength criterion to that of a toughness criterion, when the strength of the stress concentration or singularity varies. We present validation and verifications numerical simulations for both types of geometries. We consider the problem of an elliptic cavity in an infinite or elongated domain to show that variational phase field models properly account for structural and material size effects. We conclude that variational phase-field models can accurately predict crack nucleation through energy minimization in a nonlinear damage model instead of introducing ad-hoc criteria.

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“…Recently, the estimation of crack propagation has received significant attention due to its practical importance for the precise condition assessment of complex structures under random load [1][2][3]. While, there are many factors that affect the precise estimation result of crack propagation for structure under working condition, mainly includes of structure factor, stress ratio, loading type, manufacturing processing method, etc.…”

Section: Introductionmentioning

confidence: 99%