Topic
Paris' law
About: Paris' law is a research topic. Over the lifetime, 13815 publications have been published within this topic receiving 224818 citations. The topic is also known as: Paris-Erdogan law.
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TL;DR: In this paper, the effects of the environment and material variables on the crack growth process in alloy 718 are reviewed and analyzed on the basis of deformation characteristics in the crack tip region.
Abstract: Observations concerning the effects of the environment and material variables on the crack growth process in alloy 718 are reviewed and analyzed on the basis of deformation characteristics in the crack tip region. The review of the role of material variables has focused on the effects of chemical composition and microstructure parameters including precipitate size and morphology as well as grain size and morphology. These analyses have suggested that the governing mechanism at the crack tip is the degree of homogeneity of plastic deformation and associated slip density. For conditions promoting homogeneous plastic deformation, with a high degree of slip density, the environmental damage contribution is shown to be limited, thus permitting the dominance of cyclic damage effects which are characterized by a transgranular crack growth mode and a lower crack growth rate. Under conditions leading to inhomogeneous plastic deformation and lower slip density the crack tip damage is described in terms of grain boundary oxidation and related intergranular fracture mode. Considering that the crack growth damage mechanism in alloy 718 ranges from fully cycle dependent to fully environment dependent, conflicting experimental observations under different operating conditions are examined and a sensitizing approach is suggested to increase the alloy resistance to environmental effects.
103 citations
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TL;DR: In this paper, a notched semi-circular bending (SCB) test was employed to study the fatigue cracking property for crumb rubber modified (CRM) asphalt mixture.
103 citations
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TL;DR: In this paper, a hybrid composite (CARALL) consisting of thin layers of carbon fiber/ epoxy prepreg sandwiched between aluminium sheets was developed, and it was shown that this class of materials offers higher modulus, higher tensile strength and lower density than 2024-T3 alloy in the longitudinal direction.
103 citations
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TL;DR: Roychowdhury et al. as discussed by the authors proposed a finite element study of plasticity-induced crack closure in the 3D small-scale yielding (SSY) model under mode I, constant amplitude cyclic loading with a ratio R=Kmin/Kmax.
103 citations
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TL;DR: In this paper, a Bayesian probabilistic methodology is presented to integrate model-based fatigue damage prognosis (FDP) with online and offline structural health monitoring (SHM) data.
103 citations