Multi-site damage (MSD) has been a challenge to aircraft, civil and power plant structures. In real life components are subjected to cracking at many vulnerable locations such as the bolt holes. However, we do not consider for the presence of multiple cracks. Unlike components with a single crack, these components are difficult to predict. When two cracks approach one another, their stress fiel...

In this paper, the stress intensity factor (SIF) variations along an arbitrarily developing crack front, the non-planar fatigue-crack growth patterns, and the fatigue life of a round bar with an initially straight-fronted surface crack, are studied by employing the 3D symmetric Galerkin boundary element method-finite element method (SGBEM-FEM) alternating method. Different loading cases, involv...

Abstract To comprehend the fatigue failure mechanism at fiber discontinuity in fiber-reinforced composites, it is necessary to evaluate local mechanical behaviors. The strength depends on stress distribution inclusion corner. An improved advanced finite element method (IAFEM) proposed for intensity factor (SIF) analysis In IAFEM, stiffness matrix of singular corner (SICE) obtained, and elastic ...

Flaws in material, appearing because of imperfections, manufacturing faults or severe service conditions, can easily threaten the structural integrity of engineering components. This is particularly dangerous when concerning equipment whose purpose is to protect larger systems, e.g. pressure safety valves (PSV) that protect pressure vessels and equipment of overpressure. Catastrophic consequenc...

The main objective of this work has been the validation a methodology to assess fatigue crack propagation in offshore mooring chains under service conditions. For purpose, analytical Stress Intensity Factor (SIF) solutions with step-by-step application Paris law and Extended Finite Element Method (XFEM) implemented Abaqus® 2018 software have studied. analysis is divided two stages. First, stati...

The stress values at the crack tip in bending reinforced concrete beams are considered. state is analytically determined with an initial and propagating crack. Equations of equilibrium a part beam cut along line compiled. These equations reduced to system two nonlinear algebraic using plane-sections hypothesis. determine zone’s height nominal for length. rest parameters expressed regarding zone...

We present a case of a 53-year-old woman with subchondral insufficiency fracture (SIF) of the femoral head without history of severe osteoporosis or overexertion. Plain radiographs showed acetabular overcoverage with excessive lateralization of the acetabular rim. A diagnosis of SIF was made by typical MRI findings of SIF. The lesion occurred at the antipodes of the extended rim. Increased mech...

Modern knowledge in the field of fracture mechanics is first key solving problems safety and strength objects with crack-like damages various origins. Nonlinear analysis stress-strain state crack tip region based on one- two-parameter approaches. The classical one-parameter studies involve study singular quantities, including a contour J -integral, independent path integration, stress intensity...

The stress distribution on the tip of the cracks and the stress intensity factor on them are the main courses in the fracture mechanic. The stress intensity factor of the cracks with the different load exited and the different geometry are listed in the tables of the standard books. In all of them, the cracks are located in the central point of the plates. In the uniform edge loaded case, the c...