The Jinan Jiluo Road Crossing the Yellow River Tunnel North Extension Project will intersect Queshan reservoir, which currently supplies 60% of domestic water in City. During excavation process large-diameter slurry type shield used this project, it may lead to fracturing stratum front face and blow-out from surface if support pressure is too high. leakage pollute reservoir water, safety be thr...

This research presents a novel algorithm for robust topology optimization of continuous structures under material and loading uncertainties by combining an evolutionary structural (ESO) method with extended finite element (XFEM). Conventional approaches (e.g. ESO) often require additional post-processing to generate manufacturable smooth boundaries. By adopting the XFEM boundary representation ...

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 present paper aims to study the crack propagating behavior of a stiffened plate under tensile and bending displacement load loads. extended finite element method (XFEM) is used analyze residual ultimate strength plates with central crack. quasi-static growth process simulated by software ABAQUS. validity grid validated numerical comparing fatigue rate round compact tension specimen (RCT) re...

The analysis of adhesively bonded joints started in 1938 with the closed-form model of Volkersen. The equilibrium equation of a single lap joint led to a simple governing differential equation with a simple algebraic equation. However, if there is yielding of the adhesive and/or the adherends and substantial peeling is present, a more complex model is necessary. The more complete is an analysis...

A methodology to model arbitrary holes and material interfaces (inclusions) without meshing the internal boundaries is proposed. The numerical method couples the level set method (Osher and Sethian, 1988) to the eXtended Finite Element Method (X-FEM) (Mo es et al., 1999). In the X-FEM, the nite element approximation is enriched by additional functions through the notion of partition of unity. T...