TY - EJOU AU - Peng, Xuan AU - Lian, Haojie TI - Numerical Aspects of Isogeometric Boundary Element Methods: (Nearly) Singular Quadrature, Trimmed NURBS and Surface Crack Modeling T2 - Computer Modeling in Engineering \& Sciences PY - 2022 VL - 130 IS - 1 SN - 1526-1506 AB - This work presents some numerical aspects of isogeometric boundary element methods (IGABEM). The behavior of hyper-singular and nearly-singular integration is first explored on the distorted NURBS surface. Several numerical treatments are proposed to enhance the quadrature in the framework of isogeometric analysis. Then a numerical implementation of IGABEM on the trimmed NURBS is detailed. Based on this idea, the surface crack problem is modeled incorporation with the phantom element method. The proposed method allows the crack to intersect with the boundary of the body while preserving the original parametrization of the NURBS-based CAD geometry. KW - Isogeometric analysis; trimmed NURBS; singular integration; boundary element method; surface crack DO - 10.32604/cmes.2022.017410