Contact Modelling in Isogeometric Analysis: Application to Sheet Metal Forming Processes

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Cardoso, Rui P.R.^1 ; Adetoro, O.B.^2 ; Adan, D.^2

Department of Mechanical, Aerospace and Civil Engineering, Brunel University London, Uxbridge, London

UB8 3PH, United Kingdom^1

Department of Engineering Design and Mathematics, University of the West of England, Bristol

BS16 1QY, United Kingdom^2

关键词: Contact detection;    Contact modelling;    Convergence rates;    Discontinuous displacement;    Explicit time integration scheme;    Isogeometric analysis;    Non-uniform rational B-splines;    Parametric coordinates;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032123/pdf
DOI  :  10.1088/1742-6596/734/3/032123

来源: IOP

【 摘 要 】

Isogeometric Analysis (IGA) has been growing in popularity in the past few years essentially due to the extra flexibility it introduces with the use of higher degrees in the basis functions leading to higher convergence rates. IGA also offers the capability of easily reproducing discontinuous displacement and/or strain fields by just manipulating the multiplicity of the knot parametric coordinates. Another advantage of IGA is that it uses the Non-Uniform Rational B-Splines (NURBS) basis functions, that are very common in CAD solid modelling, and consequently it makes easier the transition from CAD models to numerical analysis. In this work it is explored the contact analysis in IGA for both implicit and explicit time integration schemes. Special focus will be given on contact search and contact detection techniques under NURBS patches for both the rigid tools and the deformed sheet blank.