Surface Smoothing Procedures in Computational Contact Mechanics

A Surface-to-Surface Finite Element Algorithm for Large Deformation Frictional Contact in febio

“…When a contact surface between two bodies is subjected to a spatially constant stress field, this stress field should be exactly transmitted from one body to another [24], as any variations in the stress at the interface are due to errors in the formulation employed. In this study, we perform the patch test proposed by Neto et al [37]. Two cubes of identical geometry and material properties are pressed against each other under frictionless conditions ( Fig.…”

“…Segmentto-segment algorithms [25,26], introduced to enforce constraints in an approximate sense in an effort to remedy errors associated with NTS algorithms, led to development of the mortar method [27][28][29][30][31][32][33][34][35]. An alternative approach has been the development of contact smoothing algorithms [36,37], which attempt to provide tangent plane continuity between adjacent segments, thus mitigating the errors associated with discretization at the cost of computational efficiency. More recently, the concept of isogeometric contact was proposed by Hughes et al [38], which adopts the shape functions of 3D modeling software for contact analyses to obtain a smoother description of the contact interface.…”

Study on the influence of orthotropy and tension–compression asymmetry of metal sheets in springback and formability predictions

“…All numerical simulations were performed with the in-house finite element code DD3IMP [5], assuming that the forming tools are rigid and described with Nagata patches [6]. The Coulomb friction law is adopted considering a constant value for the friction coefficient of 0.15, as recommended by the benchmark committee.…”

Study of the frictional contact conditions in the hole expansion test

“…The finite element simulations were performed with the in-house finite element code DD3IMP [6], assuming that the forming tools are rigid [7]. The study is focused on the influence of the friction conditions at the interface between the blank and the punch.…”