Explicit FE-Formulation of Interphase Elements for Adhesive Joints

The potential of adhesive bonding to improve the crashworthiness of cars is attracting the automotive industry. Large-scale simulations are time consuming when using the very small finite elements needed to model adhesive joints using conventional techniques. In the present work, a 2D-interphase element formulation is developed and implemented in an explicit FE-code. A simplified joint serves as a test example to compare the interphase element with a straightforward continuum approach. A comparison shows the time-saving potential of the present formulation as compared to the conventional approach. Moreover, the interphase element formulation shows fast convergence and computer efficiency.

[1]  T. Andersson,et al.  On the effective constitutive properties of a thin adhesive layer loaded in peel , 2006 .

[2]  F. J. Mello,et al.  Modeling the Initiation and Growth of Delaminations in Composite Structures , 1996 .

[3]  Ulf Stigh,et al.  An explicit FE-model of impact fracture in an adhesive joint , 2007 .

[4]  René de Borst,et al.  Mesh-independent discrete numerical representations of cohesive-zone models , 2006 .

[5]  Wing Kam Liu,et al.  Nonlinear Finite Elements for Continua and Structures , 2000 .

[6]  A. Waas,et al.  Mixed-mode cohesive-zone models for fracture of an adhesively bonded polymer–matrix composite , 2006 .

[7]  U. Edlund,et al.  Analysis of elastic and elastic-plastic adhesive joints using a mathematical programming approach , 1990 .

[8]  Ulf Stigh,et al.  The stress–elongation relation for an adhesive layer loaded in peel using equilibrium of energetic forces , 2004 .

[9]  J. L. Högberg,et al.  A closed-form solution to statically indeterminate adhesive joint problems—exemplified on ELS-specimens , 2008 .

[10]  R. Cook,et al.  Concepts and Applications of Finite Element Analysis , 1974 .

[11]  U. Stigh.  Damage and crack growth analysis of the double cantilever beam specimen , 1988 .

[12]  Larsgunnar Nilsson,et al.  Simulating DCB, ENF and MMB experiments using shell elements and a cohesive zone model , 2004 .

[13]  Ulf Stigh,et al.  Shear behaviour of adhesive layers , 2007 .

[14]  K. V. Narasimha Rao,et al.  Simulation of Tire Dynamic Behavior Using Various Finite Element Techniques , 2007 .

[15]  K. Bathe.  Finite Element Procedures , 1995 .