Tuning spot weld models for vehicle body structural dynamics

Krank, BenjaminKTH,MWL Strukturakustik,MWL Material och strukturakustik (författare)

QC 20130111
Efforts focussing on modelling of spot welds in typical automotive structures have been spent during the last decades resulting in a number of different modelling techniques. One of the crucial aspects common to all these approaches is the difficulties related to the local complexity of the modelling of the actual connections. In order to handle this complexity, spot weld models are often dependent on parameters tuning their characteristics. This paper discusses the tuning of two different spot weld models with respect to certain parameters; the RBE3-Hexa-RBE3 model (also known as the ACM 2) and the Spider2 model available in the pre-processor Ansa. With the current trend towards increasingly refined finite element model meshes, current guide lines need to be updated and elaborated further in order to identify the best performing models. In this paper, model studies are discussed targeting tuning of spot weld parameters together with a new proposal for an exact method for updating the Young's modulus and density of isotropic shell structures analytically using an initial FE calculation.

Ingår i:Proceedings Of International Conference On Noise And Vibration Engineering (ISMA2012) / International Conference On Uncertainty In Structural Dynamics (USD2012): Katholieke Universiteit Leuven, s. 3915-39269789073802896

Av författaren/redakt...: Krank, Benjamin; Ohlsson, Ulrika; Hedlund, Anders; Nordström, Lars; Englund, Thomas; Göransson, Peter ...

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