TY - JOUR
T1 - Efficient Mode-Based Computational Approach for Jointed Structures
T2 - Joint interface modes
AU - Witteveen, Wolfgang
AU - Irschik, Hans
PY - 2009/1
Y1 - 2009/1
N2 - The mechanical response of complex elastic structures that are assembled of substructures is significantly influenced by joints such as bolted joints, spot-welded seams, adhesive-glued joints, and others. In this respect,computational techniques, which are based on the direct finite element method or on classical modal reduction
procedures, unfortunately show an inefficient balance between computation time and accuracy. In the present paper, a novel reduction method for the physical (nodal) joint interface degrees of freedom is presented, which we call joint interface modes. For the computation of the joint interface modes, Newton’s third law (principle of equivalence of
forces) across the joint is explicitly accounted for the mode generation. This leads to a dimension of the generalized joint interface degrees of freedom in the reduced system, which is a factor of 2 or more smaller than in conventional reduction methods, which do not consider Newton’s third law. Two different approaches for the computation of the
joint interface modes are presented. Numerical studies with bolted joints of different complexities are performed using a simple but representative constitutive joint model. It is demonstrated that the new joint-interface-mode formulation leads to both excellent accuracy and high computational efficiency.
AB - The mechanical response of complex elastic structures that are assembled of substructures is significantly influenced by joints such as bolted joints, spot-welded seams, adhesive-glued joints, and others. In this respect,computational techniques, which are based on the direct finite element method or on classical modal reduction
procedures, unfortunately show an inefficient balance between computation time and accuracy. In the present paper, a novel reduction method for the physical (nodal) joint interface degrees of freedom is presented, which we call joint interface modes. For the computation of the joint interface modes, Newton’s third law (principle of equivalence of
forces) across the joint is explicitly accounted for the mode generation. This leads to a dimension of the generalized joint interface degrees of freedom in the reduced system, which is a factor of 2 or more smaller than in conventional reduction methods, which do not consider Newton’s third law. Two different approaches for the computation of the
joint interface modes are presented. Numerical studies with bolted joints of different complexities are performed using a simple but representative constitutive joint model. It is demonstrated that the new joint-interface-mode formulation leads to both excellent accuracy and high computational efficiency.
UR - http://www.scopus.com/inward/record.url?scp=58149396445&partnerID=8YFLogxK
U2 - 10.2514/1.38436
DO - 10.2514/1.38436
M3 - Article
SN - 1533-385X
VL - 47
SP - 252
EP - 263
JO - AIAA Journal
JF - AIAA Journal
IS - 1
ER -