Hyldahl, Per4; Mikkola, Aki M.3; Balling, Ole4; Sopanen, Jussi T.3
1 Aarhus University2 Department of Engineering - Machine Design, Department of Engineering, Science and Technology, Aarhus University3 Department of Mechanical Engineering4 Department of Engineering - Machine Design, Department of Engineering, Science and Technology, Aarhus University
The absolute nodal coordinate formulation (ANCF) is characterized by being developed specifically for dynamic analysis of large deformation problems. The objective of the study is to investigate how the shape of the initial mesh configuration influences the obtained numerical solution. After a thorough review of three available formulations, they are used in three different convergence studies. Initially a reference study is conducted to determine how the ANCF performs in an uniform and rectangular mesh. Subsequently, the ANCF methods sensitivity to irregular mesh is investigated and finally, the ability of the ANCF method to describe curved structures is evaluated. This study concludes that thin ANCF shell elements are sensitive to both the initial shape and their loading condition. Furthermore, both the initial configuration and the loading condition affect how the ANCF-based models converge. It is suggested that models containing thin ANCF shell elements are subjected to extensive validation studies, before they are used in a design process.
Nonlinear Dynamics, 2014, p. 1277-1291
Absolute nodal coordinate formulation; Flexible multibody dynamics; Large deformation; Thin shell elements