Abstract
Under the frame of multibody dynamics, the contact dynamics of elasto-plastic spatial thin beams is numerically studied by using the spatial thin beam elements of absolute nodal coordinate formulation (ANCF). The internal force of the elasto-plastic spatial thin beam element is derived under the assumption that the plastic strain of the beam element depends only on its longitudinal deformation. A new body-fixed local coordinate system is introduced into the spatial thin beam element of ANCF for efficient contact detection in the contact dynamics simulation. The linear isotropic hardening constitutive law is used to describe the elasto-plastic deformation of beam material, and the classical return mapping algorithm is adopted to evaluate the plastic strains. A multi-zone contact approach of thin beams previously proposed by the authors is also introduced to detect the multiple contact zones of beams accurately, and the penalty method is used to compute the normal contact force of thin beams in contact. Four numerical examples are given to demonstrate the applicability and effectiveness of the proposed elasto-plastic spatial thin beam element of ANCF for flexible multibody system dynamics.
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This work was supported in part by the National Natural Science Foundation of China (Grants 11290151 and 11221202). It was also supported in part by the Beijing Higher Education Young Elite Teacher Project (Grant YETP1201).
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Wang, QT., Tian, Q. & Hu, HY. Contact dynamics of elasto-plastic thin beams simulated via absolute nodal coordinate formulation. Acta Mech. Sin. 32, 525–534 (2016). https://doi.org/10.1007/s10409-015-0533-3
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DOI: https://doi.org/10.1007/s10409-015-0533-3