An entropy-stable Smooth Particle Hydrodynamics algorithm for large strain thermo-elasticity
An entropy-stable Smooth Particle Hydrodynamics algorithm for large strain thermo-elasticity
复制标题
大应变热弹性的熵稳定平滑粒子流体动力学算法
DOI:
10.1016/j.cma.2021.113736
复制
发表时间:
2021
影响因子:
7.2
通讯作者:
Ghavamian A
中科院分区:
文献类型:
--
作者:
Ghavamian A
This paper presents a novel Smooth Particle Hydrodynamics computational framework for the simulation of large strain fast solid dynamics in thermo-elasticity. The formulation is based on the Total Lagrangian description of a system of first order conservation laws written in terms of the linear momentum, the triplet of deformation measures (also known as minors of the deformation gradient tensor) and the total energy of the system, extending thus the previous work carried out by some of the authors in the context of isothermal elasticity and elasto-plasticity (Lee et al., 2016; Lee et al., 2017; Lee et al., 2019). To ensure the stability (i.e. hyperbolicity) of the formulation from the continuum point of view, the internal energy density is expressed as a polyconvex combination of the triplet of deformation measures and the entropy density. Moreover, and to guarantee stability from the spatial discretisation point of view, consistently derived Riemann-based numerical dissipation is carefully introduced where local numerical entropy production is demonstrated via a novel technique in terms of the time rate of the so-calledballisticfree energy of the system. For completeness, an alternative and equally competitive formulation (in the case of smooth solutions), expressed in terms of the entropy density, is also implemented and compared. A series of numerical examples is presented in order to assess the applicability and robustness of the proposed formulations, where the Smooth Particle Hydrodynamics scheme is benchmarked against an alternative in-house Finite Volume Vertex Centred implementation.
登录
查看更多内容
影响因子:
--
作者:
O. Hassan;A. Ghavamian;C. H. Lee;A. J. Gil;J. Bonet;F. Auricchio
通讯作者:
F. Auricchio
影响因子:
2.9
作者:
P. Betsch;M. Schiebl
通讯作者:
M. Schiebl
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
Jibran Haider;C. H. Lee;A. J. Gil;J. Bonet
通讯作者:
J. Bonet
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
David Wagner
通讯作者:
David Wagner
影响因子:
4.1
作者:
Aguirre, Miquel;Gil, Antonio J.;Carreno, Aurelio Arranz
通讯作者:
Carreno, Aurelio Arranz