A geometric formulation of linear elasticity based on discrete exterior calculus
A geometric formulation of linear elasticity based on discrete exterior calculus
复制标题
基于离散外微积分的线弹性几何公式
DOI:
10.1016/j.ijsolstr.2021.111345
复制
发表时间:
2022
影响因子:
3.6
通讯作者:
Boom P
中科院分区:
文献类型:
--
作者:
Boom P
A direct formulation of linear elasticity of cell complexes based on discrete exterior calculus is presented. The primary unknowns are displacements, represented by a primal vector-valued 0-cochain. Displacement differences and internal forces are represented by a primal vector-valued 1-cochain and a dual vector-valued 2-cochain, respectively. The macroscopic constitutive relation is enforced at primal 0-cells with the help of musical isomorphisms mapping cochains to smooth fields and vice versa. The balance of linear momentum is established at primal 0-cells. The governing equations are solved as a Poisson’s equation with a non-local and non-diagonal material Hodge star. Numerical simulations of several classical problems with analytic solutions are presented to validate the formulation. Excellent agreement with known solutions is obtained. The formulation provides a method to calculate the relations between displacement differences and internal forces for any lattice structure, when the structure is required to follow a prescribed macroscopic elastic behaviour. This is also the first and critical step in developing formulations for dissipative processes in cell complexes.
DOI:
10.1109/piers.2016.7734512
发表时间:
2016
期刊:
2016 Progress in Electromagnetic Research Symposium (PIERS)
影响因子:
--
作者:
Shu C. Chen;W. Chew
通讯作者:
W. Chew
DOI:
10.1007/978-1-4614-7422-7
发表时间:
2013
期刊:
The American journal of physiology
影响因子:
--
作者:
E. Tonti
通讯作者:
E. Tonti
DOI:
10.12921/cmst.2004.10.02.147-160
发表时间:
2004
期刊:
computational methods in science and technology
影响因子:
--
作者:
E. Hadjigeorgiou;G. Stavroulakis
通讯作者:
G. Stavroulakis