Discrete differential geometry and its role in computational modeling of defects and inelasticity
Discrete differential geometry and its role in computational modeling of defects and inelasticity
复制标题
离散微分几何及其在缺陷和非弹性计算建模中的作用
DOI:
10.1007/s11012-021-01335-1
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发表时间:
2021
期刊:
影响因子:
2.7
通讯作者:
Srinivasa, A. R.
中科院分区:
文献类型:
--
作者:
Srinivasa, A. R.
In this paper we discuss the geometry and mechanics of discrete manifolds—so called simplicial complexes that are essentially triangulated regions—motivated by the works on discrete exterior calculus and differential geometry in computer graphics. We show that the classical ideas related to the geometry of continuous manifolds, such as metric, curvature, and affine connections take on a much simpler and more intuitive aspect when discussed in the context of such discrete triangulated manifolds. We introduce the notion of a dual mesh to describe “dual” variables (technically differential forms). We use the dual mesh to show that the geometry of the defects such as microcracks, dislocations and incoherent boundaries as well as balance laws and constitutive relations can be introduced directly, without the need for “discretization” from a continuum. This opens up the possibility of direct simulations of these bodies without the need for a continuous counterpart. We end by demonstrating how the second law of thermodynamics can be used in such a situation including discrete non-local systems.
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DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
Keenan Crane
通讯作者:
Keenan Crane
DOI:
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发表时间:
1966
期刊:
Proceedings of the Royal Society of London. Series A, Mathematical and physical sciences
影响因子:
--
作者:
B. Bilby;L. Gardner;A. Grinberg;M. Zorawski
通讯作者:
M. Zorawski
DOI:
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发表时间:
1968
期刊:
影响因子:
--
作者:
B. Bilby
通讯作者:
B. Bilby
影响因子:
3.6
作者:
Andrejs E. Treibergs;A. Cherkaev;P. Krtolica
通讯作者:
P. Krtolica
DOI:
--
发表时间:
1948
期刊:
影响因子:
--
作者:
C. Eckart
通讯作者:
C. Eckart