An energy‐momentum space‐time discretization of a constrained micropolar continuum for 3D fiber‐reinforced composites
An energy‐momentum space‐time discretization of a constrained micropolar continuum for 3D fiber‐reinforced composites
复制标题
3D 纤维增强复合材料约束微极性连续体的能量动量时空离散
DOI:
10.1002/pamm.202000002
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Röbiger C.
中科院分区:
文献类型:
--
作者:
Groß M;Dietzsch J;Röbiger C.
In 2D fiber‐reinforced composites, single fibers with a diameter in the range of micrometers are embedded in a matrix material. 3D fiber‐reinforced composites consist of fiber bundles (rovings) with diameters of millimeters. Therefore, 3D fiber‐reinforced composites require an extended material modelling, because a fiber bundle has to be considered as a beam‐like structure with curvature‐twist (twisting and bending) stiffness. By means of an extended continuum formulation, we modell a micro inertia and a curvature‐twist stiffness. We introduce these secondary effects by means of independent drilling degrees of freedom. The resulting constrained micropolar continuum is derived by a mixed principle of virtual power. In the discrete setting, this variational principle generates a mixed B‐bar method and an energy‐momentum scheme. We show transient numerical examples, which demonstrate the effect of micro inertia as well as the twisting and bending stiffness of the fiber bundles.
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
Sven Klinkel;C. Sansour;W. Wagner
通讯作者:
W. Wagner
影响因子:
7.2
作者:
M. Groß;J. Dietzsch;C. Röbiger
通讯作者:
C. Röbiger