3-D network model and its parameter calibration |
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Authors: | Liu Xiaoyu Liang Naigang and Li Min |
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Institution: | State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China |
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Abstract: | A material model, whose framework is parallel spring-bundles oriented in 3-D space, is proposed. Based on a discussion of
the discrete schemes and optimum discretization of the solid angles, a 3-D network cell consisted of one-dimensional components
is developed with its geometrical and physical parameters calibrated. It is proved that the 3-D network model is able to exactly
simulate materials with arbitrary Poisson ratio from 0 to 1/2, breaking through the limit that the previous models in the
literature are only suitable for materials with Poisson ratio from 0 to 1/3. A simplified model is also proposed to realize
high computation accuracy within low computation cost. Examples demonstrate that the 3-D network model has particular superiority
in the simulation of short-fiber reinforced composites. |
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Keywords: | strain energy stiffness modulus orientation component network model poisson ratio |
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