Prediction of the Poisson's ratio of porous materials

1996 ◽  
Vol 31 (6) ◽  
pp. 1643-1646 ◽  
Author(s):  
M. Arnold ◽  
A. R. Boccaccini ◽  
G. Ondracek
Keyword(s):  
Porous Materials ◽  
Poisson’S Ratio ◽  
Poisson's Ratio

On Effective Mechanical Properties of Two-Dimensional Porous Materials

2020 ◽  
Vol 12 (04) ◽  
pp. 2050040
Author(s):  
Zaoyang Guo ◽  
Lei Wang ◽  
Xiaojun Guo ◽  
Yang Chen ◽  
Leiting Dong
Keyword(s):  
Porous Materials ◽  
Young’S Modulus ◽  
Poisson’S Ratio ◽  
Young's Modulus ◽  
Full Range ◽  
Theoretical Models ◽  
Poisson's Ratio ◽  
Analytical Models ◽  
Two Dimensional ◽  
Effective Mechanical Properties

Two-dimensional (2D) representative volume element (RVE) has been widely used to simulate the effective behaviors of the materials with aligned pores. In this paper, the anisotropy indexes are defined for the 2D RVE model to quantitatively evaluate the extent of anisotropy of the model. A normalized procedure is then proposed to compute the effective moduli of the RVE models, which can further minimize the influence of anisotropy of the RVE models. The effective Poisson’s ratio of the porous materials is challengeable to be estimated well, and few analytical models can give good predictions. The theoretical models are proposed to approach the effective Young’s modulus and the effective Poisson’s ratio of the 2D porous materials covering the full range of porosity. It is numerically validated that the theoretical models give accurate predictions for the effective Young’s modulus and Poisson’s ratio of the 2D porous materials.

scholarly journals Auxetic interpenetrating composites: A new approach to non-porous materials with a negative or zero Poisson’s ratio

2020 ◽  
Vol 243 ◽  
pp. 112195
Author(s):  
Zhengyang Zhang ◽  
Hanxing Zhu ◽  
Ru Yuan ◽  
Sanmin Wang ◽  
Tongxiang Fan ◽  
...  
Keyword(s):  
Porous Materials ◽  
Poisson’S Ratio ◽  
Poisson's Ratio ◽  
New Approach

The Model for Calculating Elastic Modulus and Poisson's Ratio of Coal Body

2013 ◽  
Vol 6 (1) ◽  
pp. 36-43 ◽  
Author(s):  
Ai Chi ◽  
Li Yuwei
Keyword(s):  
Elastic Modulus ◽  
Poisson’S Ratio ◽  
Fractured Rock ◽  
Rock Block ◽  
Poisson's Ratio ◽  
Linear Elastic ◽  
Study Results ◽  
The Face ◽  
Block Face ◽  
Coal Rock

Coal body is a type of fractured rock mass in which lots of cleat fractures developed. Its mechanical properties vary with the parametric variation of coal rock block, face cleat and butt cleat. Based on the linear elastic theory and displacement equivalent principle and simplifying the face cleat and butt cleat as multi-bank penetrating and intermittent cracks, the model was established to calculate the elastic modulus and Poisson's ratio of coal body combined with cleat. By analyzing the model, it also obtained the influence of the parameter variation of coal rock block, face cleat and butt cleat on the elastic modulus and Poisson's ratio of the coal body. Study results showed that the connectivity rate of butt cleat and the distance between face cleats had a weak influence on elastic modulus of coal body. When the inclination of face cleat was 90°, the elastic modulus of coal body reached the maximal value and it equaled to the elastic modulus of coal rock block. When the inclination of face cleat was 0°, the elastic modulus of coal body was exclusively dependent on the elastic modulus of coal rock block, the normal stiffness of face cleat and the distance between them. When the distance between butt cleats or the connectivity rate of butt cleat was fixed, the Poisson's ratio of the coal body initially increased and then decreased with increasing of the face cleat inclination.

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