scholarly journals Numerical Experiment Research on Failure Characteristics of Anchored Rock With Negative Poisson’s Ratio Bolt

2021 ◽  
Author(s):  
Feng Chen ◽  
Man-chao HE ◽  
DU Yan-hong ◽  
SUN Xiao-ming ◽  
MA Tian-hui
Keyword(s):  
Numerical Experiment ◽  
Poisson’S Ratio ◽  
Poisson's Ratio ◽  
Negative Poisson’S Ratio ◽  
Continuous Increase ◽  
Mining Depth ◽  
Rock Movement ◽  
Negative Poisson's Ratio ◽  
Working Principle ◽  
Rock Model

Abstract With the continuous increase of mining depth and engineering burying depth, the nonlinear physical and mechanical phenomena exhibited by rock are also more complicated. The load value often exceeds the yield strength of the traditional Poisson's ratio supporting materials, causing the supporting body to fail. Therefore, the bolt still needs to further in-depth research on new materials. In this paper, the rock model with a negative Poisson’s ratio bolt had been established, the material properties of negative Poisson’s ratio and the working principle of RFPA software were introduced, and RFPA software was used to study the reinforcement effect of negative Poisson's ratio bolt on the rock. The numerical experiment results show that, compared with the positive Poisson's ratio bolt, the negative Poisson's ratio bolt can significantly increase the bearing capacity of anchored rock, enhance the friction between the bolt body and the surrounding rock, and limit the rock movement. The anchored rock with negative Poisson’s ratio bolt can absorb more energy. Negative Poisson's ratio material is one of the future development directions of bolt material.

scholarly journals Numerical experiment research on failure characteristics of anchored rock with negative Poisson’s ratio bolt

2021 ◽  
Author(s):  
feng chen ◽  
Yanhong Du ◽  
manchao he ◽  
xiaoming sun ◽  
tianhui ma
Keyword(s):  
Numerical Experiment ◽  
Poisson’S Ratio ◽  
Poisson's Ratio ◽  
Negative Poisson’S Ratio ◽  
Continuous Increase ◽  
Mining Depth ◽  
Rock Movement ◽  
Negative Poisson's Ratio ◽  
Working Principle ◽  
Rock Model

Abstract With the continuous increase of mining depth and engineering burying depth, the nonlinear physical and mechanical phenomena exhibited by rock are also more complicated. The load value often exceeds the yield strength of the traditional Poisson's ratio supporting materials, causing the supporting body to fail. Therefore, the bolt still needs to further in-depth research on new materials. In this paper, the rock model with a negative Poisson’s ratio bolt had been established, the material properties of negative Poisson’s ratio and the working principle of RFPA software were introduced, and RFPA software was used to study the reinforcement effect of negative Poisson's ratio bolt on the rock. The numerical experiment results show that, compared with the positive Poisson's ratio bolt, the negative Poisson's ratio bolt can significantly increase the bearing capacity of anchored rock, enhance the friction between the bolt body and the surrounding rock, and limit the rock movement. The anchored rock with negative Poisson’s ratio bolt can absorb more energy. Negative Poisson's ratio material is one of the future development directions of bolt material.

Free vibration and sound insulation of functionally graded honeycomb sandwich plates

2021 ◽  
pp. 109963622110204
Author(s):  
Fenglian Li ◽  
Wenhao Yuan ◽  
Chuanzeng Zhang
Keyword(s):  
Free Vibration ◽  
Poisson’S Ratio ◽  
Functionally Graded ◽  
Poisson's Ratio ◽  
Dynamic Equations ◽  
Sound Insulation ◽  
Sandwich Plates ◽  
Negative Poisson’S Ratio ◽  
Honeycomb Sandwich ◽  
Negative Poisson's Ratio

Based on the hyperbolic tangent shear deformation theory, free vibration and sound insulation of two different types of functionally graded (FG) honeycomb sandwich plates with negative Poisson’s ratio are studied in this paper. Using Hamilton’s principle, the vibration and vibro-acoustic coupling dynamic equations for FG honeycomb sandwich plates with simply supported edges are established. By applying the Navier’s method and fluid–solid interface conditions, the derived governing dynamic equations are solved. The natural frequencies and the sound insulation of FG honeycomb sandwich plates obtained in this work are compared with the numerical results by the finite element simulation. It is proven that the theoretical models for the free vibration and the sound insulation are accurate and efficient. Moreover, FG sandwich plates with different honeycomb cores are investigated and compared. The corresponding results show that the FG honeycomb core with negative Poisson’s ratio can yield much lower frequencies. Then, the influences of various geometrical and material parameters on the vibration and sound insulation performance are systematically analyzed.

scholarly journals Giant negative Poisson’s ratio in two-dimensional V-shaped materials

2021 ◽  
Author(s):  
Xikui Ma ◽  
Jian Liu ◽  
Yingcai Fan ◽  
Weifeng Li ◽  
Jifan Hu ◽  
...  
Keyword(s):  
Poisson’S Ratio ◽  
Poisson's Ratio ◽  
Negative Poisson’S Ratio ◽  
Two Dimensional ◽  
Auxetic Materials ◽  
Negative Poisson's Ratio ◽  
Poisson's Ratios ◽  
Poisson’S Ratios

Two-dimensional (2D) auxetic materials with exceptional negative Poisson’s ratios (NPR) are drawing increasing interest due to the potentials in medicine, fasteners, tougher composites and many other applications. Improving the auxetic...

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