A modified triaxial split Hopkinson pressure bar (SHPB) system for quantifying the dynamic compressive response of porous rocks subjected to coupled hydraulic-mechanical loading

2022 ◽  
Vol 8 (1) ◽  
Author(s):  
Geli Zhao ◽  
Xing Li ◽  
Ying Xu ◽  
Kaiwen Xia
Keyword(s):  
Mechanical Loading ◽  
Split Hopkinson Pressure Bar ◽  
Porous Rocks ◽  
Hopkinson Pressure Bar ◽  
Compressive Response ◽  
Split Hopkinson ◽  
Pressure Bar

Quasi-Static and High Strain Rate Uniaxial Compressive Response of Recycled Polycarbonate from Industrial Waste

2020 ◽  
Vol 1012 ◽  
pp. 89-93
Author(s):  
Anderson Oliveira da Silva ◽  
Ricardo Pondé Weber ◽  
Sergio Neves Monteiro
Keyword(s):  
Industrial Waste ◽  
Split Hopkinson Pressure Bar ◽  
Dynamic Properties ◽  
Hopkinson Pressure Bar ◽  
Mechanical Recycling ◽  
Static Compression ◽  
Compressive Response ◽  
Split Hopkinson ◽  
Pressure Bar ◽  
Quasi Static Compression

This work evaluates the mechanical and dynamic behavior of recycled polycarbonate (rPC) from industrial waste. This study aims to verify whether the recycled process adopted for polycarbonate promotes both mechanical and dynamic properties values under compressive stress, similar to those found for virgin polycarbonate. The mechanical recycling of the rPC was carried out using the thermoforming technique in a thermal press. Two tests were carried out to evaluate the dynamic response of rPC. The quasi-static compression test was performed on a universal machine. The dynamic in a split Hopkinson pressure bar was performed with three different strain rates. The results showed that the mechanical and primary recycling adopted in this work promoted values of yield stress in compression (77 MPa) and dynamic (up to 118 MPa), close to or superior to those reported so far in the literature.

scholarly journals Testing of Weakly Weathered Granites of Different Porosities Using a Split Hopkinson Pressure Bar Technique

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Lei Yan ◽  
Liansheng Liu ◽  
Shenghui Zhang ◽  
Depei Lan ◽  
Jiangchao Liu
Keyword(s):  
Split Hopkinson Pressure Bar ◽  
Peak Stress ◽  
Stress Waves ◽  
Porous Rocks ◽  
Average Strain ◽  
Hopkinson Pressure Bar ◽  
Average Strain Rate ◽  
Split Hopkinson ◽  
Pressure Bar ◽  
Damage Impact

Nuclear magnetic resonance (NMR) and damage impact testing, using a split Hopkinson pressure bar (SHPB) technique, were conducted on weakly weathered granites of different porosities. Based on this, this study determined and analysed the pore structure and distribution, propagation characteristics of stress waves, changes in initial tangent modulus, and energy dissipation in weakly weathered granites of different porosities. The research demonstrated that the nature of the internal porosity of weakly weathered granites changed with total porosity. Pore structure significantly influenced the amplitude of reflected waves and distortion of transmitted waves. Under constant-damage impact loads, the initial tangent modulus decreased with increasing porosity, whereas the stress-strain curves, after reaching the peak stress, had similar shapes. Peak stress and average strain rate showed a strong power-law correlation with porosity, and peak stress decreased in a power-law correlation with the increase of average strain rate. In other words, the difference in average strain resulted from different porosities when the incident energy was same, and the average strain was negatively correlated with porosity. Under damaging impact, the energy absorbed per unit volume decreased with increasing porosity. The research results reveal dynamic characteristics of natural porous rocks under damage impacts, which provide a reference for studying damage effects of porous rocks under the effects of stress waves.

Analysis of the Impact of the Frequency Range of the Tensometer Bridge and Projectile Geometry on the Results of Measurements by the Split Hopkinson Pressure Bar Method

2013 ◽  
Vol 20 (4) ◽  
pp. 555-564 ◽  
Author(s):  
Wojciech Moćko
Keyword(s):  
Test Bench ◽  
Split Hopkinson Pressure Bar ◽  
Dynamic Deformation ◽  
Spectral Width ◽  
Hopkinson Pressure Bar ◽  
Computing Environment ◽  
Split Hopkinson ◽  
Pressure Bar ◽  
The Impact ◽  
Bench Model

Abstract The paper presents the results of the analysis of the striker shape impact on the shape of the mechanical elastic wave generated in the Hopkinson bar. The influence of the tensometer amplifier bandwidth on the stress-strain characteristics obtained in this method was analyzed too. For the purposes of analyzing under the computing environment ABAQUS / Explicit the test bench model was created, and then the analysis of the process of dynamic deformation of the specimen with specific mechanical parameters was carried out. Based on those tests, it was found that the geometry of the end of the striker has an effect on the form of the loading wave and the spectral width of the signal of that wave. Reduction of the striker end diameter reduces unwanted oscillations, however, adversely affects the time of strain rate stabilization. It was determined for the assumed test bench configuration that a tensometric measurement system with a bandwidth equal to 50 kHz is sufficient

Dispersion Correction for Split-Hopkinson Pressure Bar Data

1988 ◽  
Author(s):  
L. E. Malvern ◽  
D. A. Jenkins ◽  
E. Jerome ◽  
J. C. Gong
Keyword(s):  
Split Hopkinson Pressure Bar ◽  
Dispersion Correction ◽  
Hopkinson Pressure Bar ◽  
Split Hopkinson ◽  
Pressure Bar

scholarly journals Dynamic compressive and splitting tensile tests on mortar using split Hopkinson pressure bar technique

2015 ◽  
Vol 12 (4) ◽  
pp. 730-746 ◽  
Author(s):  
Fei Yang ◽  
Hongwei Ma ◽  
Lin Jing ◽  
Longmao Zhao ◽  
Zhihua Wang
Keyword(s):  
Split Hopkinson Pressure Bar ◽  
Tensile Tests ◽  
Hopkinson Pressure Bar ◽  
Split Hopkinson ◽  
Pressure Bar
Sign in / Sign up

Export Citation Format

Share Document