High‐strain‐rate mechanical performance of particle‐ and fiber‐reinforced polymer composites measured with split Hopkinson bar: A review

2021 ◽  
Author(s):  
Antimo Graziano ◽  
Otavio Augusto Titton Dias ◽  
Oren Petel
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Polymer Composites ◽  
Mechanical Performance ◽  
High Strain ◽  
Hopkinson Bar ◽  
Fiber Reinforced Polymer ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites ◽  
Split Hopkinson

scholarly journals Study of the tensile and impact energy absorption properties of hybrid bast and basalt fiber composites and the effect of basalt fibers size at the mechanical properties

2021 ◽  
Author(s):  
YOUSUF PASHA SHAIK ◽  
Vijay Bhaskar Narlakanti ◽  
Jens Schuster
Keyword(s):  
Mechanical Properties ◽  
Polymer Composites ◽  
Mechanical Performance ◽  
Natural Fiber ◽  
Basalt Fiber ◽  
Fiber Reinforced Polymer ◽  
Basalt Fibers ◽  
Fiber Mats ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites

Abstract Natural Bast fiber reinforced polymer composites are attractive because of their renewability and environment friendliness. Therefore, in this work, the mechanical properties of these composites have been tried to improve by adding basalt fibers. The fiber mats were prepared by carding. After press molding, the tensile and Charpy mechanical properties of compression molded samples were studied. Moreover, the influence of basalt fibers with two different sizes was studied at the mechanical performance of the composites. Improvement of mechanical property profile of natural fiber (bast) reinforced polymer composites is carried out by hybridization with basalt fibers.

scholarly journals Combined shear/tension testing of fibre composites at high strain rates using an image-based inertial impact test

2018 ◽  
Vol 183 ◽  
pp. 02041 ◽  
Author(s):  
Lloyd Fletcher ◽  
Jared Van-Blitterswyk ◽  
Fabrice Pierron
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Stress Wave ◽  
Impact Test ◽  
High Strain ◽  
Hopkinson Bar ◽  
Test Method ◽  
Strain Rates ◽  
Fibre Composites ◽  
Split Hopkinson

Testing fibre composites off-axis has been used extensively to explore shear/tension coupling effects. However, off-axis testing at strain rates above 500 s-1 is challenging with a split Hopkinson bar apparatus. This is primarily due to the effects of inertia, which violate the assumption of stress equilibrium necessary to infer stress and strain from point measurements taken on the bars. Therefore, there is a need to develop new high strain rate test methods that do not rely on the assumptions of split Hopkinson bar analysis. Recently, a new image-based inertial impact test has been used to successfully identify the transverse modulus and tensile strength of a unidirectional composite at strain rates on the order of 2000 -1. The image-based inertial impact test method uses a reflected compressive stress wave to generate tensile stress and failure in an impacted specimen. Thus, the purpose of this study is to modify the image-based inertial impact test method to investigate the high strain rate properties of fibre composites using an off-axis configuration. For an off-axis specimen, a combined shear/tension or shear/compression stress state will be obtained. Throughout the propagation of the stress wave, full-field displacement measurements are taken. Strain and acceleration fields are then derived from the displacement fields. The kinematic fields are then processed with the virtual fields method (VFM) to reconstruct stress averages and identify the in-plane stiffness components G12 and E22.

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