Studies on Dynamic Mechanical Properties of Glass Fiber Reinforced Silica Aerogel

2011 ◽  
Vol 138-139 ◽  
pp. 709-717
Author(s):  
Hai Jun Wu ◽  
Da Long Li ◽  
Shu Ren Zhu ◽  
Feng Lei Huang
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Constitutive Relation ◽  
Split Hopkinson Pressure Bar ◽  
Dynamic Compression ◽  
Dynamic Mechanical Properties ◽  
Fiber Reinforced ◽  
Hopkinson Pressure Bar ◽  
Compression Process ◽  
Glass Fiber Reinforced

The stress-strain curves of glass-fiber reinforced silica aerogels (GRSA) are obtained by carrying out the quasi-static and split Hopkinson pressure bar (SHPB) experiments. The dynamic compression process of experimental materials are precisely controlled with the “frozen strain” method, and the effects of relative density, diameter and strain rate on dynamic compressive mechanical properties are discussed. Then the compressed samples are observed with scanning electron microcopy (SEM). Considering the Sherwood-Frost constitutive relation and contribution of gas to the strength of the material, the macroscopic phenomenological constitutive relation of this material is developed.

scholarly journals Influence of Stacking Sequence on the Mechanical and Dynamic Mechanical Properties of Cotton/Glass Fiber Reinforced Polyester Composites

2016 ◽  
Vol 19 (3) ◽  
pp. 542-547 ◽  
Author(s):  
Emanoel Henrique Portella ◽  
Daiane Romanzini ◽  
Clarissa Coussirat Angrizani ◽  
Sandro Campos Amico ◽  
Ademir José Zattera
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Dynamic Mechanical Properties ◽  
Stacking Sequence ◽  
Fiber Reinforced ◽  
Dynamic Mechanical ◽  
Glass Fiber Reinforced ◽  
Polyester Composites

Degradation of dynamic mechanical properties of glass fiber reinforced polyester composite pipes after immersion in various temperatures

2013 ◽  
Vol 48 (24) ◽  
pp. 3025-3034 ◽  
Author(s):  
Ilias Mouallif ◽  
Abdelkhalek Latrach ◽  
M’hamed Chergui ◽  
Abdelkader Benali ◽  
Mohammed Elghorba ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Dynamic Mechanical Properties ◽  
Fiber Reinforced ◽  
Dynamic Mechanical ◽  
Glass Fiber Reinforced ◽  
Polyester Composite ◽  
Composite Pipes

Dynamic Behavior of Monolithic and Composite Materials by Split Hopkinson Pressure Bar Testing

2002 ◽  
Author(s):  
Marco Costanzi ◽  
Gautam Sayal ◽  
Golam Newaz
Keyword(s):  
Mechanical Properties ◽  
Split Hopkinson Pressure Bar ◽  
Dynamic Mechanical Properties ◽  
Hopkinson Pressure Bar ◽  
Glass Fiber Reinforced ◽  
Experimental Apparatus ◽  
Different Types ◽  
Split Hopkinson ◽  
Pressure Bar ◽  
Long Cylinder

A Split Hopkinson Pressure Bar (SHPB), an experimental apparatus for testing of solid materials at high strain rates, was in-house designed and realized by the Mechanical Engineering Dept. of WSU: it can test different types of materials and provide their dynamic mechanical properties (e.g. Young’s modulus, hardening or plasticization coefficients, yield strength). This SHPB works at strain rate levels between 1000 and 3000 s-1 and impact speeds between 6 and 9 m/s. The specimen is simply a 6 mm dia. 3 mm long cylinder. The apparatus and its software were benchmarked by means of tests on Aluminum and Titanium, whose mechanical properties are well known, and later successfully applied to non-metallic materials like Nylon, Epoxy, Carbon fiber and glass fiber reinforced composites.

Strain rates effect of dynamic compression properties of E-glass / jute composite

2020 ◽  
Vol 14 (3) ◽  
pp. 7162-7169
Author(s):  
Muhamad Shahirul Mat Jusoh ◽  
Mohd Yazid Yahya ◽  
Haris Ahmad Israr Ahmad
Keyword(s):  
Mechanical Properties ◽  
Hybrid Composite ◽  
Split Hopkinson Pressure Bar ◽  
Dynamic Testing ◽  
Dynamic Compression ◽  
Compressive Strain ◽  
Dynamic Mechanical Properties ◽  
Strain Rates ◽  
Hopkinson Pressure Bar ◽  
Dynamic Mechanical

Presently, the application of natural fibres widely gains attention from academia and industries as an alternative material in the composite system. The introduction of the hybrid composite using natural and synthetic fibres is extensively investigated on the static mechanical properties. However, the investigation on the high strain-rates effect is less reported due to the difficulty of the experimental set-up as well as the limitation of dynamic testing apparatus. The split Hopkinson pressure bar (SHPB) was utilised in this present study to characterise the dynamic mechanical properties of the hybrid composite between E-glass with jute fibres at three different strain rates of 755, 1363, and 2214 s−1. Results showed that the dynamic compression stress and strain of the tested samples significantly influenced by the value of strain rates applied. The E-glass/jute sample exhibited the strain-rate dependent behaviour, whereby the higher dynamic mechanical properties were recorded when the higher strain rates were imposed. The difference between maximum dynamic stress was 12.1 and 23.9% when the strain rates were increased from 755 to 1363 s−1 and 1363 to 2214 s−1, respectively. In terms of compressive strain, the maximum compressive strain was recorded when the lower strain rates were imposed during testing.

scholarly journals Dynamic Compressive and Tensile Characteristics of a New Type of Ultra-High-Molecular Weight Polyethylene (UHMWPE) and Polyvinyl Alcohol (PVA) Fibers Reinforced Concrete

2019 ◽  
Vol 2019 ◽  
pp. 1-19 ◽  
Author(s):  
Bashir H. Osman ◽  
Xiao Sun ◽  
Zhenghong Tian ◽  
Hao Lu ◽  
Guilin Jiang
Keyword(s):  
Mechanical Properties ◽  
Constitutive Model ◽  
Construction Projects ◽  
Split Hopkinson Pressure Bar ◽  
Dynamic Compression ◽  
Dynamic Mechanical Properties ◽  
Hopkinson Pressure Bar ◽  
Dynamic Increase Factor ◽  
Fiber Concrete ◽  
New Type

The dynamic mechanical properties of concrete materials are important parameters for evaluating the safety performance of concrete structures under dynamic loads. Fiber cement-based materials have been widely used in the construction projects due to their strength, toughening, and cracking resistance. In this study, we conducted experimental and theoretical studies on dynamic compression and tensile mechanical properties of different proportions of new-type fiber concrete. A Split-Hopkinson pressure bar equipment was used to determine the concrete behavior at different strain rates. The effects of strain rate and fiber content on the strength of the specimen, dynamic increase factor, and ultimate strain were analyzed. Based on the macrodamage factor, the traditional nonlinear viscoelastic constitutive model was simplified and improved. The four-parameter constitutive model was obtained, and the influence of these parameters on the performance of fiber concrete was analyzed. The experimental results were compared with those predicted from the available equations, and results were in accordance. Finally, an analytical equation for predicting the dynamic compression and tensile properties of these new-type fibers was proposed.

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