The falling weight impact test applied to some glass-fibre reinforced nylons

This paper describes the results of falling weight impact tests (FWITs) on glass-fibre-reinforced (GRP) laminates and E-glass/Dyneema® hybrid laminates. The test programme consisted of (i) falling weight impact tests to determine the penetration energy and (ii) experiments to determine the influence of hybrid construction on damage development and impact fatigue lifetime under repeated impact conditions at sub-penetration energy levels. The objective of this work was to investigate the effect of hybridisation on the impact behaviour of GRP laminates as well as to find optimal conditions for hybridisation. It was shown that in the case of a rigid test set-up - and hence small deflections - the influence of the Dyneema® on the impact behaviour of hybrid laminates is rather small because damage processes are the result of local contact stresses in the vicinity of the impact body, whereas in the case of a compliant test set-up and large deflections the high energy storage capacity of the ductile Dyneema® fibres is used far more effectively for the protection of hybrid composite laminates. Therefore, it was concluded that in order to fully utilise the potential of high-performance polyethylene fibres it is essential that these fibres are located on the (non-impacted) tensile side of an impacted laminate and that the geometrical test conditions are such that large (bending) deformations are allowed.

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Influence of Water Absorption on the Low Velocity Falling Weight Impact Damage Behaviour of Flax/Glass Reinforced Vinyl Ester Hybrid Composites

Molecules ◽

10.3390/molecules25020278 ◽

2020 ◽

Vol 25 (2) ◽

pp. 278 ◽

Cited By ~ 8

Author(s):

Angeline Paturel ◽

Hom Nath Dhakal

Keyword(s):

Glass Fibre ◽

Vinyl Ester ◽

Room Temperature ◽

Moisture Absorption ◽

Impact Damage ◽

Flax Fibre ◽

Low Velocity ◽

Glass Fibre Reinforced ◽

Weight Impact ◽

Falling Weight

Due to rigorous new environmental legislations, automotive, marine, aerospace, and construction sectors have redirected their focus into using more recyclable, sustainable, and environmentally friendly lightweight materials driven by strengthening resource efficiency drive. In this study, the influence of moisture absorption on flax and flax/glass hybrid laminates is presented with the aim to investigating their low velocity impact behaviour. Three different types of composite laminates namely, flax fibre reinforced vinyl ester, flax fibre hybridised glass fibre and glass fibre reinforced vinyl ester composites were fabricated using resin infusion technique. The moisture immersion tests were undertaken by immersing the different specimens in sea water bath at room temperature and 70 °C at different time durations. The low velocity falling weight impact testing was performed at 25 Joules of incident energy level and impact damage behaviour was evaluated at both ageing conditions using scanning electron microscopy (SEM) and X-ray microcomputed tomography (micro CT). The percentage of moisture uptake was decreased for flax vinyl ester specimens with glass fibre hybridisation. The maximum percentage of weight gain for flax fibre, flax/glass hybrid and glass fibre reinforced composites immersed at room temperature for 696 h is recorded at 3.97%, 1.93%, and 0.431%, respectively. The hybrid composite exhibited higher load and energy when compared flax/vinyl ester composite without hybridisation, indicating the hybrid system as a valid strategy towards achieving improved structural performance of natural fibre composites. The moisture absorption behaviour of these composites at room was observed to follow Fickian behaviour.

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Design on Falling Weight Impact Test Rig

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.148-149.388 ◽

2011 ◽

Vol 148-149 ◽

pp. 388-392

Author(s):

Jie Du ◽

Chun Ting Ma

Keyword(s):

Impact Test ◽

Particle Diameter ◽

Test System ◽

Computer Hardware ◽

Sensor Data ◽

Test Rig ◽

High Shock ◽

Data Acquisition Card ◽

Weight Impact ◽

Falling Weight

Based on Interaction energy of solid ball, the new particle damper is designed which can be used in a high temperature and high shock energy. To verify the design of the damper, a falling weight Impact test rig is designed, a sensor, data acquisition card and computer hardware constitutes a signal test system. Experimental results show that the particle diameter is the biggest impact for the role of the particle damper , the characteristics of the displacement curves are increased at first and then decreased, the opposite effect of the time. At the same time filled with particles and the degree of damping rod embedment also have an impact on energy consumption.

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The Effect of Layers and Bullet Type on Impact Properties of Glass Fibre Reinforced Polymer (GFRP) Using a Single Stage Gas Gun (SSGG)

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.564.428 ◽

2014 ◽

Vol 564 ◽

pp. 428-433 ◽

Cited By ~ 3

Author(s):

S.N.A. Safri ◽

Mohamed Thariq Hameed Sultan ◽

N. Razali ◽

Shahnor Basri ◽

Noorfaizal Yidris ◽

...

Keyword(s):

Impact Energy ◽

Glass Fibre ◽

Impact Test ◽

Single Stage ◽

Gas Gun ◽

Reinforced Polymer ◽

Glass Fibre Reinforced Polymer ◽

Fibre Reinforced Polymer ◽

Glass Fibre Reinforced ◽

The Impact

The purpose of this work is to study the best number of layer with the higher impact energy using Glass Fibre Reinforced Polymer (GFRP). The number of layers used in this study was 25, 33, 41, and 49. The impact test was performed using Single Stage Gas Gun (SSGG) for each layers given above with different bullets such as blunt, hemispherical and conical bullets. The gas gun pressure was set to 5, 10, 15 and 20 bar. All of the signals captured from the impact test were recorded using a ballistic data acquisition system. The correlation between the impact energy in terms of number of layer and type of bullet from this test are presented and discussed. It can be summarise that as the number of layer increases, impact energy also increases. In addition, from the results, it was observed that by using different types of bullets (blunt, hemispherical, conical), there is only a slight difference in values of energy absorbed by the specimen.

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The multiaxial behavior of filled polypropylene parts by drop-weight impact test

MATEC Web of Conferences ◽

10.1051/matecconf/201821005013 ◽

2018 ◽

Vol 210 ◽

pp. 05013 ◽

Cited By ~ 1

Author(s):

Ales Mizera ◽

Martin Mizera ◽

Milan Navratil ◽

Stepan Sanda ◽

Michal Opocensky

Keyword(s):

Polymeric Material ◽

Glass Fibre ◽

Impact Loading ◽

Material Properties ◽

Impact Test ◽

Impact Behavior ◽

Suitable Choice ◽

Penetration Test ◽

Weight Impact ◽

The Impact

This study deals with the multiaxial behaviour of reinforced polypropylene with 30 % of glass fibre (PP30GF) and virgin polypropylene (PP). The impact behavior of these two materials is very needed to know for the possible modification of these two materials to obtain the better material properties. The injection moulded PP, and PP30GF samples were subjected to the penetration test at different set potential energies, and the results were subsequently evaluated and discussed. It was found out that PP has better behaviour at the multiaxial stress than PP30GF. It is possible to claim that for the application more demanding to the impact loading, pure PP is more suitable choice of the polymeric material.

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Falling Weight Impact Test for PC/ABS Blend

Proceedings of the 1992 Annual Meeting of JSME/MMD ◽

10.1299/jsmezairiki.2004.0_53 ◽

2004 ◽

Vol 2004 (0) ◽

pp. 53-54

Author(s):

M. Nizar MACHMUD ◽

Masaki OMIYA ◽

Hirotsugu INOUE ◽

Kikuo KISHIMOTO

Keyword(s):

Impact Test ◽

Weight Impact ◽

Falling Weight

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Improved falling weight impact test for poly(vinyl chloride) products

Journal of Vinyl Technology ◽

10.1002/vnl.730030412 ◽

1981 ◽

Vol 3 (4) ◽

pp. 254-257 ◽

Cited By ~ 2

Author(s):

Elvira B. Rabinovitch ◽

James W. Summers

Keyword(s):

Vinyl Chloride ◽

Impact Test ◽

Poly Vinyl Chloride ◽

Weight Impact ◽

Falling Weight

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Numerical study for impact resistant design of full scale arch type reinforced concrete structures under falling weight impact test

Journal of Vibration and Control ◽

10.1177/1077546311419176 ◽

2011 ◽

Vol 18 (9) ◽

pp. 1275-1283 ◽

Cited By ~ 7

Author(s):

Abdul Qadir Bhatti ◽

Shameem Khatoon ◽

Aamir Mehmood ◽

Abid Dastgir ◽

Norimitsu Kishi

Keyword(s):

Reinforced Concrete ◽

Numerical Analysis ◽

Impact Test ◽

Design Procedure ◽

Full Scale ◽

Analysis Method ◽

Rc Structures ◽

Weight Impact ◽

Current Impact ◽

Falling Weight

In this paper, a falling-weight impact test using full scale arch type reinforced concrete (RC) structures was conducted to verify a proposed impact response analysis method. The applicability of the numerical analysis method was confirmed by comparison with the experimental results. The validity of the current impact resistant design procedure to the performance based design procedure was investigated using the proposed numerical analysis method. From this study, it is confirmed that by applying the current impact resistant design procedure, a performance based impact resistant design with a sufficient safety margin may be obtained for the full scale arch type RC structures.

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