Characterization of unidirectional carbon fiber reinforced polyamide-6 thermoplastic composite under longitudinal compression loading at high strain rate
In the presented work, an experimental investigation has been performed to characterize the strain rate dependency of unidirectional carbon fiber reinforced polyamide-6 composite for longitudinal compression loading. An end-loaded compression specimen geometry, suitable for contactless optical strain measurement via digital image correlation and dynamic loading in a split-Hopkinson pressure bar, was developed. For the dynamic experiments at a constant strain rate of 100 s −1 a modified version of the Dynamic Compression Fixture, developed by Koerber and Camanho [Koerber and Camanho, Composites Part A, 42, 462–470, 2011] was used. The results were compared with quasi-static test results at a strain rate of 3 · 10 −4 s −1 using the same specimen geometry. It was found that the longitudinal compressive strength increased by 61% compared to the strength value obtained from the quasi-static tests.
#2Saeid Arabnejad(NUS: National University of Singapore)H-Index: 7
Last. V.P.W. Shim(NUS: National University of Singapore)H-Index: 36
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Abstract A constitutive model is proposed to describe the quasi-static and high rate large deformation response of semi-crystalline polymers. This model is developed based on an elastic–viscoelastic–viscoplastic framework, to predict the temperature and rate-dependent response of an incompressible semi-crystalline polymer, Nylon 6. Material samples are subjected to high rate compressive and tensile loading using Split Hopkinson Bar devices, and they exhibit a temperature increase, which induces ...
Abstract This paper presents an experimental investigation of the strain rate effect on unidirectional carbon–epoxy IM7-8552 loaded in longitudinal compression. A dynamic compression fixture was developed for a split-Hopkinson pressure bar to test flat rectangular specimens. The dynamic experiment was designed by finite element analysis, using an axis-symmetric elastic model of the test setup. Due to the linear specimen stress–strain behaviour, ramp-shaped incident pulses were used, to ensure a ...
Abstract The effects of the draw temperature and the strain rate on the tensile deformation of polyamide 6 (PA6) were investigated using three PA6 samples with different initial shapes and physical dimensions. It is observed that the special double yielding phenomenon is indeed present in PA6, provided that certain temperature and strain rate are given, as well as the appropriate initial structure. The results also show that the dependence of the first yield stress on temperature is nearly linea...
Publisher Summary The consumption of thermoplastics and thermoplastic composites is controlled by user market demand and the capacity for innovation in terms of materials and processes. The purpose of this exploratory study is to provide some background information on these points. The use of thermoplastics and thermoplastic composites makes it possible to satisfy some of the requirements. To achieve greater market penetration, thermoplastics and thermoplastic composites must enhance prices, per...
#1Bouchaib Mouhmid(Lille University of Science and Technology)H-Index: 2
#2Abdellatif Imad(Lille University of Science and Technology)H-Index: 28
Last. Abderrahim Maazouz(INSA Lyon: Institut national des sciences Appliquées de Lyon)H-Index: 28
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In this experimental work, we studied the mechanical behaviour of a short glass fibre reinforced polyamide frequently used in the automobile industry. In order to investigate the influence of glass fibre content, temperature and strain rate, we carried out a series of uniaxial tensile loadings on an unfilled polyamide and glass fibre reinforced polyamide with different weight fractions: 15, 30 and 50 wt%. Experimental results showed that the studied composite is a strain rate, temperature and fi...
#2Yuanxin Zhou(UM: University of Michigan)H-Index: 3
Last. P. K. Mallick(UM: University of Michigan)H-Index: 7
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Tensile behavior of extruded short E-glass fiber reinforced polyamide-6 composite sheet has been determined at different temperatures (21.5°C, 50°C, 75°C, 100°C) and different strain rates (0.05/min, 0.5/min, 5/min). Experimental results show that this composite is a strain rate and temperature dependent material. Both elastic modulus and tensile strength of the composite increased with strain rate and decreased with temperature. Experimental results also show that strain rate sensitivity and te...
Last. H. H. Kausch(EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 16
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Abstract Tensile testing of plain-weave-cloth-reinforced polyamide composites has been carried out at various strain rates ranging from 1×10−2 to 4×101 s−1 in a servohydraulic testing apparatus. Four different polyamide composites studied were composed of two kinds of reinforcements, carbon fibre (CF) and glass fibre (GF), and two kinds of matrices, polyamide-6 (PA6) and modified polyamide-6 (mPA6). The experimental results showed that the tensile strength and failure strain of the composites te...
Abstract This work presents an experimental study on the mechanical behaviour of thermoplastic polyarlyetherketone (PAEK) based composite laminates reinforced with woven carbon fibres, subjected to high strain rates under compression loading. The specimens were tested using a Split Hopkinson Pressure Bar (SHPB). The tests covered the working temperatures and stress envelopes of −54 °C, RT (25 °C), and 80 °C, each tested at six different off-axis angles. The high-speed imaging system was used to ...
#1Abdellah Massaq(ENSA: Entertainments National Service Association)H-Index: 4
#1Abdellah Massaq(ENSA: Entertainments National Service Association)H-Index: 4
Last. Angel Arias(ISCIII: Carlos III Health Institute)H-Index: 22
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Abstract This paper presents an experimental study on the effect of strain rate on the compressive behavior of polyamide composites. Contrary to thermoset woven reinforced composites, thermoplastic woven reinforced composites have always received less interest despite its excellent damage and impact resistances. In this context, this work aims to study the behavior of fiber reinforced thermoplastic composites submitted to high strain rate in compression. The tested material is a thermoplastic co...
#1Marina Ploeckl(TUM: Technische Universität München)H-Index: 5
#2Peter Kuhn(TUM: Technische Universität München)H-Index: 72
Last. H. Koerber(TUM: Technische Universität München)H-Index: 7
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Abstract This paper presents an experimental study of the strain-rate effect on the longitudinal compressive strength of UD carbon-epoxy IM7/8552 and UD carbon-fiber-reinforced polyamide-6. A test setup for dynamic measurements using a split-Hopkinson pressure bar was developed to achieve valid compressive failure in the specimen’s free gauge section. The setup presented improves on the dynamic compression fixture developed in an earlier study [Koerber and Camanho, Composites Part A 2011;42]. Gr...