Charpy impact tests on composite structures – An experimental and numerical investigation

Hufenbach, W.; Ibraim, F. Marques; Langkamp, Αlbert; Böhm, Robert; Hornig, Andreas

doi:10.1016/j.compscitech.2007.10.008

Cited by 81 publications

(34 citation statements)

References 5 publications

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“…Similar results for carbon textile reinforcements bonded to an epoxy resin were reported in [4] showing an increasing trend in impact resistance with increasing specimen thickness. Note that for short and long basalt fiber reinforced thermoplastic matrix laminates the Charpy impact strength was found in the range of 48-75 kJ/m 2 [3] comparable to the values obtained for glass fabric based systems.…”

Section: Charpy Testsupporting

confidence: 74%

“…Numerical simulation of these tests is still at its infancy and is typically reduced to the analysis of macroscopically homogeneous orthotropic systems [4] irrespective of the actual microstructure. This is partly attributed to the geometrical complexity of the reinforcements, which is often of random nature and its proper introduction into advanced computations calls for the definition of a certain statistically equivalent periodic unit cell (SEPUC) [5].…”

Section: Faculty Of Textile Materials Technical University In Liberecmentioning

confidence: 99%

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Effective mechanical and transport properties of polysiloxane matrix based composites

Mar

Sala

́a

et al. 2012

WIT Transactions on the Built Environment

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The present paper describes experimental and numerical work for the evaluation of the selected effective mechanical and transport material properties of polysiloxane matrix based composites. Three different material systems including carbon, basalt and glass plain weave textile reinforcements are first studied experimentally with emphasis on the influence of processing temperature, number of reinforcement layers and the resulting porosity. The Mori-Tanaka averaging scheme is then selected for the numerical evaluation of effective electric conductivities adopting the standard bottom-up hierarchical homogenization.

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Section: Charpy Testsupporting

confidence: 74%

Section: Faculty Of Textile Materials Technical University In Liberecmentioning

confidence: 99%

Effective mechanical and transport properties of polysiloxane matrix based composites

Mar

Sala

́a

et al. 2012

WIT Transactions on the Built Environment

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show abstract

“…A further hypothesis is that specimens with higher V f values will increase opportunities for energy absorption through prestress-enhanced fibre debonding. It should be noted that studies on unidirectional fibre PMCs commonly refer to failure by delamination rather than (generic) fibre debonding, reflecting the use of prepregs [14,15,17,20] as opposed to separate fibres in unidirectional EPPMCs [2] and VPPMCs [12]. For the current study, we suggest that sample (flatwise) testing geometry and resulting (shear-induced) failure effectively render both terms interchangeable for macroscopic observations.…”

Section: Published Charpy Impact Test Work On Prestressed Compositesmentioning

confidence: 99%

Viscoelastically prestressed polymeric matrix composites – Effects of test span and fibre volume fraction on Charpy impact characteristics

Fazal

Fancey

2013

Composites Part B: Engineering

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a b s t r a c tA viscoelastically prestressed polymeric matrix composite (VPPMC) is produced by subjecting polymeric fibres to tensile creep, the applied load being removed before moulding the fibres into a resin matrix. After matrix curing, the viscoelastically strained fibres impart compressive stresses to the surrounding matrix, thereby improving mechanical properties. This study investigated the mechanisms considered responsible for VPPMCs improving impact toughness by performing Charpy impact tests on unidirectional nylon 6,6 fibre-polyester resin samples over a range of span settings (24-60 mm) and fibre volume fractions (3.3-16.6%). Comparing VPPMC samples with control (unstressed) counterparts, the main findings were: (i) improved impact energy absorption (up to 40%) depends principally on shear stressinduced fibre-matrix debonding (delamination) and (ii) energy absorption improves slightly with increasing fibre volume fraction, but the relationship is statistically weak. The findings are discussed in relation to improving the impact performance of practical structures.

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“…Metals are isotropic materials that are different from NFCs in composition, microstructure and manufacturing condition [33]. These method can miss important information of test specimen behaviour and characteristic of the material during the impact event and can provide misleading information of impact strength.…”

Section: Comparison Of Different Impact Test Methodsmentioning

confidence: 99%

Impact Strength of Natural Fibre Composites Measured by Different Test Methods: A Review

Navaranjan

Neitzert

2017

MATEC Web Conf.

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Abstract. Different types of impact test methods have been used in recent years to measure the impact resistance of natural fibre composites (NFCs). After reviewing the literature, the impact resistance of flax, hemp, sisal, wood and jute fibre composites that were measured using different test methods have been compared and discussed. It has been learned that the test methods were selected for research interest, industry requirement or availability of test equipment. Each method had its own advantages and limitations. The result from a particular test could be compared but not with the result from other test methods. Most impact test methods were developed for testing ductile-brittle transition of metals. However, each NFC has a different morphology and cannot be comparable to metals in failure mode and energy absorption characteristic during an impact test. A post evaluation of morphology of an NFC sample after an impact test is important to characterise the material.

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Charpy impact tests on composite structures – An experimental and numerical investigation

Cited by 81 publications

References 5 publications

Effective mechanical and transport properties of polysiloxane matrix based composites

Effective mechanical and transport properties of polysiloxane matrix based composites

Viscoelastically prestressed polymeric matrix composites – Effects of test span and fibre volume fraction on Charpy impact characteristics

Impact Strength of Natural Fibre Composites Measured by Different Test Methods: A Review

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