CompositesPub Date : 1995-07-01DOI: 10.1016/0010-4361(95)96804-F
J.L. Thomason
{"title":"The interface region in glass fibre-reinforced epoxy resin composites: 1. Sample preparation, void content and interfacial strength","authors":"J.L. Thomason","doi":"10.1016/0010-4361(95)96804-F","DOIUrl":"10.1016/0010-4361(95)96804-F","url":null,"abstract":"<div><p>This paper deals with the influence of the fibre-matrix interface on the properties of glass fibre-reinforced epoxy matrix composites. Interfacial strength, as measured by the interlaminar shear strength, in E-glass fibre-reinforced<span>Epikote</span></p></div>","PeriodicalId":100296,"journal":{"name":"Composites","volume":"26 7","pages":"Pages 467-475"},"PeriodicalIF":0.0,"publicationDate":"1995-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0010-4361(95)96804-F","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88708750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CompositesPub Date : 1995-07-01DOI: 10.1016/0010-4361(95)96806-H
J.L. Thomason
{"title":"The interface region in glass fibre-reinforced epoxy resin composites: 3. Characterization of fibre surface coatings and the interphase","authors":"J.L. Thomason","doi":"10.1016/0010-4361(95)96806-H","DOIUrl":"10.1016/0010-4361(95)96806-H","url":null,"abstract":"<div><p>It is well known that application of a coupling agent to a glass fibre surface will improve fibre-matrix adhesion in composites. However, on a commercial glass fibre the coupling agent forms only a small fraction of the coating, the larger part being a mixture of processing aids whose contribution to composite properties is not well defined. The interfacial region of the composite will therefore be affected not only by the composition of the coating, but also by its distribution on the glass fibre surface and in the composite matrix. We have used a wide range of analytical methods to investigate these coatings, both on the glass fibre surface and in the composite. These techniques included Fourier transform infra-red spectroscopy (<em>FT</em>i.r.), nuclear magnetic resonance spectroscopy (n.m.r.), X-ray photoelectron spectroscopy (XPS), secondary ion mass spectrometry (s.i.m.s.), differential scanning calorimetry (d.s.c.), dynamic mechanical analysis (d.m.a.) and contact angle measurements. Information was obtained on the composition of the coatings, their transition temperature and their distribution on the glass fibre surface. Results indicate that the coupling agent on these commercial glass fibres may have already reacted with another component of the fibre coating. The effect of an interphase around the fibre, caused by incomplete dissolution of the coating in the matrix, was determined by d.m.a, and the chemical nature of the interphase was investigated using scanning s.i.m.s.</p></div>","PeriodicalId":100296,"journal":{"name":"Composites","volume":"26 7","pages":"Pages 487-498"},"PeriodicalIF":0.0,"publicationDate":"1995-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0010-4361(95)96806-H","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79074639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CompositesPub Date : 1995-07-01DOI: 10.1016/0010-4361(95)96813-L
{"title":"Stampable reinforced thermoplastic sheet and articles obtained from said sheet","authors":"","doi":"10.1016/0010-4361(95)96813-L","DOIUrl":"https://doi.org/10.1016/0010-4361(95)96813-L","url":null,"abstract":"","PeriodicalId":100296,"journal":{"name":"Composites","volume":"26 7","pages":"Page 525"},"PeriodicalIF":0.0,"publicationDate":"1995-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0010-4361(95)96813-L","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91738922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CompositesPub Date : 1995-07-01DOI: 10.1016/0010-4361(95)96807-I
Michael R. Wisnom , David Green
{"title":"Tensile failure due to interaction between fibre breaks","authors":"Michael R. Wisnom , David Green","doi":"10.1016/0010-4361(95)96807-I","DOIUrl":"10.1016/0010-4361(95)96807-I","url":null,"abstract":"<div><p>A new explanation for tensile strength of unidirectional composites is proposed based on the linking of fibre breaks in adjacent fibres if they are within a critical axial distance. No stress concentrations are included in the model. The probability of obtaining a given number of fibre breaks sufficiently close to interact is estimated by scanning an array of fibres for clusters of broken fibres. Using a simple energy balance approach it is shown that a bundle of failed fibres of a certain critical size can pull out from the rest of the composite by shear failure around the edge of the bundle, and this can be expected to lead to catastrophic fracture. Tensile strengths are obtained which are comparable with experimental data for unidirectional carbon fibre/epoxy, suggesting that it may be the interaction of fibre breaks rather than the stress concentrations associated with the breaks which is critical in determining composite tensile strength.</p></div>","PeriodicalId":100296,"journal":{"name":"Composites","volume":"26 7","pages":"Pages 499-508"},"PeriodicalIF":0.0,"publicationDate":"1995-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0010-4361(95)96807-I","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73403463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}