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Titolo:
Strain field inhomogeneities and stiffness changes in GMT containing voids
Autore:
Nilsson, G; Fernberg, SP; Berglund, LA;
Indirizzi:
SICOMP AB, SE-94126 Pitea, Sweden SICOMP AB Pitea Sweden SE-94126SICOMP AB, SE-94126 Pitea, Sweden Lulea Univ Technol, Div Polymer Engn, SE-97187 Lulea, Sweden Lulea Univ Technol Lulea Sweden SE-97187 er Engn, SE-97187 Lulea, Sweden
Titolo Testata:
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
fascicolo: 1, volume: 33, anno: 2002,
pagine: 75 - 85
SICI:
1359-835X(2002)33:1<75:SFIASC>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTRONIC SPECKLE PHOTOGRAPHY; MAT-REINFORCED POLYPROPYLENE; DAMAGE MECHANISMS; GLASS; DISPLACEMENT; COMPOSITES; FRACTURE;
Keywords:
damage tolerance; mechanical properties; compression moulding; speckle photography;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Nilsson, G SICOMP AB, Box 271, SE-94126 Pitea, Sweden SICOMP AB Box 271 Pitea Sweden SE-94126 SE-94126 Pitea, Sweden
Citazione:
G. Nilsson et al., "Strain field inhomogeneities and stiffness changes in GMT containing voids", COMPOS P A, 33(1), 2002, pp. 75-85

Abstract

During compression moulding of glass mat thermoplastics (GMT), voids may form. However, it is not clear whether voids are as critical to mechanical performance in GMT as in thermoset composites. The present investigation also considers the general problem of damage mechanisms in GMT. Conventional tensile tests, acoustic emission, a stiffness degradation test and a speckletechnique for strain field measurements are used as well as optical microscopy of polished cross-sections. The void content (up to 5%) does not significantly influence the strength or stiffness degradation process. The reason is the large inhomogeneity of the strain fields in GMT. Failure occurs inlocally soft regions and void effects are of secondary importance. Detailsof the failure process are discussed, emphasising the large local strains in matrix-rich regions. (C) 2001 Published by Elsevier Science Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/07/20 alle ore 15:53:15