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Strain field inhomogeneities and stiffness changes in GMT containing voids
Swerea SICOMP AB, Box 271, 941 26, Piteå.
Luleå tekniska universitet.
Luleå tekniska universitet.
2002 (engelsk)Inngår i: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840, Vol. 33, nr 1, s. 75-85Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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 speckle technique 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 in locally soft regions and void effects are of secondary importance. Details of the failure process are discussed, emphasising the large local strains in matrix-rich regions.

sted, utgiver, år, opplag, sider
2002. Vol. 33, nr 1, s. 75-85
HSV kategori
Forskningsprogram
Polymera konstruktionsmaterial
Identifikatorer
URN: urn:nbn:se:ltu:diva-3634DOI: 10.1016/S1359-835X(01)00056-2ISI: 000172089300008Scopus ID: 2-s2.0-0036027391Lokal ID: 173a6480-c96b-11de-b769-000ea68e967bOAI: oai:DiVA.org:ltu-3634DiVA, id: diva2:976492
Merknad
Validerad; 2002; 20091104 (andbra)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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