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Titolo:
FLEXURAL STRENGTH AND INTERLAMINAR SHEAR-STRENGTH OF STITCHED GRP LAMINATES FOLLOWING REPEATED IMPACTS
Autore:
MOURITZ AP; GALLAGHER J; GOODWIN AA;
Indirizzi:
DEPT DEF,DSTO,AERONAUT & MARITIME RES LAB,POB 4331 MELBOURNE VIC 3001AUSTRALIA MONASH UNIV,DEPT MAT ENGN CLAYTON VIC 3168 AUSTRALIA
Titolo Testata:
Composites science and technology
fascicolo: 5, volume: 57, anno: 1997,
pagine: 509 - 522
SICI:
0266-3538(1997)57:5<509:FSAISO>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
COMPOSITE-MATERIALS; DELAMINATION RESISTANCE; POLYMER COMPOSITES; CFRP; PREDICTION; TOUGHNESS; FRACTURE; MATRIX; PLATES;
Keywords:
GRP LAMINATES; STITCHING; IMPACT; FLEXURAL STRENGTH; APPARENT INTERLAMINAR SHEAR STRENGTH;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
48
Recensione:
Indirizzi per estratti:
Citazione:
A.P. Mouritz et al., "FLEXURAL STRENGTH AND INTERLAMINAR SHEAR-STRENGTH OF STITCHED GRP LAMINATES FOLLOWING REPEATED IMPACTS", Composites science and technology, 57(5), 1997, pp. 509-522

Abstract

The flexural strength and interlaminar shear strength of stitched andnon-stitched glass-reinforced plastic (GRP) laminates were studied under conditions of increasing impact energy and increasing number of repeated impacts. The GRP was stitched through the thickness with Kevlarthread in two orientations with a low or high stitch density. The Mode I interlaminar fracture toughness, G(Ic), increased with stitch density whereas the Mode II toughness, G(IIc), was not changed by stitching. The three-point flexural strength and short-beam interlaminar shearstrength of the GRP before impact loaning were reduced by stitching as a result of stitching damage. Under short-beam lending, the stitchesbecome sires of stress concentration and this contributed to the reduction in interlaminar shear strength. The strengths of the laminates were reduced slightly with increasing impact energy after one impact. The strengths were reduced considerably with increasing number of impacts. The laminates suffered severe microstructural damage under repeated impacts, including shear cracking of the resin, delaminations, and crushing and fracture of the glass fibres. The impact damage resistance, the post-impact flexural strength and the interlaminar shear strength of the GRP were nor improved by stitching, and this finding differs from other impact studies on stitched composites. (C) 1997 Elsevier Science Limited.

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Documento generato il 27/09/20 alle ore 22:43:05