On the in-plane deformability of cross-plied unidirectional prepreg
2011 (English)In: Journal of composite materials, ISSN 0021-9983, E-ISSN 1530-793X, Vol. 46, no 8, 929-939 p.Article in journal (Refereed) Published
The work presented herein aims to characterise the in-plane properties of cross-plied unidirectional prepreg using the bias extension method. The study is focusing on carbon fibre/epoxy material systems and testing is performed at elevated temperatures to enhance formability. Using digital image correlation (DIC), the specimen deformation and fibre rotation is captured during tests. The study shows that the cross-plied unidirectional material deforms at different characteristic length scales as deformation continues: first seemingly continuous and later in form of bands. Further, the different type of prepreg materials investigated behaves differently; for one type the pin-jointed net theory fit well, enabling simple estimation of resulting fibre angle, while for another not. Different loading speed, temperatures and layup methods are investigated in order to pin-point its influence on the deformability.
Place, publisher, year, edition, pages
Sage Publications, 2011. Vol. 46, no 8, 929-939 p.
prepreg, forming, multi-layer
Reliability and Maintenance Manufacturing, Surface and Joining Technology Materials Engineering Vehicle Engineering
Research subject SRA - Production
IdentifiersURN: urn:nbn:se:kth:diva-10677DOI: 10.1177/0021998311412988ISI: 000302010000006ScopusID: 2-s2.0-84859314024OAI: oai:DiVA.org:kth-10677DiVA: diva2:224714
ProjectsKostnadseffektiva kompositstrukturer (KEKS)NFFP Price
FunderXPRES - Initiative for excellence in production research
QC 201204242013-01-252009-06-222016-08-11Bibliographically approved