12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Open-hole tension strength of pultruded GRP plate.
View graph of relations

« Back

Open-hole tension strength of pultruded GRP plate.

Research output: Contribution to journalJournal article

Published

Journal publication date1/02/2003
JournalStructures & Buildings
Journal number1
Volume156
Number of pages9
Pages93-101
Original languageEnglish

Abstract

Strength data reported for over 100 tension coupons with central circular holes cut from pultruded glass reinforced plastic (GRP) plate have been used to determine the critical distance and the damage zone critical length according to the point stress and damage zone criteria respectively. It is shown that these quantities are not invariant, as required by the criteria. Indeed, they appear to depend on both geometry and loading direction relative to the principal material axes. It appears, therefore, that neither criterion is suitable for accurate prediction of the open-hole tensile strength of pultruded GRP plate, which is used in infrastructure applications.

Bibliographic note

The paper shows that the Point Stress and Damage Zone failure criteria (widely used to predict failure of laminated aerospace composites) are not applicable to pultruded GRP structural grade materials. This demonstrates that design procedures are not directly transferable from an advanced sector to a less advanced sector of engineering industry. The paper has been consulted by the US Steel Research & Technology Center (contact: jwang@uss.com). RAE_import_type : Journal article RAE_uoa_type : General Engineering