Abstract
The primary objective of this work is to demonstrate how the condition for biaxially loaded off-axis tunnelling crack growth can be reproduced in a modified laminate under uniaxial loading. More specifically, laminates with the stacking sequences [0/θ/0/-θ]s and [0/α/0/-α]s have been considered for the biaxial and uniaxial loadings, respectively. A steady-state crack growth condition is analysed for an isolated off-axis tunnelling crack. The crack tip stress state is expressed in terms of a through thickness averaged mode mixity and energy release rate. The presented framework uses an energy accounting method with the crack opening displacements extracted from a finite element analysis. Results shows that the tunnelling crack tip stress state of the modified laminate under uniaxial loading matches with the biaxially loaded laminate. With a modified off-axis lamina orientation and the additional load amplitude from the biaxially loaded laminate, a simplified uniaxial testing laminate can be designed that yields the same biaxial tunnelling crack tip conditions.
Original language | English |
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Article number | 012032 |
Journal | IOP Conference Series: Materials Science and Engineering |
Volume | 942 |
Issue number | 1 |
Number of pages | 8 |
ISSN | 1757-8981 |
DOIs | |
Publication status | Published - 2020 |
Event | 41st Risø International Symposium on Materials Science - Online event, Denmark Duration: 7 Sep 2020 → 10 Sep 2020 |
Conference
Conference | 41st Risø International Symposium on Materials Science |
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Country | Denmark |
City | Online event |
Period | 07/09/2020 → 10/09/2020 |