Filters
Results 1 - 1 of 1
Results 1 - 1 of 1.
Search took: 0.015 seconds
Herwan, Jonny; Kondo, Atsushi; Morooka, Satoshi; Watanabe, Naoyuki, E-mail: jonny-herwan@ed.tmu.ac.jp2016
AbstractAbstract
[en] Stitching technique improves both mode I and mode II delamination toughness significantly by reducing the opening and sliding displacement, respectively. However, measuring mode II delamination behaviour of stitched composites using three point end notched flexure test (ENF) is facing a serious problem where the premature failure of specimen occurs prior to delamination propagation. This work is addressed to conduct numerical study of four points end notched flexure (4ENF) test of stitched composites. Four models were simulated including unstitched unidirectional, unstitched multidirectional laminate, stitched multidirectional laminate with and without tabs on top and bottom of specimen. Furthermore, stitch threads were modelled using spring connectors with user define force-displacement relationship. Load-displacement and crack propagation length vs. displacement curves were plotted. Stress distributions across the thickness were also presented to recognize the possibility of specimen damage during the test. The results showed that simple 4ENF test seems to be quite enough for evaluating mode II critical energy release rate (GIIC) at the initial crack length of 35mm. However to evaluate R-curves (GII vs. crack propagation length) of stitched multidirectional laminate, tabbed 4ENF test specimen is recommended. (paper)
Primary Subject
Source
4. international conference on advanced composites and materials technologies for arduous applications (ACMTAA); Wrexham (United Kingdom); 5-6 Nov 2015; Available from http://dx.doi.org/10.1088/1757-899X/153/1/012004; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Literature Type
Conference
Journal
IOP Conference Series. Materials Science and Engineering (Online); ISSN 1757-899X;
; v. 153(1); [11 p.]

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue