ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Traditional laminate strength analysis only considers face failure under in-plane loads. Infact, owing to the mismatch of the mechanical properties of the adjacent layers, a three-dimensionalinterlaminar singular stress fields develop in a small boundary region in the vicinity of the freeedges of the laminate under mechanical load, which may lead to interlaminar delamination failure.Neglecting this interlaminar failure mode, the failure strength of laminate will be overestimated. Inthis paper, face failure and interlaminar failure are both considered. So for a lamina, three majorfailure modes are considered: matrix failure, fiber breakage and delamination. Finite elementmethod is used to obtain the stresses in a laminate under mechanical loads. Stress-based criterionsare adopted to predict the failure mode of laminas. When a lamina is failed, the lamina stiffness isreduced according to the corresponding failure mode, and the stresses of the laminate arere-analyzed. This procedure is repeatedly performed until the whole laminate fails and thus theultimate strength is determined. The predicted ultimate strengths are in good agreement withexperiment results in the open literature
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.771.pdf
Permalink