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Media type:
E-Article
Title:
Defect Controlled Water Jet Piercing of Continuous Fiber Reinforced Plastics
Contributor:
Machida, T.;
Ramkumar, J.
imprint:
SAGE Publications, 2008
Published in:Advanced Composites Letters
Language:
English
DOI:
10.1177/096369350801700203
ISSN:
2633-366X
Origination:
Footnote:
Description:
<jats:p> Water jet piercing of composite laminates finds a wide application in varying fields of manufacturing, but has an inherent problem of delamination which restricts its usage. This paper makes an attempt to successfully make smaller diameter holes using impulse water jet. Both experimental and theoretical results confirmed that while piercing of composite laminates using water jet the defects appear in between the layers of laminates which may be due to bending moment of the bottom plies, which is because of the high pressure jet involved in piercing process. As the hole progresses the bottom layer delaminates from the previous layers which can be analogized to a simple supported beam in the initially stages and finally this gets converted into a cantilever beam at the bore edges. These defects can be effectively prevented by supporting the work material behind the cut edges with a thick plate having a bore smaller than that of the nozzle. </jats:p>