Notch Stress Concentrations and Failure Characteristics in Laminates with Triple Parallel Notches

Abstract

This paper deals with stress concentrations in laminates with triple parallel-arranged and equally spaced notches. By the use of the finite-element method, the stress concentration factors at points on the boundary of a notch were calculated for unidirectional and cross-ply laminates and for isotropic plates with surface or through notches. It was found that the stress concentration factors near the notch change from high to low then revert to high with spacing between both neighboring notches for all the calculated cases. A series of failure tests on carbon-fiber/epoxy laminate specimens with triple notches were conducted. The test results validated the calculated results. (C) 2000 Elsevier Science Ltd. All rights reserved. This paper deals with stress concentrations in laminates with triple parallel-arranged and equally spaced notches. By the use of the finite-element method, the stress concentration factors at points on the boundary of a notch were calculated for unidirectional and cross-ply laminates and for isotropic plates with surface or through notches. It was found that the stress concentration factors near the notch change from high to low then revert to high with spacing between both neighboring notches for all the calculated cases. A series of failure tests on carbon-fiber/epoxy laminate specimens with triple notches were conducted. The test results validated the calculated results.

Department(s)

Mechanical and Aerospace Engineering

International Standard Serial Number (ISSN)

0266-3538

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2000 Elsevier, All rights reserved.

Publication Date

01 Jan 2000

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