Effect of Z-pin on the through-the-thickness strength of woven composite laminates

J. H. Son, H. J. Chun, K. T. Kang, H. Y. Lee, J. H. Byun, M. K. Um, S. K. Lee, B. S. Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Delamination failure occurs due to the out-of-plane loading because of the weakness in the thickness directional properties of composite materials. The z-pinned composite has been developed to overcome such a problem. In this study, the mechanical properties of z-pinned composite laminates were examined using the analytical model. The effects of z-pins on the strength in the thickness direction were investigated. Fibers in the laminate are gradually waved by the formation of resin rich zone caused by inserting the z-pins. A constitutive model was developed for the predictions of strengths of woven z-pinned composites. The changes in the strengths in the in-plane and out-of-plane directions of the woven z-pinned composites and the effects of controlling parameters such as the diameter of z-pin and densities of z-pin on the strengths were identified. It was found that the out-of-plane tensile strength increases 14% relative to that of composite without z-pins when the diameter of z-pin is 0.25 mm. However, the in-plane tensile strength and in-plane and out-of-plane shear strengths were reduced to 9%, 7% and 8%, respectively, over the strengths of composite without z-pins. Qualitatively good correlations are obtained between the results of the suggested model and the experiments.

Original languageEnglish
Title of host publicationMulti-Functional Materials and Structures III
Pages47-50
Number of pages4
DOIs
Publication statusPublished - 2010
Event3rd International Conference on Multi-Functional Materials and Structures, MFMS 2010 - Jeonju, Korea, Republic of
Duration: 2010 Sep 142010 Sep 18

Publication series

NameAdvanced Materials Research
Volume123-125
ISSN (Print)1022-6680

Other

Other3rd International Conference on Multi-Functional Materials and Structures, MFMS 2010
CountryKorea, Republic of
CityJeonju
Period10/9/1410/9/18

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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