Interlaminar Shear Property of Z-Pins Reinforced Woven Ceramic Matrix Composites

Abstract:

Z-pins reinforced 2D ceramic matrix composites (CMCs), integratedly designed new materials, are developed to enhance 2D CMCs through-thickness in the form of Z-pins and to ensure significant increase in interlaminar fracture toughness, delamination resistance and impact resistance, and Z-pins reinforced 2D CMCs have much application. Finite element method was adopted to analyze stress distributions of Z-pins reinforced woven CMCs; the interlaminar shear tests were employed to measure interlaminar shear strength; fractographies were observed to examine failure mechanisms. The results are shown as the following: the insertion of Z-pins reduces concentrated stress fields and enhances the uniform stress distribution on the expected fracture plane. Interlaminar shear strength of Z-pins reinforced woven CMCs is increased as Z-pins insertion reaches a certain number. Interlaminar shear strength goes up with the rise of the number of inserted Z-pins. Z-pins shearing and fabric/matrix debonding are interlaminar failure mechanisms of Z-pins reinforced CMCs.

• Periodical: Advanced Materials Research (Volumes 197-198)
• Pages: 1608-1612
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.197-198.1608
• Online since: February 2011
• Authors: Wei Liu, Gui Qiong Jiao, Wei Xi Zhang, Wei Min Zhang
• Keywords: Ceramic Matrix Composite (CMC), Double Notch Shear (DNS), Finite Element Analysis (FEA), Interlaminar Shear Property, Z-PiN

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