Study on the Mode I Interlaminar Fracture Toughness of Multi-Directional Composite Laminates

Abstract:

The double cantilever beam (DCB) test method and the modified beam theory are adopted to investigate the Mode I interlaminar fracture toughness of multi-directional composite laminates. The test procedure was developed by using a stereoscopic microscope to observe the delamination front tip and a testing machine to record the displacement and load data. A dial indicator was used to eliminate the error due to initial clearance in the clamp. A modified beam theory and a compliance calibration method were used to calculate the interlaminar fracture toughness. The Mode I interlaminar fracture toughness of carbon fiber reinforced bismaleimide resin matrix (BMI) composite laminates with four different interface patterns ( 0/0, 45/-45, 0/-45 and 0/90, respectively) was obtained. The results show that the patterns of interface ply angles have an obvious influence on Mode I interlaminar fracture toughness of composite laminates.

• Periodical: Advanced Materials Research (Volumes 718-720)
• Pages: 186-190
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.718-720.186
• Online since: July 2013
• Authors: Zong Hong Xie, Xiang Li, Jian Zhao, Jie Hao, Yan Peng Sun, Xiao Dong Sui
• Keywords: Double Cantilever Beam, Energy Release Rate, Interlaminar Fracture Toughness, Mode I

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