An experimental investigation of fracture modes and delamination behavior of carbon fiber reinforced laminated composite materials
1
Department of Polymers and Petrochemical Industries, Faculty of Materials Engineering, University of Babylon, Iraq
2
Department of Prosthetics and Orthotics, Faculty of Engineering, University of Karbala, Iraq
Submission date: 2022-09-23
Final revision date: 2022-11-23
Acceptance date: 2022-11-24
Online publication date: 2022-12-01
Publication date: 2023-01-02
Corresponding author
Mustafa Abdul Hussein Musafir
Department of Polymers and Petrochemical Industries, Faculty of Materials Engineering, University of Babylon, Iraq
Department of Polymers and Petrochemical Industries, Faculty of Materials Engineering, University of Babylon, Iraq
Diagnostyka 2023;24(1):2023101
KEYWORDS
TOPICS
ABSTRACT
Mechanically, composite laminates perform exceptionally well in-plane but poorly out-of-plane. Interlaminar damage, known as "delamination," is a major issue for composite laminates. Results from Mode-I and Mode-II experimental testing on twill-woven carbon fiber reinforced (CFRP) laminates are analyzed in this paper. Composite Mode-I fracture toughness was determined using three different methods in accordance with ASTM D5528: modified beam theory, compliance calibration, and a codified compliance calibration. Two methods, the Compliance Calibration Method and the Compliance-Based Beam Method, were used to determine the Mode-II fracture toughness in accordance with ASTM D7905. Stick-slip behavior is quite evident in the composite's Mode-I fracture toughness test findings. The MBT technique's GIc values for initiation and propagation are 0.533 and 0.679 KJ/m2, respectively. When comparing the MBT approach to the industry-standard ASTM procedure for determining fracture toughness Mode-I, the MBT method was shown to be highly compatible. Furthermore, the GIIc values for the CBBM technique are 1.65 KJ/m2 for non-pre cracked and 1.4 KJ/m2 for pre-cracked materials. The CBBM method shows a good method to evaluate fracture toughness Mode-II, due to not needing to monitor the length of the crack during delamination growth to get the value of the fracture toughness.
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