Abstract
AbstractThis article aims to improve the shear delamination resistance of composite laminate and minimize implantation damage on fiber orientation by using fine z‐pins. The z‐pins with the diameters as small as 0.1 and 0.2 mm were prepared by using different carbon fibers. The results show that z‐pinning method significantly improves the mode II interlaminar fracture toughness, and the GIIC value becomes larger with the decrease in z‐pin diameter. Compared with the control sample, the precracked GIIC values of (carbon fiber‐reinforced polymer composite) CFRP(0.5CF4X−pin), CFRP(0.2CF4X−pin), and CFRP(0.1CF4X−pin) increase by 67%, 142%, and 176%, respectively. As z‐pin diameter decreases from 0.5 to 0.1 mm, the failure mode changes from z‐pin pullout to shear fracture. The evolution of failure mode greatly enhances the resistance to crack propagation and the final GIIC value. The carbon fiber type of pin(0.5mm) has no obvious influence on the delamination sliding resistance. For pin(0.1mm) and pin(0.2mm), the strong deformation resistance of z‐pin is the dominant factor driving the improvement of the GIIC values though providing high‐shear traction load. In addition, the z‐pins with large shear deformation capacity can also enhance the crack sliding resistance.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
