Volume 25, Issue 1 (January 2024)                   Modares Mechanical Engineering 2024, 25(1): 55-63 | Back to browse issues page


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gerami A, vahidi H, ahmadi H, liaghat G. Experimental Analysis of Impact Loading on Sandwich Panels with Glass/Epoxy Composite Faces and Cork Core. Modares Mechanical Engineering 2024; 25 (1) :55-63
URL: http://mme.modares.ac.ir/article-15-79035-en.html
1- TARBIAT MODARES UNIVERCITY
2- Tarbiat Modares University , h_ahmadi@modares.ac.ir
Abstract:   (145 Views)

This research experimentally investigates the effect of cork layer configuration on the Impact loading behavior of glass/epoxy hybrid composites. Three types of specimens were fabricated and subjected to a 9.32 g spherical projectile impact test: GE8 (8-layer glass/epoxy composite without cork), LSPC1 (with 1 mm thick cork layers alternating between glass fiber layers), and SPC (with a 3 mm thick cork layer in the center). The results showed that the LSPC1 specimen exhibited significantly higher ballistic resistance, with the highest ballistic limit velocity (135 m/s). Furthermore, this specimen demonstrated the lowest damage (including bulging, petaling, and delamination) and the highest energy absorption (84.9 J). This superior performance is attributed to the uniform distribution of thin cork layers, multi-stage energy absorption at multiple fiber/cork interfaces, plastic deformation of cork cells under buckling and crushing, and crack growth resistance. This study demonstrates that the use of thin and alternating cork layers is an effective strategy to significantly improve the ballistic resistance of glass/epoxy composites and highlights the importance of engineered layup design for achieving optimal impact performance. The findings of this research can be used in the design and manufacturing of lightweight and impact-resistant structures in the aerospace, automotive, and protective equipment industries

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Article Type: Original Research | Subject: Impact Mechanics
Received: 2025/01/16 | Accepted: 2025/03/11 | Published: 2024/12/30

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