High-Energy Low-Velocity Impact Behavior of Rubber-Coated Sandwich Composite Structure with Buoyancy Material Core: Experimental and Numerical Investigation
Yi Zhu, Zhiyuan Mei, Haitao Li, Hongbo Tao, Guotao Chen
TL;DR
This study examines how rubber-coated sandwich structures with buoyancy cores respond to high-energy low-velocity impacts, revealing how the rubber layer improves damage resistance.
Contribution
The novel contribution is identifying three distinct damage stages in rubber-coated sandwich composites and quantifying the rubber layer's impact on damage threshold.
Findings
The rubber layer increases damage threshold by approximately 100% compared to non-rubber-coated structures.
Three distinct damage stages were observed in rubber-coated sandwich composites during impact.
Structures with larger curvature exhibit higher initial stiffness and larger impact damage areas.
Abstract
The dynamic response and failure of rubber-coated sandwich composite structures with buoyancy material core (RC-BMC-SCS) subjected to high-energy low-velocity impacts were experimentally and numerically investigated. Six types of BMC-SCSs were designed and manufactured, and high-energy low-velocity impact experiments were performed. Based on the Mohr-Coulomb theory and the Ogden hyperelasticity constitutive model, a low-velocity impact finite element analysis model was developed. The results indicate that BMC-SCS damage stages could be divided into: (1) matrix damage, (2) core cracks, (3) debonding and fiber breakage. Three distinct damage stages of the RC-BMC-SCS were revealed: (1) rubber layer energy absorption, (2) core cracks, (3) debonding. The rubber layer can enhance the damage threshold by approximately 100% compared to BMC-SCS. However, rubber energy absorption capacity has an…
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Taxonomy
TopicsMechanical Behavior of Composites · Structural Integrity and Reliability Analysis · Mechanical stress and fatigue analysis