Micro-mechanical approach for the vibration analysis of CFRP laminates under impact-induced damage

Abstract

This paper deals with modeling the e↵ect of low-velocity impact damage upon the vibration response of CFRP laminates through a micro-mechanical description of the induced internal damage. The serial-parallel (SP) continuum approach is used to estimate the map of induced internal damage by considering the micro-structural interaction between the composite constituents and modifying their constitutive performance through a continuum damage formulation. An eigenvalue analysis is then done to determine the modal response of impacted laminates. The validity of the modeling approach to successfully reproduce the vibration response of impacted coupons is assessed through a comparison with an experimental test series conducted on a set of 48 CFRP laminated coupons. The results confirm the ability of the described approach in comparison to competing ones used to reproduce the experimentally observed behaviour.

Analysis of damage and interlaminar stresses in laminate plates with interacting holes

“…In addition, it allows the use of different behaviours for compression and tension, or different constitutive equations for fibre and matrix. The S/PMT has been successfully applied to predict failure initiation due to microbuckling in laminates under compressive loads [22] and delamination [23] vibrations problems [24,25]. The S/PMT has not been used to study the influence of the interlaminar stresses in problems with stress concentration in situations where several holes are present.…”

A Three-Phase Model Characterizing the Low-Velocity Impact Response of SMA-Reinforced Composites under a Vibrating Boundary Condition

“…Only the vibration response during and after an impact can be observed to evaluate the impact resistance and damage state [29,30]. In Pérez’s work, damage to a carbon fiber reinforced polymer (CFRP) induced by a low-velocity impact, and its effect on the vibration response, was investigated by a micro-mechanical approach [31].…”