Session: 01-01-01: General Topics of Aerospace Structures

Paper Number: 100771

100771 - Damage Control Measures in Composites: Bvid Damage Progression 

Damage control in composites is becoming one of the major topics of research as primary structures are transitioning to composites for the benefits of their lightweight, ease of manufacturability, and high strength-to-weight ratio. One of the major challenges with composites is the fact that there is still no accepted standard to define the damage and its propagation compared to well-studied metallic structures.

This is an ongoing research that follows the guidelines of national Agencies with the initiative to create an efficient simulation-based approach that would predict the potential initiation of damage propagation in a composite structure. The predictive analysis will incorporate the Onset method which is a physics-based methodology for assessing the onset of irreversible deformation. The Onset methodology utilizes the critical dilatation and distortion of the constituent materials of the composite material system. The assessment follows the micromechanical de-homogenization of the deformed composite material system. As a result, there is a limited dependency on parameters extracted from representative experiments.

The approach consists of extracting the critical dilatation and distortion for each constituent material from tested coupons, developing a sequence of statically indented coupon tests to simulate low-velocity impact damage, establishing the catastrophic load environments for the indented coupons subject to in-plane uniaxial compression, and numerically analyzing the indented coupons using the critical dilatation and distortion of the constituent materials to numerically derive the critical in-plane compression loads to the critical values of from test.

Presenting Author: Kais Jribi Embry-Riddle Aeronautical University

Presenting Author Biography: Kais Jribi is a Ph.D. candidate in Aerospace Engineering at Embry Riddle Aeronautical University. Kais Graduated from The National Aviation University in Kyiv, Ukraine with his Bachelor of aircraft maintenance engineering, and from Embry-Riddle with a Master's degree in aerospace engineering focused on structures and materials.
Kais is Currently working on damage control analysis in composite structures using the onset methodology to estimate the life expectancy of the material.

Authors:

Kais Jribi Embry-Riddle Aeronautical University
Jonathan H Gosse Computational Engineering Software, LLC
Douglas J Neill Computational Engineering Software, LLC
Alberto W Mello Embry-Riddle Aeronautical University