200. high energy, wide area blunt impacts in carbon fiber reinforced aerospace structures

Department: Structural Engineering
Faculty Advisor(s): Hyonny Kim

Primary Student
Name: Chaiane Wiggers De Souza
Email: cwiggers@ucsd.edu
Phone: 858-539-6762
Grad Year: 2020

Abstract
High energy, wide area blunt impacts (HEWABI) are the most common type of impacts that occur in commercial aviation, being accounted for over 50% of all impacts. Due to its wide-spread nature and often lack of external visibility, determining damage location, extension and mode is a complex task, nonetheless crucial to ensure aircraft safety. However, high material and manufacturing costs call for usage of advanced computational techniques - in this research, Finite Element Analysis (FEA). In order to validate conclusions drawn from FEA, testing is required. The past year in this project has been dedicated to a new specimen design, which includes more realistic features, such as continuous shear ties and floor region modeling. Design started considering a quarter-barrel model of the fuselage, which was simplified; assignment of appropriate boundary conditions allowed to reduce specimen size, granting a larger number of specimens and possibility to understand influence of different design parameters (for instance, layup and thickness), and varying locations and impact speed. Ultimately, results will be used to feed regulatory agencies and industry with data regarding damage prediction and design for external visibility.

Industry Application Area(s)
Aerospace, Defense, Security | Civil/Structural Engineering | Materials

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