Date of Award

Spring 2024

Access Type

Dissertation - Open Access

Degree Name

Doctor of Philosophy in Aerospace Engineering

Department

Aerospace Engineering

Committee Chair

Alberto Mello

First Committee Member

Habib Eslami

Second Committee Member

Birce Dikici

Third Committee Member

Sirish Namilae

College Dean

James W. Gregory

Abstract

Barely Visible Impact Damage (BVID) in composite materials presents a stealthy yet significant risk to structural integrity, particularly challenging due to its elusive nature. The approach adopted here diverges from traditional methodologies, focusing on the novel application of Digital Image Correlation (DIC) to map surface area changes during in-situ Compression After Impact (CAI) tests. This technique allows for an in-depth analysis of planar strains along the x and y axes, shedding light on the material's behavior under stress.

A pivotal advancement lies in developing a method for precisely identifying when BVID-induced delamination recommences. By meticulously analyzing strain pattern deviations along these axes, the onset of additional damage is accurately pinpointed, significantly improving predictive capabilities for delamination due to BVID. This approach enhances the structural integrity assessment of composite materials, bolstering safety measures.

The techniques and insights gained significantly contribute to advancing maintenance strategies and structural evaluation in aerospace composites by offering refined tools for early detection of BVID-induced damage.

Additional Files
24311795_2024_03_05_PhD Acceptance Form.pdf (339 kB)
GS9 Acceptance Form
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