Date of Award

Summer 1999

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Mechanical & Aerospace Engineering

Program/Concentration

Aerospace Engineering

Committee Director

Chuh Mei

Committee Director

Norman F. Knight

Committee Member

Donald L. Kunz

Call Number for Print

Special Collections; LD4331.E535 L39

Abstract

Impact and penetration events for uncontained engine debris on fuselage skins are simulated using the LS-DYNA3D finite element analysis code. The LS-DYNA3D code is a nonlinear transient dynamic simulation tool with contact algorithms for impact. A finite element analysis is used to simulate the penetration of aluminum plates impacted by titanium impactors on aircraft-like skin panels. By gaining a more comprehensive understanding of this dynamic impact event, this work is meant to contribute to improving designs for damage tolerance and residual strength by providing modeling and analysis guidelines for the analyst.

Parametric studies are performed to determine the influence of various modeling and physical factors on the structural response. LS-DYNA3D is used to model the impactor, test frame and target plate. Modeling factors include the tied-nodes-with- failure and element-erosion modeling strategies for penetration, mesh refinement near impactor and target plate and contact surface modeling. Physical factors include initial velocity of the impactor, material damage models, and mass of the impactor. The effects of mesh refinement, contact modeling, and impactor pitch and roll angles are studied.

Rights

In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

DOI

10.25777/sece-fy47

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