Award Date

1-1-2005

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Mechanical Engineering

First Committee Member

Mohamed B. Trabia

Second Committee Member

Brendan J. O'Toole

Number of Pages

125

Abstract

Electronic components within a projectile are subjected to severe loads over extremely short duration. Failure of these components is likely to have negative implications to projectile or mission. While experimental data can be helpful in understanding the failure phenomena, collecting such data is difficult. There are also limitations on the reliability of shock sensors under these circumstances. Finite Element Modeling can offer a means to better understand the behavior of these components. It can also be used to design better techniques to mitigate the shocks these components are subjected to. A model of a projectile and gun barrel is presented. The model is subjected to a realistic launch pressure time-history. The projectile is modified to include a one-pound mass that represents a typical electronic package. The electronic package is supported by a steel plate. Efforts were put in this research to find a suitable material that reduces the shock transmitted to the 1-pound payload. A composite material with carbon fiber reinforced in an epoxy matrix has been considered to start with. The effect of fiber volume fraction has been studied by varying it from 30%-70%. The model includes effects of friction between the gun barrel and projectile. Effects of the flexibility of the gun barrel and its boundary conditions are also considered. A parametric study of the effects of changing the thickness of the supporting plate on acceleration transmitted to the electronic package within and outside the gun barrel is presented. Sensitivity of payload mounting location is also studied.

Keywords

Components; Electronic; Methods; Projectile; Reduction; Shock

Controlled Subject

Mechanical engineering

File Format

pdf

File Size

3645.44 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

Permissions

If you are the rightful copyright holder of this dissertation or thesis and wish to have the full text removed from Digital Scholarship@UNLV, please submit a request to digitalscholarship@unlv.edu and include clear identification of the work, preferably with URL.

Rights

IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/

Download


COinS