Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Schneider, Judy

Committee Member

Patton, Richard

Committee Member

Vizzini, Anthony J.

Date of Degree

12-10-2005

Document Type

Graduate Thesis - Open Access

Major

Mechanical Engineering

Degree Name

Master of Science

College

James Worth Bagley College of Engineering

Department

Department of Mechanical Engineering

Abstract

The objective of this research is to develop a test methodology to be used in determining which material properties affect the ultimate performance of a composite overwrapped pressure vessel (COPV) at liquid nitrogen (LN2) temperatures. The test methodology being evaluated is based on that used for ambient performance of COPVs and includes: resin properties, resin/fiber interface and COPV burst data. The suitability of these tests at LN2 temperatures will be evaluated. The resin properties are investigated by use of tensile tests to determine: strain to failure (%å), failure stress (óys), and elastic modulus (E). TThe objective of this research is to develop a test methodology to be used in determining which material properties affect the ultimate performance of a composite overwrapped pressure vessel (COPV) at liquid nitrogen (LN2) temperatures. The test methodology being evaluated is based on that used for ambient performance of COPVs and includes: resin properties, resin/fiber interface and COPV burst data. The suitability of these tests at LN2 temperatures will be evaluated. The resin properties are investigated by use of tensile tests to determine: strain to failure (%å), failure stress (óys), and elastic modulus (E). The resin/fiber interface is evaluated using short beam shear tests to determine the interlaminar shear strength (ILSS). These properties are compared with actual COPV burst pressures performed at ambient and LN2 temperatures. If a correlation can be found, this research lays the foundation for a method to quickly and efficiently screen candidate material systems for composite overwrapped pressure vessel (COPV) fabrication.he resin/fiber interface is evaluated using short beam shear tests to determine the interlaminar shear strength (ILSS). These properties are compared with actual COPV burst pressures performed at ambient and LN2 temperatures. If a correlation can be found, this research lays the foundation for a method to quickly and efficiently screen candidate material systems for composite overwrapped pressure vessel (COPV) fabrication.

URI

https://hdl.handle.net/11668/19190

Comments

Composite overwrapped pressrue vessels||cryogenic||polymer resins||mechanical testing

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