Location

La Jolla ,CA

Start Date

1-1-1989 12:00 AM

Description

Significant efforts are being made to improve the safety of the solid rocket motor (SRM) for the shuttle. The SRM is a laminated structure consisting of four layers of materials: a steel casing, bonded to NBR insulation, the liner, and the propellant. One of the candidate inspection techniques is a thermal technique which analyzes the response of the SRM to an external heat source for detection of disbonds at the interfaces between the steel, NBR and fuel. Computational simulations of experimental measurements can provide limits of the effectiveness of the technique and easily assume a variety of different defect geometries to determine their detectability without the expense of making many different samples. Simulations can also provide useful information for the experimenter including the heating protocol that will provide the greatest contrast and the typical flaw size that can be detected.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

8A

Chapter

Chapter 3: Interpretive Signal and Image Processing

Section

Utilization of Numerical Methods

Pages

801-809

DOI

10.1007/978-1-4613-0817-1_100

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

A Numerical Grid Generation Scheme for Thermal Simulations in Laminated Structures

La Jolla ,CA

Significant efforts are being made to improve the safety of the solid rocket motor (SRM) for the shuttle. The SRM is a laminated structure consisting of four layers of materials: a steel casing, bonded to NBR insulation, the liner, and the propellant. One of the candidate inspection techniques is a thermal technique which analyzes the response of the SRM to an external heat source for detection of disbonds at the interfaces between the steel, NBR and fuel. Computational simulations of experimental measurements can provide limits of the effectiveness of the technique and easily assume a variety of different defect geometries to determine their detectability without the expense of making many different samples. Simulations can also provide useful information for the experimenter including the heating protocol that will provide the greatest contrast and the typical flaw size that can be detected.