Proceedings of the Army Symposium on Solid Mechanics, 1982 - Critical Mechanics Problems in Systems Design. Supplement
Proceedings of the Army Symposium on Solid Mechanics, 1982 - Critical Mechanics Problems in Systems Design. Supplement

Author:

Publisher:

Published: 1982

Total Pages: 27

ISBN-13:

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The U.S. Army at Natick (NLABS) is presently conducting a program to develop a nuclear hardened, mobile, tactical shelter which would be used to house C3 systems. As part of this program, a prototype shelter was designed to withstand a blast loading corresponding to a 10.0 psi (68.9-kPa) incident overpressure. The hardened shelter was then constructed, instrumented and subjected to a simulated nuclear blast loading at the MILL RACE test, White Sands Missile Range, New Mexico. The principal objectives of the test were to evaluate analytical methods for predicting shelter structural effects and shelter overturning effects induced by blast loading and to assess the validity of a particular design concept using conventional materials. Comparison of measured predicted values of shelter wall strain and shelter overturning motion confirm the validity of the analytical methods used. Test results demonstrated that a design featuring shear stiffened sandwich panels with aluminum face materials could withstand a nominal 10.0 psi incident shock loading. (Author).

Work-in-Progress Presented at the Army Symposium on Solid Mechanics, 1982 - Critical Mechanics Problems in Systems Design
Work-in-Progress Presented at the Army Symposium on Solid Mechanics, 1982 - Critical Mechanics Problems in Systems Design

Author: ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA.

Publisher:

Published: 1982

Total Pages: 89

ISBN-13:

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In this report we discuss the work performed on the main component of the suspension system, the torsion bars. Torsion bars in the tank are designed to be mainly subjected to torsional loads, however, actual loading is feared to have some other stress components. In the first phase of the failure analysis, a bar which failed in the field was obtained. The examinations performed on the bar were: Magnetic flux examination of both parts of the failed bar, to determine any other cracks; Chemical analysis to evaluate conformity with the standards; Standard charpy specimens, for evaluating transition temperature; Pre-cracked charpy to evaluate fracture toughness; Tension test; Short-rod fracture specimen for evaluating fracture toughness; Rockwell hardness traverse; Fractographic examination of fracture surface, (a) light microscopy SEM, to locate the origin of cracks and the extent of fatigue crack growth, and Metallurgical Examination of Crystalline Structure in the gage and spline area.