Accession Number : AD0741895

Title :   Dynamic Response of Thin Shells to Suddenly Applied Loads.

Descriptive Note : Final scientific rept. 1967-1971,

Corporate Author : CALIFORNIA UNIV SAN DIEGO LA JOLLA DEPT OF THE AEROSPACE AND MECHANICAL ENGINEERING SCIENCES

Personal Author(s) : Prager,W. ; Nachbar,W.

Report Date : MAR 1971

Pagination or Media Count : 10

Abstract : Aerospace structures are increasingly being exposed to dynamic environments in which loads are applied with very short rise times, or with high intensity over short duration. Characteristic times range from 10 to the minus 6th power seconds typical for HE down to 10 to the minus 9th power seconds or less for laser and other electromagnetic radiation. Thin-walled structures can buckle dynamically under such impulsive loading; generation of stress waves in thicker structures causes damage by cracking, debonding, delamination or spallation. The long-range objective of the research is to study these mechanical and thermomechanical effects with two optimization problems in mind: (a) the 'defensive' problem of determining the optimum structural design to minimize damage under a given class of loading; (b) the 'offensive' problem of optimizing the load to cause maximum damage, or critical damage at a minimum cost, to a given class of structures. (Author)

Descriptors :   (*SHELLS(STRUCTURAL FORMS), LOADS(FORCES)), OPTIMIZATION, BUCKLING, REVIEWS

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE