Accession Number : AD0623317

Title :   THE EFFECTS OF SHAPE OF LOAD PULSE ON SHOCK-MITIGATING CHARACTERISTICS OF A STYROFOAM PLASTIC,

Corporate Author : TEXAS UNIV AUSTIN STRUCTURAL MECHANICS RESEARCH LAB

Personal Author(s) : Carr,Robert I. ; Perry,Ervin S. ; Ripperger,E. A. ; Thompson,J. Neils

Report Date : JUL 1965

Pagination or Media Count : 40

Abstract : The dynamic cushioning characteristics of confined specimens of Styrofoam HD-1 are presented in the form of stress-strain curves and stress-time curves. The specimens demonstrated identical stress-strain curves from various impulse loadings on the HYGE shock tester and from static tests. Variations in the rise time and pulse durations of the HYGE wave forms were accompanied by like variations in rise times and durations of the crushing stress-time curves. Styrofoam HD-1 crushed initially at approximately 46 psi and bottomed at about 50 per cent strain with an energy dissipation at bottoming of approximately 3 ft-lb per cubic inch. (Author)

Descriptors :   (*STYRENE PLASTICS, EXPANDED PLASTICS), (*EXPANDED PLASTICS, SHOCK(MECHANICS)), STRESSES, STRAIN(MECHANICS), LOADS(FORCES), COMPRESSIVE PROPERTIES, IMPACT SHOCK

Distribution Statement : APPROVED FOR PUBLIC RELEASE