Accession Number : ADA325875

Title :   Certification of Composite Aircraft Structures Under Impact, Fatigue and Environmental Conditions. Part 1-Low Speed Impact of Plates of Composite Materials.

Descriptive Note : Final contract rept. 1 Jul 76-31 Dec 77,

Corporate Author : DREXEL UNIV PHILADELPHIA PA

Personal Author(s) : Chou, Pei C. ; Flis, William J. ; Miller, Harry

PDF Url : ADA325875

Report Date : JAN 1978

Pagination or Media Count : 233

Abstract : This report presents a series of design curves which give the peak strain in several types of simple structures (beams and plates) due to low velocity impact. These curves have been developed based on both analytical solutions of impact and numerous impact experiments. It is shown that all impact problems may be divided into two regimes based on the ratio of the mass of the structure to the mass of the impactor. For large impactors, multiple impacts occur and the structural response depends chiefly on the kinetic energy of the impactor. For small impactors only a single impact occurs. Its force and duration determined chiefly by contact effects and the impactor momentum governs the response. Thus different forms of design curves are required for each regime.

Descriptors :   *COMPOSITE MATERIALS, *IMPACT TESTS, *PLATES, *STRUCTURAL RESPONSE, *COMPOSITE AIRCRAFT, RATIOS, BEAMS(STRUCTURAL), COMPOSITE STRUCTURES, LOW VELOCITY, KINETIC ENERGY, MOMENTUM, FATIGUE TESTS(MECHANICS).

Subject Categories : Aircraft
      Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE