Accession Number : ADA089445

Title :   Penetration Mechanics of Textile Structures

Descriptive Note : Technical rept.

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE

Personal Author(s) : Roylance, David ; Wang, Su-Su

PDF Url : ADA089445

Report Date : JUN 1979

Pagination or Media Count : 154

Abstract : This report reviews those aspects of wave propagation and dynamic fracture relevant to the penetration mechanics of textile structures intended for use in personnel ballistic protection, and then describes the development and implementation of numerical analyses for use in instances for which closed- form analyses are intractable. These numerical treatments are used to assess the manner in which fiber material properties influence ballistic resistance, and this is done by performing simulations of missile impact on four fabrics of actual interest: ballistic nylon, Kevlar 29, Kevlar 49, and graphite. Following this parametric materials study, the numerical treatment is extended to include the effect of linear and non-linear viscoelastic relaxation on fabric response to impact. Finally, a special purpose computer code is described which was developed to study stress wave effects occurring at fiber crossovers.

Descriptors :   *POLYAMIDE PLASTICS, *COMPOSITE STRUCTURES, *TEXTILES, *BODY ARMOR, *PENETRATION, STRESSES, GUIDED MISSILES, FIBERS, MECHANICAL PROPERTIES, GRAPHITE, STRESS RELAXATION, TRANSVERSE, BALLISTICS, FABRICS, STRAIN(MECHANICS), NUMERICAL ANALYSIS, IMPACT TESTS, PANELS, VISCOELASTICITY, NYLON

Subject Categories : Laminates and Composite Materials
      Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE