Simulation of the Dynamic Tensile Characteristics of Nylon Parachute Materials

Abstract

The empirical development of nylon material subroutines for use in computer analysis of parachute system dynamics is discussed. The subroutines account for material plasticity, creep and hysteresis. They predict peak forces and strains accurately (+ or - 5%) and are valid over broad ranges of strain rate (three decades) and tensile load (zero to minimum breaking strength). The strain rate sensitivity of nylon is shown to be a manifestation of material creep. Previous models are simplistic by comparison and have been, in general, unsatisfactory. A package of data processing computer programs also developed provides the capability to quickly generate additional subroutines for similar materials from limited test data.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1978
Accession Number
ADA063497

Entities

People

  • Robert E. Mccarty

Organizations

  • Flight Dynamics Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Human Systems
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acquisition
  • Air Force
  • Computer Programs
  • Computers
  • Creep
  • Data Acquisition
  • Data Processing
  • Databases
  • Dynamic Tests
  • Impact Tests
  • Materials
  • Materials Laboratories
  • Mechanical Properties
  • Plastic Explosives
  • Test Fixtures
  • Test Methods
  • Vehicle Equipment

Readers

  • Computer Science.
  • Mechanical Engineering/Mechanics of Materials.
  • Systems Analysis and Design