Development and Experimental Verification of Procedures to Determine Nonlinear Load-Deflection Characteristics of Helicopter Substructures Subjected to Crash Forces. Volume 1. Development of Simplified Analytical Techniques to Predict Typical Helicopter Airframe Crushing Characteristics and the Formulation of Design Procedures

Abstract

The results of a study to develop simplified design procedures for determining nonlinear load-deflection characteristics for helicopter airframe structures are presented in a two-volume report. Volume one describes 60 technical reports and papers with regard to their applicability to crashworthiness analysis and designer-oriented procedures. Studies were made using an existing 31 lumped mass model of the UH-1H helicopter to determine the sensitivity of responses to changes in load-deflection representations. Twelve transmission pylon specimens were fabricated and static and dynamic tests were performed.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1974
Accession Number
AD0784191

Entities

People

  • G. Wittlin
  • K. C. Park

Organizations

  • Lockheed Martin

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Airframes
  • Computer Programming
  • Computer Programs
  • Dynamic Tests
  • Failure Analysis
  • Failure Mode And Effect Analysis
  • Fuselages
  • Geometry
  • Helicopters
  • Landing Gear
  • Literature Surveys
  • Load Cells
  • Mechanical Working
  • Mechanics
  • Spars
  • Test And Evaluation

Fields of Study

  • Engineering
  • Physics

Readers

  • Aerospace Engineering
  • Software Engineering
  • Structural Dynamics.