THE EVALUATION ON IMPACT STRENGTH OF STRUCTURAL ELEMENTS BY MEANS OF DROP WEIGHT TEST - ELASTIC RESPONSE AND ELASTIC LIMIT

A small and short impulsive load yields relatively small deformation and large stress on structural elements, but large and long impulsive loads yield large deformation. A sharp impulsive load may cause brittle fracture or fatigue on structural parts subjected to high stress concentration, and a large impulsive load also brings about ductile fracture or collapse. The response of structural elements to an impulsive load can be obtained by the dynamic analysis of a continuous model or spring-mass approximation. The recent progress of computers makes it possible to calculate dynamic response of actual structures. However, impact tests are important to obtain impulsive load and structural response in actual structures. In this paper, simply supported T-section beams, clamped square plates and restricted stiffened plates were tested using drop weight testing apparatus. The characteristics of impulsive load measured on long size impact bars used as the drop weight and deflection and strain of specimens were ascertained. Based on the test results and the elastic calculation using beam and plate/shell Finite Element Methods, simple methods with impact energy and impulse were proposed to estimate the impulsive load and deflection of structural elements.

• Supplemental Notes:
  • Soc Naval Arch Japan J, v 169, June 1991, p 355 [11 p, 15 ref, 6 tab, 22 fig]
• Authors:
  • Maenaka, H
  • Sakuma, M
• Publication Date: 1991

Language

• Japanese

Subject/Index Terms

• TRT Terms: Crash tests; Shock resistance
• Uncontrolled Terms: Impact strength; Transient loads
• Subject Areas: Marine Transportation; Research;

Filing Info

• Accession Number: 00703121
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM