Accession Number : ADA119497

Title :   Work-in-Progress Presented at the Army Symposium on Solid Mechanics, 1982 - Critical Mechanics Problems in Systems Design.

Descriptive Note : Final rept.

Corporate Author : ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA

PDF Url : ADA119497

Report Date : Sep 1982

Pagination or Media Count : 89

Abstract : In this report we discuss the work performed on the main component of the suspension system, the torsion bars. Torsion bars in the tank are designed to be mainly subjected to torsional loads, however, actual loading is feared to have some other stress components. In the first phase of the failure analysis, a bar which failed in the field was obtained. The examinations performed on the bar were: Magnetic flux examination of both parts of the failed bar, to determine any other cracks; Chemical analysis to evaluate conformity with the standards; Standard charpy specimens, for evaluating transition temperature; Pre-cracked charpy to evaluate fracture toughness; Tension test; Short-rod fracture specimen for evaluating fracture toughness; Rockwell hardness traverse; Fractographic examination of fracture surface, (a) light microscopy SEM, to locate the origin of cracks and the extent of fatigue crack growth, and Metallurgical Examination of Crystalline Structure in the gage and spline area.

Descriptors :   *Mechanics, *Structural engineering, *Metallurgy, *Mechanical properties, Ordnance, Symposia, Research management, Defects(Materials), Charpy impact tests, Cracking(Fracturing), Crack propagation, Failure(Mechanics), Fatigue(Mechanics), Thermal properties, Composite materials, Residual stress, Diffusion bonding, Titanium, Ballistics, Silicon carbides, Elastic properties, Plastic flow, Shelters, Buildings

Subject Categories : Administration and Management
      Information Science
      Metallurgy and Metallography
      Structural Engineering and Building Technology
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE