Hysteresis and Acoustic Emission as Non-Destructive Measures of the Fatigue Process in Metals.

Abstract

Metal fatigue is a result of a cumulative damage process due to repeated cyclic loading which causes premature and unpredictable failure. It is a complicated metallurgical process at the microscopic level which is difficult to accurately explain or model. Despite the complexities, fatigue analysis methods have been developed and are being developed to facilitate fatigue damage assessment and the prediction of fatigue life. This research project is concerned with the behavior of metals subjected to cyclic loading carried to failure. The purpose of this investigation is to develop a relationship between hysteresis loss, hysteresis loop drift, strain amplitudes and the number of cycles to failure; and to correlate this phenomenological description of the fatigue process with mesoscopic observables such as acoustic emission and stress-induced magnetization.(MM)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Mar 31, 1995
Accession Number
ADA295602

Entities

People

  • Guralnick

Organizations

  • Illinois Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Emissions
  • Civil Engineering
  • Computer Programs
  • Data Acquisition
  • Emission
  • Engineering
  • Engineers
  • Fatigue Tests (Mechanics)
  • Materials
  • Materials Science
  • Measurement
  • Mechanical Engineering
  • Mechanics
  • Modulus Of Elasticity
  • Stress Strain Relations
  • Stresses
  • Structural Engineering

Readers

  • Computational Modeling and Simulation
  • Materials Science and Engineering.
  • Structural Health Monitoring of Composite Structures.