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Generalized energy failure criterion.

R T Qu1, Z J Zhang1, P Zhang1

  • 1Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, P.R. China.

Scientific Reports
|March 22, 2016
PubMed
Summary
This summary is machine-generated.

Scientists have discovered a universal "generalized energy criterion" to predict mechanical failure in diverse materials. This new criterion offers physical insights into failure mechanisms like shear and cleavage, confirmed experimentally in metallic glass.

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Solid Mechanics

Background:

  • Predicting material mechanical failure is a long-standing challenge in materials science and mechanics.
  • Existing failure criteria are often material-specific, lacking universal applicability.
  • Galileo's early work on material failure criteria dates back three centuries.

Purpose of the Study:

  • To establish a generalized criterion for predicting the mechanical failure of diverse structural materials.
  • To introduce and validate a universal law for material failure prediction.
  • To provide new physical insights into the fundamental mechanisms of material failure.

Main Methods:

  • Development of a "generalized energy criterion" for material failure.
  • Experimental validation using a metallic glass specimen.
  • Analysis of the interplay between shear and cleavage failure mechanisms.

Main Results:

  • The generalized energy criterion demonstrates universal applicability across different material types.
  • Experimental results confirm the criterion's quantitative accuracy in predicting failure.
  • The criterion elucidates the competitive and interactive nature of shear and cleavage failure.

Conclusions:

  • The generalized energy criterion represents a significant advancement in understanding and predicting material failure.
  • This universal law offers a new physical basis for assessing the structural integrity of components.
  • The findings have broad implications for materials selection and engineering design.