Fundamental Fracture Mechanics Equation of Material
Leonid S. Kremnev
TL;DR
This paper derives a new fracture mechanics equation based on energy conservation for elastic-plastic materials, enabling improved strength analysis of real-structure materials without relying on traditional Linear Fracture Mechanics.
Contribution
It introduces a novel fracture mechanics equation derived without LFM postulates, linking force and energy criteria in Non-linear Fracture Mechanics for real-structure materials.
Findings
Established $K_{lc}$ dependence on material properties
Experimentally confirmed the relationship for steels
Provided a basis for modern strength analysis
Abstract
On the basis of energy conservation law an without utilizing Linear Fracture Mechanics (LFM) postulates the equation of a real-structure material elastic-plastic fracture has been derived. With the help of this equation the force and energy criteria of Non-linear Fracture Mechanics (NLFM) have been found. These criteria constitute the basis of modern strength analysis of machineparts and structures made of real-structure materials. dependence on ultimate strength limit, yield limit and impact toughness has been established and experimentally confirmed for a number of steels
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Taxonomy
TopicsMaterial Properties and Failure Mechanisms · Engineering Diagnostics and Reliability · High-Velocity Impact and Material Behavior