Open AccessBook
Fracture Mechanics: Fundamentals and Applications
Surjya Kumar Maiti
- 01 Jan 1978
1.2K
TL;DR: In this paper, a detailed discussion of fundamental concepts including linear elastic fracture mechanics (LEFM), yielding fracture mechanics, mixed mode fracture, and computational aspects of LEM are discussed.
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Abstract: Fracture mechanics studies the development and spreading of cracks in materials. The study uses two techniques including analytical and experimental solid mechanics. The former is used to determine the driving force on a crack and the latter is used to measure material's resistance to fracture. The text begins with a detailed discussion of fundamental concepts including linear elastic fracture mechanics (LEFM), yielding fracture mechanics, mixed mode fracture and computational aspects of linear elastic fracture mechanics. It explains important topics including Griffith theory of brittle crack propagation and its Irwin and Orowan modification, calculation of theoretical cohesive strength of materials through an atomic model and analytical determination of crack tip stress field. This book covers MATLAB programs for calculating fatigue life under variable amplitude cyclic loading. The experimental measurements of fracture toughness parameters KIC, JIC and crack opening displacement (COD) are provided in the last chapter.
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Citations
Characterisation of the crack tip plastic zone in fatigue via synchrotron X‐ray diffraction
A.S. Cruces,Paulina Bednarczyk +1 more
TL;DR: In this paper , a new methodology is described for characterising the plastic zone ahead of a fatigue crack using a set of experimental data obtained by synchrotron X-ray diffraction on a bainitic steel compact tension specimen.
Determination of the fracture toughness characteristics of s355jr steel
TL;DR: In this article, the critical value of fracture toughness was determined at the moment of crack initiation by measuring of the stretch zone width, and in the moment reaching a subcritical crack growth of 0.2 mm.
Microstructure and mechanical properties of ASTM A131 EH36 steel fabricated by laser aided additive manufacturing
Jingjing Wang,Youxiang Chew,Wenjin Wu,Wei Jing,Xipeng Tan,Erjia Liu,Guijun Bi,Shu Beng Tor,Sharine Ying Jia Tan,Yuan Hao Lee,Aziz Merchant,Fei Weng,Yang Liu +12 more
TL;DR: In this paper, a direct laser deposition (DLD) process was used to print ASTM A131 EH36 high strength low alloy steel samples in four different orientations, namely, horizontal 0° (XY_0°), vertical 90° (XZ_90°) and 45° (Z_45°), with an EH 36 steel powder, and the microstructures, mechanical properties and fracture behavior of the printed materials, were evaluated in detail.
5
A novel fractal-statistical scaling model of rocks considering strain rate
TL;DR: In this paper , an fractal-statistical scaling model incorporating strain rate is proposed based on a weakest-link approach, fractal theory and dynamic fracture mechanics, which can capture the scaling behaviors of rocks under dynamic loading conditions.
5
Model of fracture for the Zry cladding of nuclear fuel rods included in the code DIONISIO 1.0
Alejandro Soba,Alicia Denis +1 more
TL;DR: The DIONISIO code describes most of the main phenomena occurring in a fuel rod during normal operation of a nuclear power reactor, starting from the irradiation history, the code predicts the temperature distribution, elastic and plastic stress and strain, creep, swelling and densification, release of fission gases, caesium and iodine to the internal rod volume, gas mixing, pressure increase, irradiation growth of the cladding, development of an oxide layer on its surface and hydrogen uptake, restructuring and grain growth in the pellet as mentioned in this paper.
5
References
The Phenomena of Rupture and Flow in Solids
TL;DR: In this article, the authors investigated the effect of surface scratches on the mechanical strength of solids, and some general conclusions were reached which appear to have a direct bearing on the problem of rupture, from an engineering standpoint, and also on the larger question of the nature of intermolecular cohesion.
A Path Independent Integral and the Approximate Analysis of Strain Concentration by Notches and Cracks
TL;DR: In this paper, an integral is exhibited which has the same value for all paths surrounding a class of notches in two-dimensional deformation fields of linear or non-linear elastic materials.
8.2K
Yielding of steel sheets containing slits
TL;DR: In this article, a relation between extent of plastic yielding and external load applied was investigated, and panels containing internal and edge slits were loaded in tension and lengths of plastic zones were measured.
7.6K
•Book
The stress analysis of cracks handbook
Hiroshi Tada,Paul C. Paris,George R. Irwin +2 more
- 01 Jan 2000
TL;DR: The Stress Analysis of Cracks Handbook as mentioned in this paper provides a comprehensive, easy-to-access collection of elastic stress solutions for crack configurations, along with other relevant information, such as displacements, crack opening areas, basic stress functions source references, accuracy of solutions, and more.
A Critical Analysis of Crack Propagation Laws
Paul C. Paris,Fazil Erdogan +1 more
TL;DR: A critical analysis questions the validation of crack-propagation laws using limited data, suggesting that agreement with a wide range of data from multiple specimens and varying crack-extension rates is necessary for validation, proposing a new empirical law for this purpose.
6.7K