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Effect of Structural Geometry and Crack Location on Crack Driving Forces for Cracks in Welds
Transactions of the Korean Society of Mechanical Engineers A, 2006Defect assessment of a weld zone is important in fitness-for-service evaluation of plant components. Typically a J and estimation method for a defective homogeneous component is extended to a mismatched component, by incorporating the effect due to the strength mismatch between the weld metal and the base material.
Chang-Kyun Oh +3 more
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Decalcification of cracked cement structures
Computational Geosciences, 2015The benchmark problem presented in this paper deals with the leaching of calcium from hardened cement paste. The leaching of calcium results in the dissolution of the cement minerals which affects physical, chemical and mechanical properties of porous cement matrix.
Perko, Janez +7 more
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Influence of internal cracks on bond in cracked concrete structures
Archives of Civil and Mechanical Engineering, 2008The bond between concrete and steel bars is of fundamental importance to deformation characteristics of cracked concrete structures. It has been extensively studied for many years, particularly from the early 1970s. But the results of the studies seem to be inadequate for concrete structure analysis.
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Perturbation Eigensolutions of Elastic Structures With Cracks
Journal of Applied Mechanics, 1993The purpose of this paper is to determine approximate eigensolutions of a class of cracked mechanical systems governed by the two-dimensional Helmholtz equation through a perturbation approach. Shen (1993) shows that exact eigenvalues λm2, and their corresponding crack-opening shapes ΔΨm of such mechanical systems satisfy a Fredholm integral equation A(
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Fine structure of crack in ceramics
Proceedings, annual meeting, Electron Microscopy Society of America, 1984Many kinds of ceramics have been developed providing enough insulation, heat conduction or shock resistance. For the characteristics of strong toughness of the ceramics, movements of cracks by applying a force are noteworthy, because most ceramics are hardly distorted.In the present works, behavior of cracks in ceramics is observed with high resolution
Hiroshi Kakibayashi, Fumio Nagata
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Diagonal Cracking and Diagonal Crack Control in Structural Concrete
SP-204: Design and Construction Practices to Mitigate Cracking, 2001A number of fundamental concepts relevant to all types of cracking are examined. A tension stiffening relationship derived from first principles indicates that traditional empirical relationships include significant residual tension stresses from uncracked concrete.
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Dynamic Sensitivity of Structures to Cracks
Journal of Vibration and Acoustics, 1989Cracks that develop on machine members and structures influence their dynamic behavior. The Rayleigh principle is used for an estimation of the change in the natural frequencies and modes of vibation of the structure if the crack geometry is known, assuming that the eigenvalue problem for the uncracked structure has been solved in advance.
T. G. Chondros, A. D. Dimarogonas
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Crack Detection in Frame Structures
Inverse Problems in Mechanics, 1994Abstract An iterative method to determine the location and size of a crack using dynamic response measurements from a frame structure is presented. The solution procedure combines frequency-domain problem solving methods (deconvolution and the spectral element method) with a stochastic iterative search technique based on a genetic ...
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