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Showing 1 to 13 of 13 for “"transverse cracks"”.
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Characteristics of thermally-induced transverse cracks in graphite-epoxy composite laminates
The characteristics of thermally-induced transverse cracks in T300/5208 graphite-epoxy cross-ply and quasi-isotropic laminates were investigated both experimentally and analytically. The formation of transverse cracks and the subsequent crack spacing present during cooldown to -250°F (116K) and …
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Experimental Mechanics of Crack Width in Full-Scale Sections of Continuously Reinforced Concrete Pavements
… reinforced concrete pavements have numerous transverse cracks that occur naturally at variable spacing. These cracks do not affect the performance of the structure unless they widen and result in a loss of load transfer efficiency. The capacity to transfer vertical loads across a crack …
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Finite element analysis of damaged cross-ply composite laminates
The problem of transverse cracks in T300/5208 graphite-epoxy cross-ply laminates was studied using generalized plane strain finite element analysis. The degradation of elastic modulus, Poisson's ratio, shear modulus, and coefficient of thermal expansion was predicted and then compared with …
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Y-cracking in continuously reinforced concrete pavements
When transverse cracks meander there is a high possibility for transverse cracks to meet at a point and connect to another transverse crack, creating a Y-crack. Y-cracks have been blamed for being the origin of punchouts and spallings in CRCPs. When the direction of maximum principal stress …
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Theory of ultrasonic diffraction by damage developed in thin laminated composites
… which would result if certain damage states (transverse cracks and delaminations) are introduced into a graphite/epoxy laminate through which the ultrasonic wave passes. and [0, ±45, 90]s) is presented which shows changes in the apparent attenuation of, about 1 dB. These changes generally …
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Analysis of Composite Laminates with Matrix Cracks
… redistribution due to the existence of matrix cracks. Both transverse cracks (2-D problem) and cross (transverse and longitudinal) cracks (3-D problem) are studied. Results for graphite/epoxy cross-ply laminates are presented and compared to those of other approaches. Some other materials, for …
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Multiphase particle-size-grouping model of precipitation and its application to thermal processing of microalloyed steel
… to beneficial grain refinement or detrimental transverse surface cracks. A comprehensive set of models has been developed to determine precipitate formation during metal processing. They include an equilibrium precipitation model and kinetic models for single-phase and multiphase precipitation, …
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Evaluation of surface roughness and bond-slip behavior of new textured epoxy-coated reinforcing bars
… which often results in the early development of transverse cracks in bridge decks. To solve this problem, the Illinois Department of Transportation (IDOT) proposed a new type of textured epoxy-coated (TEC) reinforcing bars with applied roughness to improve the bond between concrete and steel …
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Hot ductility of steels
… in the continuous casting process in which transverse cracks propagate. Two zones of reduced ductility can be identified. The Y-a transformation zone which has been shown to produce a significant ductility trough due to strain concentration in the softer ferrite films surrounding the V …
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Lamb wave propagation in laminated composite plates
… wave propagation speed. Damage in the form of transverse cracks in the 90° plies of a [90/90/90/0], graphite/epoxy laminate reduced the phase velocities of the Lamb modes. The lowest antisymmetric mode is sensitive to stiffness reduction in composite plates. Consequently, axial stiffness …
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Investigation of constraint effects on flaw growth in composite laminates
… Results were presented for the case of a transverse flaw in an interior ply perpendicular to the loading axis. Two orientations of the flawed ply were examined (0 and 90 degrees), and two distinctly different constraint situations were studied (cross-ply constraint and biaxial constraint). …
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Long-Term Modelling of Composite Pavement Performance
… predictions and actual field measurements of transverse cracks on the relevant pavement sections. The selected pavement sections belong to two climatic regions: wet/freeze zone, wet/non-freeze. Predictions for certain states show matching results approximately to the actual development of …
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Thermo-mechanical behavior of steel in the continuous casting process from meniscus to caster exit
… at the strand surface, increasing the risk of transverse crack formation. Reduction in the severity of the surface temperature fluctuations should reduce the severity of the cyclic mechanical loading, and decrease the risk of transverse crack formation.