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Showing 1 to 16 of 16 for “"Ductile metals"”.
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Steady crack growth through ductile metals: Computational studies
… the crack-front response during sustained ductile tearing in structural metals at quasi-static rates using high resolution finite element computations. At load levels approaching the steady-growth regime, well-established computational methods that model material damage break down …
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The erosion of ductile metals by solid particle impact
… This dissertation describes experiments in which ductile metal surfaces were eroded with abrasive particles (size range 40 - 600nm) under controlled conditions. Damage to the surface was characterised by weight loss measurements, and also by microscopical examination. Surface and subsurface damage …
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A microtexture based analysis of surface roughening in ductile metals during tensile deformation
… ridges during the deformation of two specific ductile metal alloys, namely AISI 430 ferritic stainless steel and an aluminium alloy designated AA3002. The investigation considers, in particular, the development of parallel ridges during uniaxial tension, and their effect on the overall surface …
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A microtexture based analysis of surface roughening in ductile metals during tensile deformation
… ridges during the deformation of two specific ductile metal alloys, namely AISI 430 ferritic stainless steel and an aluminium alloy designated AA3002. The investigation considers, in particular, the development of parallel ridges during uniaxial tension, and their effect on the overall surface …
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Three-dimensional, inelastic response of single-edge notch bend specimens subjected to impact loading
… significant problems in fracture mechanics of ductile metals involve surface breaking defects (cracks) located in structures that are subjected to short-duration loading caused by impact or blast. When the severity of impact loads is sufficient to produce large inelastic deformations, the …
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Investigation of Machinability and Dust Emissions in Edge Trimming of Laminated Carbon Fiber Composites
… wet or dry. CFRP does not machine similar to ductile metals as the chip formation mechanism consists mostly of a series of brittle factures by shearing of the fibers and matrix where ductile metals produce a uniform chip through plastic deformation. In dry machining, CFRP produces powder like …
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Failure Criteria and Cumulative Damage in Fatigue Under Multi-Axial Stress Conditions
… equation for predicting the fatigue failure of ductile metals under multiaxial stress is proposed based on the maximum range of shear stress modified for the effects of the normal stress acting on the maximum shear stress plane and of anisotropy. ý' This equation is shown to give excellent …
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Development of a portable scratch test device for probing strength, ductility and structural distress in metal materials
… for determining the strength and ductility of metals without the use of destructive methods involving the extraction of tensile testing specimens. Although the scientific basis for scratch testing is well established, there is a necessity for a simple and robust implementation that avoids the …
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Effect of a Graded Layer on the Plastic Dissipation During Mixed-Mode Fatigue Crack Growth on Ductile Bimaterial Interfaces
… predicting mode I fatigue crack growth rates in ductile metals based on the total plastic dissipation ahead of a crack tip was proposed in 2003. Since then, this theory has been extended to layered material systems that typically include mixed-mode loading and elastic/plastic mismatch. Previous …
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The chip-tool interface in metal cutting
… (sapphire) cutting tool to machine various ductile metals, such as lead and aluminium, in air and in vacuum. On the basis of these observations a new classification is made of the zones of contact at the interface in continuous cutting. This description is extended to steel tools and harder …
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Fragmentation and reaction of structural energetic materials
… found to be smaller than those from homogeneous ductile metals at comparable strain rates, posing a reduced risk to innocent bystanders if used in munitions. Extensive interface failure was observed which suggested that the interface density of these systems was an important parameter in their …
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Dislocations and Green's functions in prestressed solids
… materials, but with a special emphasis on ductile metals (J2-deformation theory of plasticity), it is shown that strongly localized strain patterns emerge, when a dislocation dipole is emitted by a source and the prestress level is high enough. These strain patterns may explain cascade …
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Experimental and Numerical Study of Ductile Metal Auxetic Tubular Structures
… auxetic behavior in tubes constructed using ductile metals commonly found in structural applications i.e. steel and aluminum. The main objective was to establish whether performance enhancements could be obtained through auxetic behavior in ductile metal tubes. In addition, any potential …
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Strength and Ductility of Concrete Cylinders Confined with Fiber Metal Laminate Composites
… FRP rehabilitation systems with the ability of ductile metals to yield under relatively large strains to provide energy dissipation and ensure ductile behavior. Known as a fiber metal laminate (FML), the aerospace industry has successfully developed a composite consisting of thin metal sheets …
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The steady-state work density gradient: A new parameter and strategies for characterizing crack propagation in thin ductile sheets
… the crack growth resistance of thin ductile sheets: the steady-state work density gradient. The steady-state work density gradient describes the stress necessary to drive crack propagation in the late stages of mode I crack growth as the crack tip approaches a specimen edge and crack …