Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"deep drawing"”.
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Mechanisms of coating failures during deep drawing of coated sheet steels
Includes bibliographical references.
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A yield function to simulate earing in the deep drawing of aluminium
Deep drawing of metal sheeting is a commercially significant manufacturing process and as with all metal forming processes is subject to geometric defects. One defect of particular concern, termed earing, is characterised by an uneven edge to the drawn article. This work covers the implementation …
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The numerical modelling of transformation induced plasticity in the deep drawing of stainless steel
… which was used in the numerical simulation of deep drawing problems. The purpose of the material model was to predict the formation of martensite during the plastic straining of metastable austenitic stainless steel and the effect of the martensite formation on the plasticity of the steel. The …
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Application of stiffness geometries in the lightweight design and optimization of automotive monolithic deep-drawn hard-shell rooftops
… of an automotive monolithic (one piece) deep-drawn hard-shell rooftop. A monolithic design framework was developed to integrate geometric design, material selection, parametric optimization, numerical simulation and manufacturing feasibility within a unified approach. The monolithic …
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Numerical simulation of recrystallization behaviour of A1-1Mg during multi-pass rolling
… of subsequent forming processes, such as deep-drawing and sheet-metal forming. It is becoming increasingly important to control these microstructural changes in order to optimise the subsequent processing route and thereby produce a cost-effective product. The ability to model the …
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An analysis of frictional effects in non-stationary contact problems for metal forming simulations
… problems which arise in processes such as deep-drawing, punching, extrusion and rolling. All these processes involve friction between the contact surfaces: the sheet-metal workpiece and the toolpieces. The model of friction is thus an important part of any simulation of metal forming …
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Friction models in the solution of nonstationary contact problems
… cold rolling of a strip, and axisymmetric cup deep-drawing. The results are presented in the form of contour plots of the second invariant of stress (Mises), and the plastic yield and maximum stress. Also graphs for the thickness strain are given. These results are presented for each …
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Magnetic Barkhausen Noise Testing: Steel Grades and Stress Response
… electric motor laminates, submarine hull steel, deep-drawing steel and low to high plain carbon steels. Barkhausen noise signal parameters were correlated with core loss, grain size, crystallographic texture, hysteresis characteristics and the amount of carbon content. The significant …
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The relationship between texture and formability in sheet metals
… in the areas of texture, yield loci, deep drawing, earing and stretching behaviour of sheet metals.
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Beak design in folding-shearing
[Restricted]
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Multiscale modelling of woven and knitted fabric membranes
… properties include stretch forming and deep drawing formability that exhibits excellent stretchability and drapeability properties of textiles and textile composites. Since the inception of computerised numerical control for three-dimensional textile-manufacturing machines, technical …
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The influence of copper addition on the corrosion behaviour of low nickel austenitic stainless steels
… copper is said to prevent delayed cracking after deep drawing. The experimental alloys contain nominal amounts of 17Cr-5.4Ni-0.25N (wt%) with copper additions ranging from 0 to 3.3 wt%. Characterisation of the corrosion performance of these alloys involved testing in the solution treated, solution …
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A study of the forming limits of cold and hot forming of aluminium alloy sheets with multi-point tooling
… studies combined with the two test cases, deep drawing and stretch forming with multi-point tooling, suggest a feasible alternative route for the forming of lightweight high-strength sheet-metals. The pilot line established shows that the fast contact-cooling technology is effective for …
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Craftsmanship and automation in flexible metal spinning
… more established techniques such as stamping and deep drawing in the prototyping, initial development and small-volume production of steel and aluminium parts. However, despite advances in computer power, flexible spinning has not been automated yet. The design of toolpaths by trial and error …
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The study of intermetallic particles in aluminium alloy AA3104 can-body stock during homogenisation
… formability of the material during beverage can deep drawing and wall ironing. These parameters are earing, tear-off and galling resistance. During homogenisation of AA3104 direct chill (DC) ingot, there is a phase transformation from β-Al₆(Fe,Mn) orthorhombic phase to the harder α-Alₓ(Fe,Mn)₃Si₂ …
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Systemunterstützte Umformung
Konsequent betriebener Leichtbau führte und führt weiterhin zu steigender Komplexität in der Blechumformung. Erkenntnisse aus Forschungsaktivitäten zur gezielten Beeinflussung, Regelung und Vollautomatisierung des Tiefziehprozesses konnten jedoch bisher nicht in Großserienpresswerke transferiert …