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Production of duplex tubes by cold drawing
Metals Technology, 1978AbstractAn analytical solution based on the upper-bound technique is derivedfor coldplug drawmg of duplex tubes. A kinematically admissible axisymmetric velocity field is proposed which takes into account the strength and volume ratio of the component materials, redundant work, friction, and strain hardening. This analysis is considered to be the first
M. N. Islam, A. N. Bramley
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On the cold-drawing of plastics
Journal of Applied Polymer Science, 1963The characteristics of the cold-drawing of Lexan polycarbonate are compared with the several proposed mechanisms of cold-drawing. It is concluded that the mechanism of Lazurkin and Fogel'son, involving biased segmental motion, is correct. It is indicated that this mechanism easily explains the neck formation, and it is suggested how the glass ...
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A constitutive model of cold drawing in polycarbonates
International Journal of Plasticity, 1999zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Masud, Arif, Chudnovsky, Alexander
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On the “Cold Drawing” of Semicrystalline Polymers
Journal of Macromolecular Science, Part B, 2005On the basis of the literature and the author's data, the specific features of stress‐strain curves during uniaxial stretching of semicrystalline polymers were analyzed. It was shown that the general external appearance of a deformed sample (presence or lack of neck) and character of stress‐strain curves depend not only on strain temperature, T2, but ...
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The cold-drawing of high density polyethylene
Journal of Materials Science, 1970The cold-drawing of high density polyethylene has been studied over a wide range of temperatures and strain rates for a series of samples of very different molecular weight distribution. A natural draw-ratio was observed which was almost independent of temperature and strain rate, but was sensitive to the weight average molecular weight.
J. M. Andrews, I. M. Ward
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2019
Precision cold-drawn tubes are produced by cold drawing and cold pilgering. The cold drawing of the tubes is carried out at the so called draw bench, where the diameter of the tube from a larger diameter to the smaller is drawn through the die of certain dimensions.
Tarandek, Patrik +4 more
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Precision cold-drawn tubes are produced by cold drawing and cold pilgering. The cold drawing of the tubes is carried out at the so called draw bench, where the diameter of the tube from a larger diameter to the smaller is drawn through the die of certain dimensions.
Tarandek, Patrik +4 more
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Journal of the Textile Institute Proceedings, 1958
An investigation has been made into the variation in shape of the loadelongation curve of undrawn polyhexamethylene adipamide (nylon 6.6) filaments with change in ambient conditions, isotropic refractive index of the undrawn filament and speed of extension at low speeds of extension (0.008cm/sec–0.43cm/sec). The interaction of these variables and their
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An investigation has been made into the variation in shape of the loadelongation curve of undrawn polyhexamethylene adipamide (nylon 6.6) filaments with change in ambient conditions, isotropic refractive index of the undrawn filament and speed of extension at low speeds of extension (0.008cm/sec–0.43cm/sec). The interaction of these variables and their
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The cold drawing of amorphous polyethylene terephthalate
Journal of Materials Science, 1975The cold drawing of amorphous polyethylene terephthalate has been studied at constant strain rate over a wide range of temperatures for samples of different molecular weight and different initial molecular orientation (pre-orientation). The natural draw ratio was found to be dependent on pre-orientation, confirming previous studies, and for low degrees
J. S. Foot, I. M. Ward
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Polymer fibrillization during cold drawing
Polymer Science U.S.S.R., 1977Abstract A model for the cold drawing of a polymer is described as a non-uniform deformation which takes place in the presence of concentrations of stresses. An excess of free volume is assumed in the stress concentrator and also a local orientation of the macromolecular chains.
A.L. Volynskii +2 more
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Numerical Analysis of Cold Drawing of Tubes
1988Up to now, empirical design of tubes multi-pass drawing schemes remains frequent. So, to improve the design, a new three steps strategy is developed: step one testing and grading the involved schemes set with kinematic and static element approaches; step two testing the selected scheme with analogical experiments; step three testing again the selected ...
J. M. Rigaut +4 more
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