Results 201 to 210 of about 61,202 (261)

Stability and Cold Drawing of Viscoelastic Bars

Journal of Rheology, 1981
A theory of stability for deformation of BKZ viscoelastic bars is developed. This theory is an extension of the one given by Ericksen for elastic bars. For appropriate strain potentials under certain loads in uniaxial creep and constant rate of extension, the bar will deform homogeneously for some time, and then become unstable and neck.
Bernstein, Barry, Zapas, Louis J.
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The cold drawing of high polymers

Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1954
Abstract Like many other polymers, amorphous polyethyleneterephthalate cold draws in the shoulders of a neck when stretched at room temperature. The draw ratio across the shoulders is not a constant for the polymer, but is found to depend on the temperature and speed of stretching, and on the initial specimen cross-section and ...
I. Marshall, A. B. Thompson
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Mechanics of controlled fragmentation by cold drawing

Journal of the Mechanics and Physics of Solids, 2022
Abstract Cold drawing is a mature and widely adopted technique in the shaping of metallic and polymeric materials in industry. Interestingly, cold drawing of a ductile cladding containing a brittle core wire or a ductile substrate supporting a deposited brittle film has recently emerged as a method to produce micron sized rods and ribbons through ...
Li, Dong, Wang, Zhixun, Chen, Ming, Wei, Lei, Gao, Huajian   +4 more
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Studies in Cold-Drawing: Part 1—Effect of Cold-Drawing on Steel

Journal of Fluids Engineering, 1955
Abstract In the study of cold-drawing SAE 1020 steel rod various amounts up to a true reduction in area of 0.76, several properties were obtained such as hardness, torsion, and tension. Residual stresses were measured and the microstructure was examined. The effect of the amount of reduction and the direction of drawing per pass (defined
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The cold drawing of polyethylene terephthalate

British Journal of Applied Physics, 1967
The cold-drawing behaviour of polyethylene terephthalate has been studied over a wide range of test conditions and polymer constitution. In addition to measurements at different temperatures and strain rates, the influence of pre-orientation, crystallinity and chemical cross-linking was investigated.
S W Allison, I M Ward
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On the cold-drawing of plastics

Journal of Applied Polymer Science, 1963
The 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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Polymer fibrillization during cold drawing

Polymer Science U.S.S.R., 1977
Abstract 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, G.M. Lukovkin, N.F. Bakeyev   +2 more
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Repeated Cold Drawing and Annealing of Polypropylene

Journal of Applied Physics, 1967
Samples of polypropylene were cold drawn to a maximum extension of five times their original length and then annealed, under no load, at 160°C. Eighty percent of the extension was recovered on annealing. Samples were then redrawn and annealed again repeating the procedure through five drawing cycles.
Richard G. Crystal, David Hansen
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On the “Cold Drawing” of Semicrystalline Polymers

Journal of Macromolecular Science, Part B, 2005
On 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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A constitutive model of cold drawing in polycarbonates

International Journal of Plasticity, 1999
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Masud, Arif, Chudnovsky, Alexander
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