A new approach to describe the tensile stress-strain curve of a glassy polymer

1978 ◽  
Vol 13 (7) ◽  
pp. 1443-1448 ◽  
Author(s):  
J. -C. Bauwens
Keyword(s):  
Tensile Stress ◽  
Glassy Polymer ◽  
Strain Curve ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
New Approach

scholarly journals Predicting Specific Stress of Cotton Staple Ring Spun Yarns: Experimental and Theoretical Results

2017 ◽  
Vol 25 (0) ◽  
pp. 43-47 ◽  
Author(s):  
Muhammad Zubair ◽  
Bohuslav Neckář ◽  
Zilfiqar Malik
Keyword(s):  
Reasonable Agreement ◽  
Twist Angle ◽  
Strain Curve ◽  
Stress Strain Curve ◽  
Fiber Stress ◽  
Stress Strain ◽  
New Approach ◽  
Contraction Ratio ◽  
Spun Yarns ◽  
Theoretical Results

The aim of this research is to predict the yarn specific stress from fiber specific stress and fiber stress utilisation. In this paper a new approach is introduced to predict the specific stress-strain curves of cotton carded and combed yarns. The force on single fiberis worked out and these fiber forces are combined together to obtain forces acting on yarn. The theoretical model introduces the utilisation of fiber stress on the basis of the fiber specific stress-strain curve, twist angle, fiber directional distribution parameter C and contraction ratio. A comparison of experimental results suggests that the specific stress-strain curves predicted have reasonable agreement with the experimental yarn specific stress-strain curves for all types of yarns. Thus this model is valid to predict the specific stress-strain curves for carded and combed cotton ring spun yarns.

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