The plastic constraint factor and mechanical properties of a high-density polyethylene on impact loading

1995 ◽  
Vol 30 (5) ◽  
pp. 506-509 ◽  
Author(s):  
G. V. Kozlov ◽  
V. D. Serdyuk ◽  
V. A. Beloshenko
Keyword(s):  
Mechanical Properties ◽  
Impact Loading ◽  
High Density Polyethylene ◽  
High Density ◽  
Constraint Factor ◽  
Plastic Constraint

Effect of flow forming on mechanical properties of high density polyethylene pipes

2015 ◽  
Vol 19 ◽  
pp. 155-162 ◽  
Author(s):  
Amin Abedini ◽  
Payam Rahimlou ◽  
Taghi Asiabi ◽  
Samrand Rash Ahmadi ◽  
Taher Azdast
Keyword(s):  
Mechanical Properties ◽  
High Density Polyethylene ◽  
High Density ◽  
Flow Forming ◽  
Polyethylene Pipes

Tuning the Mechanical Properties of High-Density Polyethylene by ECAE Process

2015 ◽  
Author(s):  
Catalin Fetecau ◽  
Felicia Stan ◽  
Laurentiu Sandu ◽  
Florin Susac
Keyword(s):  
Mechanical Properties ◽  
High Density Polyethylene ◽  
Equal Channel Angular Extrusion ◽  
Morphological Changes ◽  
Longitudinal Axis ◽  
High Density ◽  
Scanning Calorimetry ◽  
Plastic Deformations ◽  
The Third ◽  
Indentation Tests

This paper investigates the ability of the equal channel angular extrusion (ECAE) process to induce morphological changes and hence tune the mechanical properties of high-density polyethylene (HDPE). In this study, differential scanning calorimetry (DSC), compression and cylindrical macro-indentation tests have been used to investigate the evolution of the mechanical properties of HDPE processed by ECAE up to four passes via route BC, i.e. counter clockwise 90° billet rotation about its longitudinal axis. It was found that the ECAE process induces significant plastic deformations with changes in the crystalline structure. The ECAE process increased the HDPE crystallinity by 10 to 15%. The number of ECAE passes has a significant effect on the magnitude of the mechanical properties especially on the elastic modulus and yield stress. Young’s modulus and yield strength decreased with increasing the number of ECAE passes and reached a stationary state after the third pass.

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