INFLUENCE OF SPECIMEN ORIENTATION ON THE PLASTIC INSTABILITY AND NECKING OF EXTRUDED HDPE SHEET

Authors

  • Rida B. ARIEBY Department of Mechanical and Industrial Engineering
  • Osama A. Terfas Department of Mechanical and Industrial Engineering

Keywords:

KEYWORDS: High Density Polyethylene; Tensile Necking; Plastic Instability Criterion; Orientation Dependency; Mechanical Behavior.

Abstract

ABSTRACT

In this work, the initiation and stabilization of the Plastic Instability of High-Density Polyethylene have been experimentally investigated and analyzed. Tensile tests using several complex loading paths involving large deformation have been carried out in order to determine the effect of different constant strain rates and various specimen orientations of extruded HDPE sheet on the elasto-viscoplastic behavior during necking. This work also examines the evolution of Poisson's ratio and Modulus of elasticity of semicrystalline polymers due to phenomenon of damage during instability stage. Based on the Considère criterion, a modified instability criterion is proposed taking into account the significant effect of volume variation due to damage under large deformation. The ability of the modified criterion to predict 1st and 2nd Considère strain of this polymer is examined. A good agreement between the modified criterion and the available experimental data is attained. This criterion is also discussed in relation to the orientation behavior and strain rate.https://jer.ly/PDF/Vol-33-2022/JER-02-33-Abstract.php?f=a

Author Biographies

Rida B. ARIEBY, Department of Mechanical and Industrial Engineering

Rida AREIBY is one of the staff members at the department of 3 faculty of 2. He is working as a since 2013-09-18. He teaches several subjects in his major and has several puplications in the field of his interest.

Osama A. Terfas, Department of Mechanical and Industrial Engineering

Osama Terfas is one of the academic staff members at the Department of Mechanical and Industrial Engineering. He is currently working as a Professor since 2022-06-18. He teaches several subjects in his major and has several publications in the field of his interest. He participates in many scientific committees such as quality, strategic planning, and curriculum programs. He is a member of several local and international conferences.

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Published

2024-07-17

How to Cite

ARIEBY, R. ., & Terfas, O. . (2024). INFLUENCE OF SPECIMEN ORIENTATION ON THE PLASTIC INSTABILITY AND NECKING OF EXTRUDED HDPE SHEET . Journal of Engineering Research, 17(33), 18. Retrieved from http://uot.edu.ly/journals/index.php/jer/article/view/1167

Issue

Vol. 17 No. 33 (2022): العدد 33 مارس 2022

Section

Articles

License

Copyright (c) 2024 Journal of Engineering Research
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