Nonlinear mechanical response of high density polyethylene. Part II: Uniaxial constitutive modeling

1997 ◽  
Vol 37 (2) ◽  
pp. 414-420 ◽  
Author(s):  
Chuntao Zhang ◽  
Ian D. Moore
Keyword(s):  
Constitutive Modeling ◽  
High Density Polyethylene ◽  
Mechanical Response ◽  
High Density ◽  
Nonlinear Mechanical

Analytical interpretations of structural and mechanical response of high density polyethylene/hydroxyapatite bio-composites

2012 ◽  
Vol 36 ◽  
pp. 757-766 ◽  
Author(s):  
Harjeet S. Jaggi ◽  
Yogesh Kumar ◽  
Bhabani K. Satapathy ◽  
Alok R. Ray ◽  
Amar Patnaik
Keyword(s):  
High Density Polyethylene ◽  
Mechanical Response ◽  
High Density

Mechanical response of high density polyethylene to gamma radiation from a Cobalt-60 irradiator

2016 ◽  
Vol 52 ◽  
pp. 111-116 ◽  
Author(s):  
James Cassidy ◽  
Sepehr Nesaei ◽  
Robert McTaggart ◽  
Fereidoon Delfanian
Keyword(s):  
Gamma Radiation ◽  
High Density Polyethylene ◽  
Mechanical Response ◽  
High Density

Mechanical response of buried High-Density Polyethylene pipelines under normal fault motions

2015 ◽  
Vol 20 (6) ◽  
pp. 2253-2261 ◽  
Author(s):  
Seyed Abolhasan Naeini ◽  
Elham Mahmoudi ◽  
Mohammad Mahdi Shojaedin ◽  
Mohsen Misaghian
Keyword(s):  
High Density Polyethylene ◽  
Mechanical Response ◽  
Normal Fault ◽  
High Density

scholarly journals Sustainable Additive Manufacturing: Mechanical Response of High-Density Polyethylene over Multiple Recycling Processes

Recycling ◽  
2021 ◽  
Vol 6 (1) ◽  
pp. 4
Author(s):  
Nectarios Vidakis ◽  
Markos Petousis ◽  
Athena Maniadi
Keyword(s):  
Additive Manufacturing ◽  
Mechanical Behavior ◽  
High Density Polyethylene ◽  
Mechanical Response ◽  
Positive Impact ◽  
Research Work ◽  
High Density ◽  
Fused Filament Fabrication ◽  
Recycled Materials ◽  
Polymer Recycling

Polymer recycling is nowadays in high-demand due to an increase in polymers demand and production. Recycling of such materials is mostly a thermomechanical process that modifies their overall mechanical behavior. The present research work focuses on the recyclability of high-density polyethylene (HDPE), one of the most recycled materials globally, for use in additive manufacturing (AM). A thorough investigation was carried out to determine the effect of the continuous recycling on mechanical, structural, and thermal responses of HDPE polymer via a process that isolates the thermomechanical treatment from other parameters such as aging, contamination, etc. Fused filament fabrication (FFF) specimens were produced from virgin and recycled materials and were experimentally tested and evaluated in tension, flexion, impact, and micro-hardness. A thorough thermal and morphological analysis was also performed. The overall results of this study show that the mechanical properties of the recycled HDPE polymer were generally improved over the recycling repetitions for a certain number of recycling steps, making the HDPE recycling a viable option for circular use. Repetitions two to five had the optimum overall mechanical behavior, indicating a significant positive impact of the HDPE polymer recycling aside from the environmental one.

Composition and Surface Topography Effects on Apatite-Forming Ability of Ceramic-Polymer Composites

2003 ◽  
Vol 774 ◽  
Author(s):  
Susan M. Rea ◽  
Serena M. Best ◽  
William Bonfield
Keyword(s):  
Surface Topography ◽  
High Density Polyethylene ◽  
High Density ◽  
Apatite Layer ◽  
Biologically Active ◽  
Human Blood Plasma ◽  
Apatite Formation ◽  
Polyethylene Matrix ◽  
Composite Surface ◽  
X Ray

AbstractHAPEXTM (40 vol% hydroxyapatite in a high-density polyethylene matrix) and AWPEX (40 vol% apatite-wollastonite glass ceramic in a high density polyethylene matrix) are composites designed to provide bioactivity and to match the mechanical properties of human cortical bone. HAPEXTM has had clinical success in middle ear and orbital implants, and there is great potential for further orthopaedic applications of these materials. However, more detailed in vitro investigations must be performed to better understand the biological interactions of the composites and so the bioactivity of each material was assessed in this study. Specifically, the effects of controlled surface topography and ceramic filler composition on apatite layer formation in acellular simulated body fluid (SBF) with ion concentration similar to those of human blood plasma were examined. Samples were prepared as 1 cm × 1 cm × 1 mm tiles with polished, roughened, or parallel-grooved surface finishes, and were incubated in 20 ml of SBF at 36.5 °C for 1, 3, 7, or 14 days. The formation of a biologically active apatite layer on the composite surface after immersion was demonstrated by thin-film x-ray diffraction (TF-XRD), environmental scanning electron microscopy (ESEM) imaging and energy dispersive x-ray (EDX) analysis. Variations in sample weight and solution pH over the period of incubation were also recorded. Significant differences were found between the two materials tested, with greater bioactivity in AWPEX than HAPEXTM overall. Results also indicate that within each material the surface topography is highly important, with rougher samples correlated to earlier apatite formation.

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