Three-dimensional large-strain tensile deformation of neat and calcium carbonate-filled high-density polyethylene

Polymer ◽  
2005 ◽  
Vol 46 (7) ◽  
pp. 2257-2265 ◽  
Author(s):  
E.M. Parsons ◽  
M.C. Boyce ◽  
D.M. Parks ◽  
M. Weinberg
Keyword(s):  
Calcium Carbonate ◽  
High Density Polyethylene ◽  
Tensile Deformation ◽  
Large Strain ◽  
Three Dimensional ◽  
High Density

Quantification of Cavitation in Neat and Calcium Carbonate-Filled High-Density Polyethylene Subjected to Tension

2011 ◽  
Vol 133 (3) ◽  
Author(s):  
F. Addiego ◽  
J. Di Martino ◽  
D. Ruch ◽  
A. Dahoun ◽  
O. Godard ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
High Density Polyethylene ◽  
Shape Factor ◽  
Tensile Deformation ◽  
Quantitative Information ◽  
Semicrystalline Polymers ◽  
High Density ◽  
Deformation State ◽  
Microscopic Features ◽  
Void Shape

Cavitation-induced deformation mechanisms in neat semicrystalline polymers, i.e., crazing, and in the derived composites, i.e., particle-matrix debonding, are generally activated during the transition between viscoelastic and viscoplastic deformation stages. However, little quantitative information about the void evolution with the drawing level is to date available in the literature. The objective of this work is to quantify cavitation mechanisms in neat and calcium carbonate-filled high-density polyethylene (HDPE) subjected to tensile deformation. Attention was first focused on the properties of the materials that were assessed by means of a thermogravimetric analyzer, a differential scanning calorimeter, a scanning electron microscope (SEM), and a dynamic mechanical analyzer. In a second step, macroscopic aspects of cavitation were studied by quantifying volume variation of the materials subjected to tension using an accurate optical extensometer (VidéoTraction). Attention was then turned to microscopic features of cavitation through a careful quantification of void density and shape factor by means of a method coupling a SEM with an image analysis procedure. At the two scales of interest, the results demonstrate that (i) the void density generated by crazing in neat HDPE or particle-matrix debonding in the composites gradually increases with the deformation state, (ii) void density induced by debonding is higher than that generated by crazing, and (iii) decreasing particles size causes an increase of void density. We also estimated the void shape factor, that is, ratio between the height and the width of the cavities. In all the studied materials, this parameter starts from a value that is below 1 and increases by a factor of 2 with increasing deformation. Moreover, in the case of the composites, one notes a higher void shape factor compared with the neat material, and particle size does not influence this parameter. The results provided by this paper can be the basis of a physically based model predicting cavitation mechanisms in semicrystalline polymers.

Composites based on green high-density polyethylene, polylactide and nanosized calcium carbonate: Effect of the processing parameter and blend composition

2016 ◽  
Vol 181 ◽  
pp. 344-351 ◽  
Author(s):  
Amanda Gerhardt de Oliveira ◽  
Ana Lucia Nazareth da Silva ◽  
Ana Maria Furtado de Sousa ◽  
Márcia Christina Amorim Moreira Leite ◽  
Julio César Jandorno ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
High Density Polyethylene ◽  
High Density ◽  
Processing Parameter ◽  
Blend Composition

Two Lamellar to Fibrillar Transitions in the Tensile Deformation of High-Density Polyethylene

2010 ◽  
Vol 43 (10) ◽  
pp. 4727-4732 ◽  
Author(s):  
Zhiyong Jiang ◽  
Yujing Tang ◽  
Jens Rieger ◽  
Hans-Friedrich Enderle ◽  
Dieter Lilge ◽  
...  
Keyword(s):  
High Density Polyethylene ◽  
Tensile Deformation ◽  
High Density

scholarly journals Prediction of service half-life time of high density polyethylene/organo-modified calcium carbonate composite exposed naturally at Dong Hoi - Quang Binh

2018 ◽  
Vol 56 (6) ◽  
pp. 767-772 ◽  
Author(s):  
Le Duc Minh ◽  
Nguyen Thuy Chinh ◽  
Le Duc Giang ◽  
Tong Cam Le ◽  
Dau Thi Kim Quyen ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Half Life ◽  
High Density Polyethylene ◽  
Life Time ◽  
High Density

scholarly journals Influence of Backfill Compaction on Mechanical Characteristics of High-Density Polyethylene Double-Wall Corrugated Pipelines

2019 ◽  
Vol 2019 ◽  
pp. 1-24 ◽  
Author(s):  
Hongyuan Fang ◽  
Peiling Tan ◽  
Bin Li ◽  
Kangjian Yang ◽  
Yunhui Zhang
Keyword(s):  
Finite Element ◽  
High Density Polyethylene ◽  
Three Dimensional ◽  
Local Buckling ◽  
Element Model ◽  
High Density ◽  
Model Matching ◽  
Exterior Wall ◽  
Finite Element Software ◽  
Hdpe Pipe

For flexible pipelines, the influence of backfill compaction on the deformation of the pipe has always been the focus of researchers. Through the finite element software, a three-dimensional soil model matching the exterior wall corrugation of the high-density polyethylene pipe was skillfully established, and the “real” finite element model of pipe-soil interaction verified the accuracy through field test. Based on the model, the strain distribution at any position of the buried HDPE pipe can be obtained. Changing the location and extent of the loose backfill, the strain and radial displacement distributions of the interior and exterior walls of the HDPE pipe under different backfill conditions when external load applied to the foundation were analyzed, and the dangerous parts of the pipe where local buckling and fracture may occur were identified. It is pointed out that when the backfill is loose, near the interface between the backfill loose region and the well-compacted region, the maximum circumferential strain occurs frequently, the exterior wall strain is more likely to increase greatly on the region near crown or invert, the interior wall strains increase in amplitude at springline, and the location of the loose region has a greater influence on the strain of the pipe than the size of the loose area.

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