scholarly journals Tearing and Delaminating of a Polymer Laminate

2011 ◽  
Vol 465 ◽  
pp. 169-174 ◽  
Author(s):  
Sharon Kao-Walter ◽  
M. Walter ◽  
A. Dasari ◽  
A. Leon
Keyword(s):  
Crack Propagation ◽  
Fracture Behaviour ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Element Calculation ◽  
Essential Work Of Fracture ◽  
Plastic Zones ◽  
Materials Used ◽  
Laminated Materials ◽  
Work Of Fracture

The fracture behaviour of laminated materials was studied in this work. The materials used in this work were low-density polyethylene (LDPE) laminated on polyethylene (PET). The thickness of the LDPE was 27 µm and the PET was 100 µm. Experiments were performed by using a 2-leg trousers specimen to analyse the tearing behaviour of the laminate in relation to the delamination. A clear delamination zone was observed during the crack propagation by tearing. Furthermore, a finite element calculation was performed to simulate the behavior around the crack tip during the tearing. A correlation between adhesion and crack propagation was discussed. Finally, the theory of Essential Work of Fracture (EWF) was used for predicting the specific total work of fracture along the tear path across the plastic zones.

Essential work of fracture of glass bead filled low density polyethylene

2005 ◽  
Vol 40 (19) ◽  
pp. 5323-5326 ◽  
Author(s):  
Wei Yang ◽  
Bang-Hu Xie ◽  
Wei Shi ◽  
Min Zuo ◽  
Zhong-Ming Li ◽  
...  
Keyword(s):  
Glass Bead ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Essential Work ◽  
Essential Work Of Fracture ◽  
Work Of Fracture

Impact-Specific Essential Fracture Work of Banana Fiber Reinforced Low-Density Polyethylene Composites

2019 ◽  
Vol 961 ◽  
pp. 16-22
Author(s):  
Purnomo ◽  
Putu Hadi Setyarini ◽  
Dwi Sulistyaningsih
Keyword(s):  
Fracture Toughness ◽  
Work Stress ◽  
Atmospheric Pressure ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Powder Form ◽  
Banana Fiber ◽  
Essential Work Of Fracture ◽  
Work Of Fracture ◽  
Fracture Work

The aim of this study is to investigate the behavior of banana fiber (BF)-low-density polyethylene (LDPE) composite fracture toughness. The LDPE pellets are transformed into powder form which is then functioned as a matrix reinforced with banana fiber (BF). The composites were formed by injection molding techniques which are followed by atmospheric-pressure annealing at 90°C for 24 hours. The composite fracture toughness behavior was evaluated using the essential work of fracture (EWF) approach. The results show that fracture toughness which is characterized by essential fracture work (we) value increases by the presence of BF up to 5 wt.%. However, the we value starts to decrease in the composite with BF content of 6 wt.%. There is a mismatch about the phenomenon of non-essential fracture work. Stress-whitened zones can be seen and observed but non-essential fracture work based on curves is a negative value.

Effect of water content on the fracture behaviour of hydroxypropyl cellulose films studied by the essential work of fracture method

2007 ◽  
Vol 39 (5) ◽  
pp. 500-512 ◽  
Author(s):  
Iryna Yakimets ◽  
Nikolaus Wellner ◽  
Andrew C. Smith ◽  
Reginald H. Wilson ◽  
Imad Farhat ◽  
...  
Keyword(s):  
Water Content ◽  
Fracture Behaviour ◽  
Hydroxypropyl Cellulose ◽  
Essential Work ◽  
Essential Work Of Fracture ◽  
Cellulose Films ◽  
Effect Of Water ◽  
Work Of Fracture

Fracture Behaviour of Flexible Polyethylene Foams for Potential Use in Damping Applications

2011 ◽  
Vol 99-100 ◽  
pp. 106-111
Author(s):  
Jose Ignacio Velasco ◽  
Marcelo Antunes ◽  
David Arencón ◽  
Antonio Martínez
Keyword(s):  
Fracture Behavior ◽  
Fracture Behaviour ◽  
Initial Crack ◽  
Material Microstructure ◽  
Essential Work Of Fracture ◽  
Testing Method ◽  
Closed Cell ◽  
Work Of Fracture ◽  
Potential Use

The application of the essential work of fracture (EWF) methodology for the fracture behavior characterization of closed-cell low density polyethylene flexible foams is discussed in the present paper. The thickness of the foamed sheet and the relative orientation of the initial crack were the main parameters studied. The interpretation of the results is carried out on the basis of the material microstructure and the applicability of the testing method.

Composites with high work of fracture

1980 ◽  
Vol 294 (1411) ◽  
pp. 545-550 ◽  
Keyword(s):  
Composite Materials ◽  
Fracture Behaviour ◽  
Low Density ◽  
Carbon Fibres ◽  
Ductile Metals ◽  
Cylindrical Tubes ◽  
Energy Absorbing ◽  
Work Of Fracture ◽  
High Work ◽  
Made In

Results obtained when investigating the fracture behaviour of wood have suggested the possibility of making composite materials with high work of fracture and low density, at the expense of moderate loss of stiffness. The reinforcing elements of the composite are made in the form of cylindrical tubes with helically wound walls of glass or carbon fibres, simulating, to a certain extent, the structure of wood cells. The hollow tubes, under tensile stress and in certain circumstances, are capable of deforming pseudo-plastically absorbing large amounts of energy in a manner which is effectively similar to that of ductile fibres Work of fracture in excess of 4 x 10 5 J/m 2 has been obtained, comparable to that of ductile metals. The dependence of the work of fracture on various parameters will be discussed together with some suggestions for compensating for the loss of stiffness without reducing the energy absorbing capacity of the system.

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