Effects of processing conditions and aging on the fracture toughness of rigid PVC pipe materials

1982 ◽  
Vol 4 (3) ◽  
pp. 95-100 ◽  
Author(s):  
J. F. Mandell ◽  
A. Y. Darwish ◽  
F. J. McGarry
Keyword(s):  
Fracture Toughness ◽  
Processing Conditions ◽  
Pvc Pipe ◽  
Rigid Pvc ◽  
Pipe Materials

Influence of Crack Orientation and Crosshead Speed on the Fracture Toughness of PVC Pipe Materials

2004 ◽  
Author(s):  
T. M. El-Bagory ◽  
M. S. El-Fadaly ◽  
M. Y. A. Younan ◽  
L. A. Abdel-Latif
Keyword(s):  
Fracture Toughness ◽  
Experimental Work ◽  
Engineering Application ◽  
Compact Tension ◽  
Specimen Thickness ◽  
Crosshead Speed ◽  
Operation Conditions ◽  
Pvc Pipe ◽  
Materials Used ◽  
Pipe Materials

In many modern engineering application designers and manufactures of Polyvinyl chloride (PVC) pipes are interested in the evaluation of fracture toughness under several operation conditions. The aim of the present work is to investigate the fracture toughness of commercial amorphous thermoplastic PVC materials used in pipes applications. The experimental work is carried out using three different specimens types: Taper Double Cantilever Beam (TDCB), Three Point Bend (TPB), and Compact Tension (CT). Tests are conducted on specimens with thickness (17,20,22, and 26 mm), longitudinal and transverse extrusion orientations, at different crosshead speeds (50–500 mm/min) to calculate the fracture toughness of PVC pipe materials. The experimental work has revealed that the crosshead speed has a significant effect on the fracture toughness at low speed rates. This effect, however, becomes insignificant at high rates since, the fracture behavior becomes brittle. The stress intensity factor KQ is approximately the same in both longitudinal and transverse orientations. The fracture toughness decreases as the specimen thickness increases.

Influence of Crack Orientation and Crosshead Speed on the Fracture Toughness of PVC Pipe Materials

2004 ◽  
Vol 126 (4) ◽  
pp. 489-496 ◽  
Author(s):  
Tarek M. El-Bagory ◽  
Mohamed S. El-Fadaly ◽  
Maher Y. A. Younan ◽  
Lotfi A. Abdel-Latif
Keyword(s):  
Fracture Toughness ◽  
Experimental Work ◽  
Compact Tension ◽  
Specimen Thickness ◽  
Crosshead Speed ◽  
Operation Conditions ◽  
Pvc Pipe ◽  
Point Bend ◽  
Materials Used ◽  
Pipe Materials

In many modern engineering applications, designers and manufacturers of Polyvinyl chloride (PVC) pipes are interested in the evaluation of fracture toughness under several operation conditions. The aim of the present work is to investigate the fracture toughness of commercial amorphous thermoplastic PVC materials used in piping applications. The experimental work is carried out using three different specimens’ types: Taper Double Cantilever Beam (TDCB), Three Point Bend (TPB), and Compact Tension (CT). Tests are conducted on specimens with thickness (17, 20, 22, and 26 mm), longitudinal and transverse extrusion orientations, at different crosshead speeds (50–500 mm/min) to calculate the fracture toughness of PVC pipe materials. The experimental work has revealed that the crosshead speed has a significant effect on the fracture toughness at low speed rates. This effect, however, becomes insignificant at high rates since, the fracture behavior becomes brittle. The stress intensity factor KQ is approximately the same in both longitudinal and transverse orientations. The fracture toughness decreases as the specimen thickness increases.

scholarly journals Effects of pipe materials on biofouling under controlled hydrodynamic conditions

2015 ◽  
Vol 6 (1) ◽  
pp. 167-174 ◽  
Author(s):  
S. Gamri ◽  
A. Soric ◽  
S. Tomas ◽  
B. Molle ◽  
N. Roche
Keyword(s):  
Growth Control ◽  
Surface Characteristics ◽  
Primary Role ◽  
Pipe Material ◽  
Hydrodynamic Conditions ◽  
Biofilm Growth ◽  
Pipe Surface ◽  
Biofilm Detachment ◽  
Pvc Pipe ◽  
Pipe Materials

Experiments were carried out to investigate pipe material impacts on biofouling, at high effluent concentration levels and under controlled hydrodynamic conditions. Two velocities (0.4 and 0.8 m s−1) were used to monitor biofilm growth on polyethylene (PE) and polyvinylchloride (PVC) pipe walls, respectively. These conditions were established based on wastewater irrigation practices. A decrease in biomass is observed after 49 days of experiments for both velocities and may be related to biofilm detachment. Biofilm growth is greater at 0.8 m s−1. For both velocities, PVC is less sensitive to biofilm growth than PE. Pipe straightness plays a primary role in biofilm growth control. This effect is more significant than pipe surface characteristics (roughness, hydrophobic/hydrophilic properties).

Effect of Moulding Temperature on Flexure, Impact Strength and Interlaminar Fracture Toughness of CF/PEI Composite

1996 ◽  
Vol 15 (11) ◽  
pp. 1117-1130 ◽  
Author(s):  
Meng Hou ◽  
Lin Ye ◽  
Yiu-Wing Mai
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Impact Strength ◽  
Woven Fabric ◽  
Mode I ◽  
Mode Ii ◽  
Void Content ◽  
Processing Conditions ◽  
Interlaminar Fracture ◽  
Fracture Growth

The effects of processing conditions on the mechanical properties of a CF/PEI woven fabric composite have been investigated. A compression moulding procedure using a hot press was applied to simulate the effects of various processing conditions. The mechanical properties of the CF/PEI composite were characterised by flexure, impact strength and interlaminar fracture tests in relation to the consolidation quality. Consolidation quality was studied through void content and density measurement. The results indicated that the consolidation quality of the composites was highly dependent on the processing temperature. The flexure properties. Mode I and Mode II fracture toughness for crack initiation and Mode II interlaminar fracture growth resistance correlated directly with consolidation quality. However, the Charpy impact strength and Mode I interlaminar fracture growth resistance both increased as the void content was increased because of a “multiple-crack” failure mechanism.

Sign in / Sign up

Export Citation Format

Share Document