ISSN:
0193-7197
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
The effect of processing on the fracture toughness and fatigue crack propagation rates in unplasticized PVC pipes, both along and perpendicular to the extrusion direction, is evaluated in this paper. The methylene chloride test is used to distinguish between well processed and poorly processed pipes. Well processed pipes have higher fracture toughness under monotonic loading test conditions. However, under impact conditions processing has no significant effects on notched Charpy fracture toughness. For the well processed pipes, there is no directional effect on the fatigue crack propagation rates. For the poorly processed pipes, fatigue crack growth is faster in the extrusion direction, but slight improvement in the processing level removes this difference. Generally, fatigue in the longitudinal direction is independent of the level of processing, but in the transverse (extrusion) direction it is quite sensitive to variations in processing.
Additional Material:
13 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/vnl.730070403
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