ISSN:
0032-3888
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Characteristics of several impact test methods in current use are discussed. The construction, operation and performance of an instrumented plate-projectile (IFF) impact tester is described. Force-strain curves, energies to any point in the test and failure modes may be inferred from the test data. Also, by inspection of the tested plate, one can see if there are cracks, blanching (development of microvoids) or ductile deformation. This inspection distinguishes between local and catastrophic failure - an important distinction in selection of materials for specific uses. There is reasonable correlation between values from notched Izod and IPP tests, with the latter somewhat more sensitive. Data illustrate the distinction between good and poor fiber-to-matrix coupling in reinforced polypropylene. Although there is some sacrifice of impact strength with improved fiber-matrix coupling, this is more than counteracted by the improvement in static strength and creep resistance. The data show that coupled glass-reinforced impact grade polypropylene exhibits an interesting balance of static to impact properties.
Additional Material:
19 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pen.760160607
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