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Vibratory Cavitation Erosion With Vibrating and Stationary Specimens

Y. Meged
Vibratory Cavitation Erosion With Vibrating and Stationary Specimens by Y. Meged PDF

Author : Y. Meged
Publisher :
Page : 30 pages
File Size : 28,86 MB
Release : 2014
Category : Cavitation erosion
ISBN :

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In the framework of the International Cavitation Erosion Test (ICET), 119 vibratory cavitation erosion tests were performed. Seventy of these tests were with vibrating specimens (VRV), and forty-nine with stationary specimens (VRS). From these tests, twenty tests of each type were chosen for this study. VRV tests are covered by ASTM G32-10, whereas for VRS, no standard has yet been published. This anomaly stems from the difficulties encountered in both testing and evaluating of VRS tests. All forty cavitation erosion-time curves were analyzed by the Transient Response for Erosion (TRE) method. For each curve, all three parameters were determined, namely: time lag (TL), time constant (?), and the asymptotic value of the mean depth of erosion, mean depth of erosion (MDE) MDEMAX. These parameters were further applied to calculate the scatter of test results as obtained from various specimens tested under identical conditions. This method enables the determination of the absolute and relative scatter values at any time value along the test. Finally, several guidelines are specified for preparation of a future VRS standard.

Modeling of Vibratory Cavitation Erosion Test Results by a Weibull Distribution

Y. Meged
Modeling of Vibratory Cavitation Erosion Test Results by a Weibull Distribution by Y. Meged PDF

Author : Y. Meged
Publisher :
Page : 10 pages
File Size : 12,87 MB
Release : 2003
Category : Modeling
ISBN :

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The rate of mass loss in vibratory cavitation erosion tests varies with time. As a consequence, this process is treated empirically. It is suggested by the author that the cumulative mass loss-time curve test results can be represented accurately by the Weibull cumulative distribution function. This model was verified for 26 tests of nine metals. Among these metals is Ni 200, which is a standard reference material for erosion tests. This model allows treating the results of vibratory cavitation erosion tests analytically, thereby obtaining invaluable information from the test data.

Influence of Test Paraments in Vibratory Cavitation Erosion Tests

M. Matsumura
Influence of Test Paraments in Vibratory Cavitation Erosion Tests by M. Matsumura PDF

Author : M. Matsumura
Publisher :
Page : 25 pages
File Size : 15,43 MB
Release : 1979
Category : Brittle fractures
ISBN :

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A series of tests on iron and steel in a water tunnel system, which simulated field conditions quite closely, showed that each material has its own process of erosion, and that in general the fracture of metals by cavitation turns from ductile to brittle with the lapse of testing time.