Document Type and Number:
Japanese Patent JPS5326149
Kind Code:
B2
Abstract:
Materials, or structural components are tested under resonance conditions by means of a pressure operated load mechanism controlled by a servo-hydraulic control unit. The pressure medium is part of the oscillating system. The spring rate or stiffness of the pressure medium is adjusted relative to the spring rate of the test sample, or rather relative to the spring rate of the entire oscillating system in such a manner that the maximum pressure occurring at resonance operation corresponds as close as possible to the rated supply pressure of the system. The load mechanism comprises a single cylinder for producing dynamic loads for the resonance operation and also static loads of substantially the same size as said dynamic loads.
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Application Number:
JP15971775A
Publication Date:
July 31, 1978
Filing Date:
December 27, 1975
Export Citation:
International Classes:
G01N3/34; G01N3/36