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1、INTERNATIONAL STANDARD IS0 6721-4 First edition 1994-l I-01 Plastics - Determination of dynamic mechanical properties - Part 4: Tensile vibration - Non-resonance method Plastiques - Dktermination des propri - ( 1 La p . . . (3) The transducer output will have a significant error for all applied freq
2、uencies such that f OllfF . . . (5) The resonance frequency fi of the force transducer and supported mass m, can be determined directly by recording the natural frequency of the transducer output after striking the attached clamp without the specimen. The specimen stiffness corrected for transducer
3、res- onance is given to a good approximation by the equation k=k+ - 4 2f) = b to see IS0 6721-1 :I 994, clause 12; m): n) the dynamic strain amplitude given ap- proxrmately by sA/La Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technica
4、l Standards 1/9972545001 Not for Resale, 04/25/2007 01:40:46 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 6721-4:1994(E) 0 IS0 Key: F Force transducer CIJ c2 Clamps S Test specimen D Displacement transducer V Vibrator Figure 1 - Schematic diagram of a suitable loadin
5、g assembly for determining dynamic moduli by a tensile forced non-resonance method 6 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 01:40:46 MDTNo reproduction or networking per
6、mitted without license from IHS -,-,- IS0 6721-4:1994(E) ICS 83.080.00 Descriptors: plastics, rigid plastics, tests, vibration tests, determination, mechanical properties, dynamic properties, tensile modulus, test equipment. Price based on 6 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 01:40:46 MDTNo reproduction or networking permitted without license from IHS -,-,-