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Popravni količniki za izračun Youngovega modula iz resonančnega upogibnega nihanja
Štubňa, Igor (Author), Trnik, Anton (Author)

URLURL - Presentation file, Visit http://www.dlib.si/details/URN:NBN:SI:doc-I3WPN0CF This link opens in a new window

Abstract
Enostavna enačba, dobljena iz poenostavljene diferencialne enačbe upogibnega nihanja za primer z enakomernim prerezom, nam ne da točne vrednosti Youngovega modula oz. hitrosti zvoka, če je razmerje dolžine in premera (oz. dolžine in debeline) vzorca manjše od 20. Napako lahko odpravimo z množenjem izmerjene resonančne frekvence ali izračunanega Youngovega modula s popravnim količnikom. V prispevku predstavljamo nekaj enačb za popravne količnike in novo enačbo ter jih primerjamo z enačbami Ameriškega združenja za preizkušanje in materiale (American Society for Testing and Materials - ASTM).

Language:English
Keywords:upogibna nihanja, frekvence resonančne, Youngovi Moduli, izračini, flexural vibrations, resonant frequencies, Young's modulus, calculations
Work type:Not categorized (r6)
Tipology:1.03 - Short Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Year:2006
Publisher:Association of Mechanical Engineers and Technicians of Slovenia et al.
Number of pages:str. 317-322
Numbering:Letn. 52, št. 5
UDC:534.2:681.892
ISSN on article:0039-2480
COBISS.SI-ID:9526555 Link is opened in a new window
Views:557
Downloads:122
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Record is a part of a journal

Title:Strojniški vestnik
Shortened title:Stroj. vestn.
Publisher:Zveza strojnih inženirjev in tehnikov Slovenije [et al.], = Association of Mechanical Engineers and Technicians of Slovenia [et al.]
ISSN:0039-2480
COBISS.SI-ID:762116 This link opens in a new window

Secondary language

Language:Unknown
Title:Correction coefficients for calculating the Young's modulus from the resonant flexural vibration
Abstract:
A simple formula derived from the simplified differential equation of flexural vibration of a sample with a uniform cross-section does not give exact values for the Young's modulus or the velocity of sound if the ratio of the length to the diameter (or the length to the thickness) of the sample is less than 20. The error can be eliminated by multiplying the measured resonant frequency or the calculated Young's modulus by a correction coefficient. Some formulae for the correction coefficients as well as a new formula are presented and compared with the ASTM formulae.


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