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Measuring elastic flexural properties on marble slabs by a LDV system

MONTI GIANNI1,*

Affiliation

  1. Institute for Measurement Systems and Sensor Technology, Technische Universität München Theresienstr. 90/N5, D-80333, Munich, Germany

Abstract

Quality control of individual marble slab used for construction purposes prior to their application allows an effective reduc-tion of security- and cost-relevant mechanical failures. Therefore, a non-destructive determination of flexural moduli of elas-ticity by consideration of marble’s anisotropic behaviour is necessary. Today’s relevant standardized measurement systems allow a reliable determination of such moduli exclusively on specimens with other geometries than slab shapes. A meas-urement system with a Laser Doppler Vibrometer (LDV) operating in accordance with an eigenfrequency method is intro-duced in this paper. This system is designed for automatic quality control environments and provides for fast and non-destructive determination of a reliable value range of flexural moduli with respect to a multitude of marble varieties. Results and advantages of the system are compared and discussed respectively to a frequently-used standardized ultrasonic measurement system..

Keywords

Laser Doppler Vibrometer, Anisotropic material testing, Structural engineering.

Submitted at: Sept. 21, 2013
Accepted at: May 15, 2014

Citation

MONTI GIANNI, Measuring elastic flexural properties on marble slabs by a LDV system, Journal of Optoelectronics and Advanced Materials Vol. 16, Iss. 5-6, pp. 536-541 (2014)