Experimental studies on structural load monitoring using piezoelectric transducer based electromechanical impedance meth
Journal Title: Scientific Journal of Review - Year 2013, Vol 2, Issue 1
Abstract
In general aerospace, civil and mechanical (ACM) structures are often subjected to some or the other forms of loading during their service life. It has been reported that about 75% of aerospace structures fail due to fatigue cyclic loading. The civil-structural components are subjected to some form of axial and transverse loading which continuously deteriorates the health of the structure. Mechanical components are also subjected to stresses due to contact pressures between several components. Thus for ACM structures, effective monitoring through-out the entire life is required as these often involve public life and huge investments. Owing to such necessity, researchers around the world are continuously working on the development of smart sensor based effective monitoring techniques. Piezo electric (PZT) transducer based electromechanical impedance (EMI) is one such technique which was developed for structural health monitoring (SHM). In this technique, PZT transducers are usually attached to the structure to be monitored and are then subjected to unit sinusoidal electric voltage to generate the electromechanical (EM) admittance signatures when interrogated to the desired frequency range of excitations. These signatures consist of real (conductance) and imaginary (susceptance) parts which serve as indicator to predict the structural health. Any deviations in these signatures during the monitoring period indicate disturbance in the structure. However, the EMI technique was not widely explored for structural load monitoring (such as fatigue cyclic load, monotonous load, axial and transverse load) compared to damage detection. In this paper, systematic experiments were presented on the specimens for axial load variations, transverse load variations, monotonous and fatigue load variation with discussions on boundary effect and buckling effects. For axial, fatigue, monotonic load, the conductance was found to be effective where as for transverse load monitoring susceptance was found to be effective. This paper summarizes different types of loading effects related to EMI.
Authors and Affiliations
M. A. Radhika| Laboratory of Monitoring Science, Nanyang Technological University, 50 Nanyang, Avenue. Singapore 639798., V. G. M. Annamdas| Laboratory of Monitoring Science, Nanyang Technological University, 50 Nanyang, Avenue. Singapore 639798.
Keywords
Related Articles
- EP ID EP55
- DOI -
- Views 624
- Downloads 37
Expansion and reduction in translation: a case study of hyperbole in the persian translation of euripides's andromache a
Hyperbole is one of the most widely used figure of speech in heroic texts, a long neglected form of non-literal language. The present study set out to determine the extent of expansion and reduction in the translation of...
Analyzing the fluidity of iwan’s space in traditional houses of Bushehr
The reason tochoose this issue is paying attention to the spatial fluidity of Iwan andcommunicational and functional values of various kinds of Iwan in traditionalhouses of Boushehr. The traditional architecture provides...
Introduction to calcareous algae in Esfiyukh Mountain
In this research the biostratigraphy in Esfiyukh Mountain (5km of North-east of Torbat-e-Heydarieh) is studied for the first time. Thedeposits in this section are about 175 meters thickness; lithology consists ofalternat...
Evaporation modeling with artificial neural network: A review
Evaporation from the open pan as well as surface is a complex phenomenon of the hydrological cycle and influenced by many meteorological parameters, such as rainfall, temperature, relative humidity, wind speed and bright...
Are input and output alone in SLA communications?
This paper aims to check whether the mere materials of SLA are input and output or there is another practical option. To this aim, some perspectives reviewed and some studies compared in terms of the correct form and...