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Session 2168

Application of LabVIEW for Undergraduate Lab Experiments On Materials Testing

Ismail I. Orabi

University of New Haven

Abstract

This paper describes the implementation of LabVIEW, in a torsion experiment in the Mechanics Laboratory in the Mechanical Engineering Department at the University of New Haven, to allow the acquisition of real time data for display, analysis, control and storage. The input moment and the angle of twist are measured directly from torsion transducers. The real-time measurements and display acquired waveforms are displayed on a PC screen and the data associated with these waveforms are stored for later use. The aim is to be able to control and apply moment to a specimen, and collect data from the resulting deformation in the material. In the torsion test, the mechanical properties of the materials to a twisting moment are obtained by two transducers mounted on the bottom of the grips of the torsion machine. The torque and angle of twist are then acquired using LabVIEW software to obtain the yield shear stress, modulus of rigidity and the ultimate strength. The data acquisition system is provided using the following products from National Instruments: application programming interface; and LabVIEW, software development package. The Excel spreadsheet is used to analyze the results.

This work demonstrates that instrumentation experience is greatly enhanced by integration LabVIEW into the Laboratory. The incorporation of computer data acquisitions into the undergraduate laboratory provides students with a valuable tool for data collection and analysis.

Introduction

The use of a computer to imitate an instrument or device is known as virtual instrumentation. One software development package used to create virtual instruments is LabVIEW (Laboratory Virtual Instrument Engineering Workbench). LabVIEW is a graphical programming language that, when used in conjunction with a data acquisition device and personal computer, allows the user to control devices, collect, manipulate and display data. Written code is not used in LabVIEW, instead graphical representations of the circuits are constructed which are called Proceedings of the 2002 American Society of Engineering Education Annual Conference & Exposition Copyright © 2002, American Society of Engineering Education

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Orabi, I. (2002, June), Application Of Labview For Undergraduate Lab Experiments On Materials Testing Paper presented at 2002 Annual Conference, Montreal, Canada. 10.18260/1-2--10971