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Sensitivity of the dual-probe heat-pulse method to spatial variations in heat capacity and water content

Authors
Publisher
Soil Science Society of America
Publication Date
Keywords
  • 010200 Applied Mathematics
  • 040600 Physical Geography And Environmental Geoscience
  • 050300 Soil Sciences
  • 050305 Soil Physics
  • 070300 Crop And Pasture Production

Abstract

AIMTDRp1 COVER SHEET Yarlagadda, Prasad KDV and Berg, Klaus (2001) An Innovative Technique for Rapid Product Development by Using Stereolithography Process and Microwave Radiation. In Proceedings All India Machine Tool Design and Research Conference, India. Copyright 2001 (please consult author) Accessed from http://eprints.qut.edu.au An Innovative Technique for Rapid Product Development by Using Stereolithography Process and Microwave Radiation Prasad KDV Yarlagadda and Klaus Berg School of Mechanical, Manufacturing and Medical Engineering Queensland University of Technology, GPO Box 2434 Brisbane Q 4001 Australia E-Mail: [email protected] [email protected]_________________________________ Summary This work attempts to investigate the feasibility of curing epoxy resin layers using microwaves for physical models and prototypes. Investigations have been carried out to use epoxy resins or a combination of epoxy resin mixed with a different material in powder form followed by a curing process using microwave radiation. The microwave radiation supports the polarisation of epoxy resin through heating based on the effect of the dielectric property. The curing process of the epoxy resin using microwave radiation takes place more rapidly and supports the temperature rise, as the dielectric value of the epoxy resin rises with an increase in temperature, primarily through changes in frequency. The maximum increase in temperature takes place at a critical frequency. The penetration of the microwaves through the epoxy resin is controlled by the wavelength of microwave radiation as a function of the frequency. Reducing the operational frequency of microwave radiation compensates an increase in thickness of the layer. In this work attempts have been made to determine the relationship between curing time, curing temperature for different mixtures of epoxy resin and hardener.

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