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| Engineering Physics : Faculty : | |
| Arthur S. Lodge |
| Arthur S. Lodge Professor Emeritus |
3010 Woods Edge Way Madison, WI 53711 |
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Tel: 608/278-0249 Fax: 608/278-0249 E-mail: aslodge@facstaff.wisc.edu |
BOOKS:
1964 Elastic Liquids (Academic Press)
1974 Body Tensor Fields in Continuum Mechanics (Academic Press)
1999 An Introduction to Elastomer Molecular Network Theory (The Bannatek Press, Madison, WI)
Professor Lodge's work focuses on on-line measurement of polymer melt elasticity and viscosity: a slit-die rheometer (called a "Stressmeter") has been developed for on-line and sample measurement of the absolute viscosity and the first normal stress difference in steady shear flow at shear rates up to 3000 sec-1 and shear stresses up to 200 kPa. Data obtained for a commercial polystyrene melt (Styron 678) at 180 to 208°C agree with cone-plate data in the common region of shear rates.
On-line data for polymer solutions of changing composition taken previously with a similar instrument show that the elasticity measurement is extremely sensitive to small changes in the high-molecular-weight tail of the molecular weight distribution. The new instrument is very robust; a reasonable blow with a hammer made during measurement had no noticeable effect on the readings. The instrument is now commercially available.
High Shear-Rate Measurements: Another version of the Stressmeter measures similar properties for lubricating oil samples at shear rates reaching 1,000,000 sec-1 and at temperatures up to 150°C.
Professor Lodge's first book, Elastic Liquids (1964), popularized the "Lodge rubberlike liquid", the foundation for contemporary nonlinear viscoelasticity. Lodge has developed network theories to describe the nonlinear viscoelastic behavior of polymer melts and concentrated solutions. Elastic Liquids was also published in Russian and Japanese. It was in this book that Lodge developed the notion of "body tensor fields." He further developed and refined this idea in his second book, Body Tensor Fields in Continuum Mechanics, with Applications to Polymer Rheology (1974). The methods set forth in this book have been used to set up and solve some classes of problems that would be difficult to do by other means; for example, Lodge has shown how to obtain the unsteady-state versions of the Reiner-Rivlin equation and the Criminale-Ericksen-Filbey equation.
Professor Lodge has published two books and over 80 journal articles on macroscopic continuum mechanics for materials with memory, molecular theories of viscoelasticity and rheological measurements on polymeric liquids. Lodge has been awarded the Bingham Medal of The Society of Rheology and the Gold Medal of the British Society of Rheology. In 1992, he was elected to membership in the National Academy of Engineering.
In 1981, Professor Lodge incorporated the Bannatek Company to manufacture and market Stressmeters.
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Copyright 2005 The Board of Regents of the University of Wisconsin System Date last modified: Monday, 09-Jun-2003 11:09:48 CDT Content by: aslodge@facstaff.wisc.edu Thank you for visiting /ep/faculty/lodge_arthur.html |
