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Search Publications by: Dick Rhorer (Assoc)

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Displaying 51 - 75 of 82

Smart Machining Systems: Issues and Research Trends

November 1, 2005
Author(s)
Laurent Deshayes, Lawrence A. Welsch, Alkan Donmez, Robert W. Ivester, David E. Gilsinn, Richard L. Rhorer, Eric P. Whitenton, Florian Potra
Smart Machining Systems (SMS) are an important part of Life Cycle Engineer-ing (LCE) since its capabilities include: producing the first and every product correct; improving the response of the production system to changes in demand (just in time)

Smart Machining Systems: Issues and Research Trends

January 1, 2005
Author(s)
Laurent Deshayes, Lawrence A. Welsch, Alkan Donmez, Robert W. Ivester, David E. Gilsinn, Richard L. Rhorer, Eric P. Whitenton, Florian Potra
Smart Machining Systems (SMS) should be an important part of Life Cycle Engineering (LCE) since its capabilities are: producing the first and every product correct; improving the response of the production system to changes in demand (just in time)

Influence of Heating Rate on Flow Stress in High-Speed Machining Processes

April 1, 2004
Author(s)
Timothy J. Burns, Robert W. Ivester, Michael Kennedy, Richard L. Rhorer, Matthew A. Davies, Howard Yoon, Lyle E. Levine, Richard J. Fields, D Basak, Eric P. Whitenton
For several decades, a major focus of machining research has been the measurement and prediction of temperature. Here, the influence of the rate of heating on the flow stress, and the implications of this for finite-element modeling of high speed metal

Thermal Imaging of Metals in a Kolsky-Bar Apparatus

October 1, 2003
Author(s)
Howard W. Yoon, D Basak, Richard L. Rhorer, Eric P. Whitenton, Timothy J. Burns, Richard J. Fields, Lyle E. Levine
For materials testing at elevated temperatures, we describe the design and the development of a resistively heated Kolsky-bar apparatus. The temperature of the sample is determined by non-contact thermometry and the spatial temperature gradients in the

Kolsky Bar With Electrical Pulse Heating of the Sample

June 1, 2003
Author(s)
Eric P. Whitenton, Michael Kennedy, Matthew A. Davies, Gerald V. Blessing, Brian S. Dutterer, Richard L. Rhorer, Howard W. Yoon, Lyle E. Levine, Richard J. Fields, D Basak, Timothy J. Burns
The accuracy of simulations for modeling of machining processes is often limited due to insufficient knowledge of the material properties during machining, which can involve strain rates on the order of 104 per second or higher, plus rapid material heating

Constitutive Model Data for Machining Simulation Using the NIST Pulse-Heat Kolsky Bar

January 1, 2003
Author(s)
Eric P. Whitenton, Michael Kennedy, Matthew A. Davies, Gerald V. Blessing, Brian S. Dutterer, Richard L. Rhorer, Howard W. Yoon, Richard J. Fields, D Basak, Timothy J. Burns
A new facility for dynamic material testing using a traditional Kolsky bar with the addition of controlled electrical-resistive pulse heating has been established at the National Institute of Standrds and Technology (NIST). Dynamic stress-strain data have

Thermal Imaging of Metals in a Kolsky-Bar Apparatus

January 1, 2003
Author(s)
Eric P. Whitenton, Richard L. Rhorer, Howard W. Yoon, D Basak, Richard J. Fields, Lyle E. Levine, Timothy J. Burns
For materials testing at elevated temperatures, we describe the design and the development of a resistively heated Kolsky-bar apparatus. The temperature of the sample is determined by non-contact thermometry and the spatial temperature gradients in the

Nanomanufacturing of Atom-Based Dimensional Standards - A Final Project Report of the NAMT

January 1, 2002
Author(s)
Robert Allen, J J. Pellegrino, D Monk, E C. Teague, Dennis A. Swyt, Joseph Fu, Richard M. Silver, Theodore V. Vorburger, Bradley N. Damazo, Robert Russell, Thomas E. Wheatley, Keith A. Stouffer, Manfred Osti, David Wilmering, Richard L. Rhorer, Ram D. Sriram
This report describes the accomplishments of the Nanomanufacturing of Atom-based Dimensional Standards Project, which operated as part of the National Advanced Manufacturing Testbed (NAMT) a program formally operating from fiscal year (FY) 1996 to FY 2000

The Precision Alignment of a Kolsky Bar Apparatus

January 1, 2002
Author(s)
Timothy J. Burns, Brian S. Dutterer, Michael Kennedy, Matthew A. Davies, Richard L. Rhorer
The modeling of machining processes is often limited by the availability of material data appropriate for the high strain rates and rapid heating associated with the metal cutting process. A new NIST facility - the pulse heated Kolsky bar apparatus - has