Simultaneous Measurement of Torque, Axial Normal Force and Volume Change in the NIST Torsional Dilatometer

Published

July 1, 2000

Author(s)

Carl R. Schultesiz, G B. McKenna

Abstract

The NIST Torsional Dilatometer measures simultaneously the torque, axial normal force and volume change in response to a torsional deformation. While the torque is a linear function of the angle of twist per unit of length, the normal force and volume change are effects of geometrical nonlinearities. In stress-relaxation experiments with an epoxy cylinder near its glass transition temperature, the torque and normal force decay monotonically, but the volume change associated with the torsion shows a significant non-monotonic decay at lower temperatures. The measurements are investigated with a series solution for torsion of an elastic, compressible material (Murnagham, F.D. (1951) Finite Deformation of an Elastic Solid Wiley, New York).

Proceedings Title

Annual Technical Conference of Materials Society of Plastics Engineers | 58th |

Volume

2

Conference Dates

May 1, 2000

Conference Location

Undefined

Conference Title

Technical Papers of the Annual Technical Conference-Society of Plastics Engineers Incorporated

Pub Type

Conferences

Keywords

axial normal force, dilatometry, finite deformation, second order theory, torque, torsion, viscoelasticity, volume change

Citation

Schultesiz, C. and McKenna, G. (2000), Simultaneous Measurement of Torque, Axial Normal Force and Volume Change in the NIST Torsional Dilatometer, Annual Technical Conference of Materials Society of Plastics Engineers | 58th |, Undefined (Accessed October 27, 2025)