Establishing The Validity Of The Master Curve Technique For Complex Modulus Data Reduction
Report Number: WL-TR-91-3078 Volume I, p. DBC-1 thru DBC-20
Author(s): Oyadiji, S. O., Tomlinson, O. R.
Corporate Author(s): Dynamics and Control Research Group, Department of Engineering, University of Manchester
Laboratory: Wright Laboratory
Date of Publication: 1991-08
Pages: 20
Contract: Laboratory Research - No Contract
DoD Project: 2401
DoD Task: 240104
Identifier: This paper is part of a conference proceedings. See ADA241311
Abstract:
The applicability of the master curve technique for the reduction of temperature- and frequency-dependent complex modulus data to a set of "master" complex modulus curves, which depend on only one variable, is validated for a polyisoprene rubber of shore hardness 55. Using the direct stiffness method, complex Young's modulus data was determined for a sample of the material over 2 narrow frequency bands of 2 octaves each and a wide temperature range of -60C to 100C. Small temperature intervals of 2C at low temperatures rising to 20C at high temperatures were used in the tests. This resulted in two sets of "temperature-dominated" complex modulus data from which smooth, continuous master curves were generated by the application of the master curve technique. The procedure was repeated for a wider test frequency range of 2 decades, the same temperature range but larger temperature increments of 1 0C at low temperatures nsmg to SOC at high temperature. This resulted in a "frequency-dominated" complex modulus data set from which master curves were again obtained. It is shown that the master curves obtained from the three data sets correlate quite well.
Author(s): Oyadiji, S. O., Tomlinson, O. R.
Corporate Author(s): Dynamics and Control Research Group, Department of Engineering, University of Manchester
Laboratory: Wright Laboratory
Date of Publication: 1991-08
Pages: 20
Contract: Laboratory Research - No Contract
DoD Project: 2401
DoD Task: 240104
Identifier: This paper is part of a conference proceedings. See ADA241311
Abstract:
The applicability of the master curve technique for the reduction of temperature- and frequency-dependent complex modulus data to a set of "master" complex modulus curves, which depend on only one variable, is validated for a polyisoprene rubber of shore hardness 55. Using the direct stiffness method, complex Young's modulus data was determined for a sample of the material over 2 narrow frequency bands of 2 octaves each and a wide temperature range of -60C to 100C. Small temperature intervals of 2C at low temperatures rising to 20C at high temperatures were used in the tests. This resulted in two sets of "temperature-dominated" complex modulus data from which smooth, continuous master curves were generated by the application of the master curve technique. The procedure was repeated for a wider test frequency range of 2 decades, the same temperature range but larger temperature increments of 1 0C at low temperatures nsmg to SOC at high temperature. This resulted in a "frequency-dominated" complex modulus data set from which master curves were again obtained. It is shown that the master curves obtained from the three data sets correlate quite well.