WIT Press

Solving Inverse Problems In Relaxation Experiments

Price

Free (open access)

Paper DOI

10.2495/CP000221

Volume

28

Pages

10

Published

2000

Size

752 kb

Author(s)

V. Shtrauss

Abstract

Inverse problems of performing integral transforms with kernels depending on the division or product of arguments are considered in the study of linear viscoelastic behaviour of solid materials. Mechanism of arising instability of the solution is disclosed. An approach of solving the inverse problems is proposed by combining the logarithmic transformation of signal scale with digital filtering and utilizing sampling as a regularization tool to minimize output error. As an example, inherently ill-conditioned problem of the relaxation analysis is considered. 1 Introduction Two key features characteristic for study of viscoelastic [1, 2] and other relaxation (electric [2], magnetic [3]) behaviour of solid materials, such as polymers and composites, are as follows: (i) mechanical creep and relaxation, as well as similar el

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