ARTICLE
Fracture analysis for viscoelastic creep using peridynamic formulation
1
Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Malaysia
Submission date: 2021-10-27
Final revision date: 2022-06-10
Acceptance date: 2022-06-27
Online publication date: 2022-08-25
Publication date: 2022-11-25
Corresponding author
Muhammad Azim Azizi
Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia, Malaysia
Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia, Malaysia
Journal of Theoretical and Applied Mechanics 2022;60(4):579-591
KEYWORDS
TOPICS
ABSTRACT
The purpose of this paper is to provide a peridynamic (PD) model for the prediction of the
viscoelastic creep deformation and failure model. The viscoelastic characteristic consists of
several stages, namely primary creep, secondary creep, tertiary creep and fracture. A non-
linear viscoelastic creep equation based on the internal state variable (ISV) theory covering
four creep stages and PD equations are used. The viscoelastic equation is inserted into the
PD equation to derive a PD model with two time parameters, i.e., numerical time and vis-
coelastic real time. The parameters of the viscoelastic equation are analyzed and optimized.
A comparison between numerical and experimental data is performed to validate this PD
model. The new PD model for nonlinear viscoelastic creep behavior is confirmed by an ac-
ceptable similarity between the numerical and experimental creep strain curves with an error
of 15.85%. The nonlinearity of the experimental and numerical data is sufficiently similar as
the error between the experimental and numerical curves of the secondary stage strain rate
against the load is 21.83%. The factors for the errors are discussed and the variation of the
constants in the nonlinear viscoelastic model is also investigated.
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| eISSN: | 2543-6309 |
| ISSN: | 1429-2955 |
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