Nonlocal modeling of bi-material and modulus graded plates using peridynamic differential operator

Mehmet Dorduncu*, Akif Kutlu, Erdogan Madenci, Timon Rabczuk

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19 Atıf (Scopus)

Özet

This study presents the application of the peridynamic differential operator (PDDO) on modeling of bi-material plates with/without modulus graded regions. The PDDO converts the Navier’s equilibrium equations and boundary conditions from the differential form into the integral form. The mismatch of the stiffness along the interface of two distinct materials results in an increase in the strain and stress variations, leading to the onset of cracking at the free corners of the interface. The interfacial strains and stresses can be mitigated by inserting a modulus graded layer between two different materials. The material properties in the modulus graded region is achieved through the power-law distribution. The efficacy of the proposed approach is demonstrated by considering a bi-material square plate under tension. The PDDO displacement, strain, and stress predictions are compared with the reference solutions, and good correlations are achieved. The influence of a modulus graded region with/without a pre-existing crack located between dissimilar materials is investigated for different material variations. It is noted that the PDDO performs very well on the displacement, strain, and stress predictions even if the solution domain has geometrical or material discontinuities. Moreover, modulus graded regions offer some advantages over the sharp interfaces and alleviate the strain and stress concentrations along the interface of the dissimilar materials.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)893-909
Sayfa sayısı17
DergiEngineering with Computers
Hacim39
Basın numarası1
DOI'lar
Yayın durumuYayınlandı - Şub 2023

Bibliyografik not

Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature.

Finansman

This study has been supported by The Scientific and Technological Research Council of Turkey (TUBITAK) with the project number: 219M207. This support is gratefully acknowledged. Also, Dr. Dorduncu and Dr. Kutlu acknowledge the funding support was granted by the German Academic Exchange Service (DAAD) and TUBITAK-BIDEB under International Post-Doctoral Research Fellowship Programme 2219, respectively.

FinansörlerFinansör numarası
TUBITAK-BIDEB
Deutscher Akademischer Austauschdienst
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu219M207

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