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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/10825
Title: A numerical prediction of flexural strength probability for NBG-18 nuclear grade graphite using strength pair model
Authors: Bansal M.
Singh, Indra Vir
Mishra, B. K.
Sharma K.
Khan I.A.
Published in: Journal of Strain Analysis for Engineering Design
Abstract: In this work, a strength pair model has been proposed for the numerical prediction of flexural strength probability of NBG-18 nuclear grade graphite. The input to the proposed model is a random strength pair of tensile and compressive strengths whose value is based on its probability of occurrence in the experimental data. A finite element-based deterministic numerical approach has been implemented. To account for the large difference in tensile and compressive strengths, Drucker-Prager failure criteria has been implemented. The failure envelope of the Drucker-Prager failure criteria is assumed to have uniaxial fit with Mohr-Coulomb model in the principal stress space. A total of 292 simulations with random pairs of tensile and compressive strength are performed on a three-point bend specimen to obtain a set of flexural strength data. The flexural strength data obtained through numerical simulations are fitted using normal and Weibull distributions. The flexural strength probability obtained from the proposed model is found on conservative side. A goodness-of-fit test concludes that Weibull distribution fits the numerical data better than normal distribution. © Institution of Mechanical Engineers.
Citation: Journal of Strain Analysis for Engineering Design (2017), 52(3): 204-211
URI: https://doi.org/10.1177/0309324717698609
http://repository.iitr.ac.in/handle/123456789/10825
Issue Date: 2017
Publisher: SAGE Publications Ltd
Keywords: finite element method
flexural strength
Nuclear graphite
statistical analysis
strength pair model
ISSN: 3093247
Author Scopus IDs: 55531336500
57204061377
55578538300
16234476200
56003932700
Author Affiliations: Bansal, M., Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, India
Singh, I.V., Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, India
Mishra, B.K., Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, India
Sharma, K., Reactor Structures Section, Reactor Safety Division, BARC, Mumbai, India
Khan, I.A., Reactor Structures Section, Reactor Safety Division, BARC, Mumbai, India
Corresponding Author: Singh, I.V.; Department of Mechanical and Industrial Engineering, Indian Institute of Technology RoorkeeIndia; email: indrafme@iitr.ac.in
Appears in Collections:Journal Publications [ME]

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