Modeling of multiple phase solid microstructures and prediction of mechanical behaviors of foamed concrete

Ji Su Kim, Sang Yeop Chung, Tong Seok Han, Dietmar Stephan, Mohamed Abd Elrahman

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Mechanical behaviors of foamed concrete, which is a cellular lightweight binder with entrained air voids, are evaluated using the phase field fracture model in a finite element framework. A methodology to identify the micro-scale material properties/parameters of the foamed concrete to predict their macro-scale mechanical behaviors is presented. Multiple phase solid virtual specimens are obtained from the analysis of X-ray micro-CT images, and the input material modeling parameters for the corresponding phases are identified through a series of calibration processes. The similarities and differences in mechanical responses, including stress vs. strain relations and crack patterns from single and multiple phase solid microstructures, are analyzed. The multiple phase solid model shows great potential for enabling detailed analyses of the mechanical behaviors of foamed concrete. With further investigations involving calibrations of the input material modeling parameters using more detailed experiments, the proposed framework is found to be a promising choice for supplementing time- and effort-intensive real experiments.

Original languageEnglish
Article number118637
JournalConstruction and Building Materials
Volume248
DOIs
Publication statusPublished - 2020 Jul 10

Bibliographical note

Funding Information:
This research was supported by the National Research Foundation Grant (NRF-2019R1A2C2086314) and the German Federal Ministry of Education and Research (BMBF, Project Number: 13XP5010B). This work was also supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20174030201480). The X-ray CT images were obtained from Dr. Paul H. Kamm at Helmholtz-Zentrum, Berlin, Germany.

Funding Information:
This research was supported by the National Research Foundation Grant ( NRF-2019R1A2C2086314 ) and the German Federal Ministry of Education and Research (BMBF, Project Number: 13XP5010B). This work was also supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20174030201480). The X-ray CT images were obtained from Dr. Paul H. Kamm at Helmholtz-Zentrum, Berlin, Germany.

Publisher Copyright:
© 2020 Elsevier Ltd

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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