ORCID Profile
0000-0003-0292-8788
Current Organisation
Monash University
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: SAGE Publications
Date: 05-08-2021
DOI: 10.1177/15280837211034244
Abstract: In the present study, filament wound pipes were fabricated by glass and polypropylene (PP) yarns with the three different filament winding angles 55°, 70°, and 82°. Glass and PP yarns were wound around the pipe with two methods layered and hybrid. Epoxy resin was applied as a matrix to manufacture composite s les. It should be mentioned that composite s les were made in different layers. The three-point bending test was carried out on all s les to investigate the bending behavior of the composites. The experimental results showed that the winding angle 55° is better than other angles in terms of improving the flexural strength of the composite. Moreover, using hybrid yarn to fabricate the composite s le increases the flexural strength and energy absorption of the composite. In the next step, a multi-scale finite element model was applied to predict the flexural behavior of the composites. In this model, a unit-cell of each composite structure was modeled at the meso scale and elastic constants of the composites were extracted by a Python code. In addition, failure parameters for the composites were determined according to micromechanical equations. All elastic and failure parameters were utilized for the macro model and simulation three-point bending test. The numerical results were compared with the experimental and a good agreement could be observed between numerical and experimental results. So, the proposed model is proper to predict the mechanical behavior of the filament wound composite with high accuracy.
Publisher: Springer Science and Business Media LLC
Date: 08-2017
Publisher: Springer Science and Business Media LLC
Date: 09-2017
Publisher: SAGE Publications
Date: 06-11-2022
DOI: 10.1177/09544062211047357
Abstract: Thermal behavior such as heat transfer is an important parameter for construction composites. Three-dimensional textile reinforced concrete (TRC) is one of the construction composites which is recently being used in the building industry. Therefore, in this study, the thermal behavior of three different TRC s les was investigated by a heat transfer test using an infrared method. The cementitious matrix was reinforced by 3D fabric with three different spacer yarn orientation angles. The cementitious matrix was fabricated by cement and waste stone powder. The TRC s le was put on the hot plate of the heat transfer apparatus and the temperature variations of the top surface of the s le were obtained. According to the test results, increasing the orientation angle of spacer yarns leads to a decrease in the thermal conductivity of the TRC s le and reduces heat transfer. On the other hand, a theoretical model was used to calculate the thermal conductivity and resistance coefficients of sandwich s les. Furthermore, a 3D finite element model was used to predict the heat transfer of TRC specimens. A unit cell of the TRC model was created in Abaqus software and finite element (FE) analysis was carried on a created model. Thermal conductivity and thermal resistance of s les according to FE results were calculated and compared with experimental results. FE results showed good agreement with the experimental data.
Publisher: SAGE Publications
Date: 26-02-2015
Abstract: In this study, stone powder as a waste material was used to fabricate cementitious composite s les. Neat (non-modified) cementitious s les were composed of gravel, cement, sand, water, and waste stone powder. Flexural and compressive strength tests showed that flexural and compressive strength could be improved by increasing waste stone powder weight percentage. In addition, the experimental results illustrated that s les containing waste stone powder present more flexural and compressive strength in comparison with those fabricated without waste stone powder at constant cement weight percentage. In the next step, polypropylene and glass fibers were used in specimens containing waste stone powder. Consequently, flexural strength of fiber-reinforced composites was modeled by modifying “Equal Cross-Section Theory.” The results show that fibers increase flexural strength of specimens meanwhile, waste stone powder does not have a significant effect on compressive strength. In another step, it was tried to make cementitious composite s les containing perlite as a light aggregate. Cementitious composites containing waste stone powder and perlite presented more flexural and compressive strength compared to s les without waste stone powder.
Publisher: SAGE Publications
Date: 29-08-2016
Abstract: In this study, the influence of 3D fabric on the flexural behavior of cementitious composites has been investigated. Three 3D fabric s les were produced with different spacer yarn orientation angles of 65°, 55°, and 47°. The cementitious matrix was fabricated by cement and waste stone powder. After casting of all s les, flexural test was carried out on all specimens. Results showed that cementitious s le reinforced by 3D fabric with less spacer yarn orientation angle proposed the highest flexural strength among all s les (reinforced and unreinforced s les). Moreover, finite element method was used to predict the flexural behavior of textile reinforced concrete. Finite element method results showed good agreement with the experimental data. Consequently, the maximum spacer yarn stress derived by finite element analysis was used to calculate the efficiency reinforcement factor for all the textile reinforced concrete s les.
Publisher: Wiley
Date: 13-01-2020
Publisher: SAGE Publications
Date: 12-05-2017
Abstract: Finite element method can provide valuable results and information to evaluate and assess the mechanical behavior of tissue engineered scaffolds. In this investigation, a structurally and analytically based model is applied to analyze and to describe the mechanical properties of wire rope yarns as scaffold or other applications in textile engineering. In order to modeling the mechanical behavior of single yarn, non-linear hyperfoam model with three strain energy potential has been used. The results of finite element model are compared with an experimental approach and showed good agreement between software and experimental analysis with a maximum error at break of about 4.3%. As a result, validation of the finite element method is guaranteed for analysis of other structure of multi twisted yarn or wire ropes.
Location: Iran (Islamic Republic of)
No related grants have been discovered for Sayyed Behzad Abdellahi.