Ahmadova, Arzu Numerical Modelling of porosity generation, movement, and compaction during the RTM process. Masters Thesis University of Stuttgart, 2018. Abstract | Links | BibTeX @mastersthesis{Ahmadova2018,
title = {Numerical Modelling of porosity generation, movement, and compaction during the RTM process.},
author = {Arzu Ahmadova},
url = {https://www.researchgate.net/publication/331330329_Numerical_Modelling_of_porosity_generation_movement_and_compaction_during_the_RTM_processundefined},
year = {2018},
date = {2018-09-26},
school = {University of Stuttgart},
abstract = {The Liquid Composite Molding (LCM) process is an affective composites manufacturing method,due to the high quality production of parts at relatively low cost, particularly in the aerospace and automotive industries. One of the most widespread approaches is the resin transfer molding (RTM) process which impregnates dry fiber preforms placed in a sealed rigid tooling under moderate infusion pressures. An experimental analyses of the process related to air entrapment mechanisms via permeability modification, capillary effect and sensors, which is the most problematic defectivenessaffecting on high quality composite materials is performed. Different types of methods such as LCM and RTMare investigated to study the presence, formation and generation of porosity in the final part by relating the content of macro/micro-voids to the capillary number. An analytical solution of consolidation analyses it is presented to show the infusion time needed to consolidate an RVE glass fibre bundle. Finite element analyses showed that the infusion time of circular RVE model and the true elliptical bundle impregnation was more or less the same, thereby validating the RVE model. Some numerical analyses of voids transport mechanisms was carried out with and without the presence of vacuum. From an experimental point of view porosity movement and generation have been investigated during the resin transfer molding process. It has been found that significantly greater bubbles are formed at the flow front in the case that vacuum is not applied at the outlet. Measurements of porosity distribution have been obtained from specimens ‘burn off’ tests.
(15) (PDF) Numerical Modelling of porosity generation, movement, and compaction during the RTM process.. Available from: https://www.researchgate.net/publication/331330329_Numerical_Modelling_of_porosity_generation_movement_and_compaction_during_the_RTM_process [accessed May 13 2021].},
keywords = {},
pubstate = {published},
tppubtype = {mastersthesis}
}
The Liquid Composite Molding (LCM) process is an affective composites manufacturing method,due to the high quality production of parts at relatively low cost, particularly in the aerospace and automotive industries. One of the most widespread approaches is the resin transfer molding (RTM) process which impregnates dry fiber preforms placed in a sealed rigid tooling under moderate infusion pressures. An experimental analyses of the process related to air entrapment mechanisms via permeability modification, capillary effect and sensors, which is the most problematic defectivenessaffecting on high quality composite materials is performed. Different types of methods such as LCM and RTMare investigated to study the presence, formation and generation of porosity in the final part by relating the content of macro/micro-voids to the capillary number. An analytical solution of consolidation analyses it is presented to show the infusion time needed to consolidate an RVE glass fibre bundle. Finite element analyses showed that the infusion time of circular RVE model and the true elliptical bundle impregnation was more or less the same, thereby validating the RVE model. Some numerical analyses of voids transport mechanisms was carried out with and without the presence of vacuum. From an experimental point of view porosity movement and generation have been investigated during the resin transfer molding process. It has been found that significantly greater bubbles are formed at the flow front in the case that vacuum is not applied at the outlet. Measurements of porosity distribution have been obtained from specimens ‘burn off’ tests.
(15) (PDF) Numerical Modelling of porosity generation, movement, and compaction during the RTM process.. Available from: https://www.researchgate.net/publication/331330329_Numerical_Modelling_of_porosity_generation_movement_and_compaction_during_the_RTM_process [accessed May 13 2021]. |
