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The use of finite element analysis in design courses and its effect in product development
(IEEE Xplore, 2021-12) Munoz Guzman, Angel Daniel; Kaneko Gutiérrez, Hiromi Angélica; Jiménez Ramírez, Daniel; https://ror.org/03ayjn504
Computer-aided analysis and design tools have become essential to the modern design environment, and some parts of engineering curricula must be included in this field. Regarding the selection of materials, some engineering careers (programs) study their functional behavior primarily by using software and finite element analysis (FEA), a numerical method for obtaining approximate solutions for boundary value problems. Its teaching is quite demanding and challenging. FEA, by its nature, requires an excellent knowledge of elasticity theory, matrix algebra, mechanics, and computer programming skills to various degrees. This investigation intends to fill the gap between engineering and design in FEA education and show the impact of implementing FEA on the designer's mind and the outcomes in product development as part of the course “Materials Selection for Designers.” At the end of the study, the design students learned to correctly perform and interpret a basic FEA simulation, taking the interpretation beyond the engineering objectives (i.e., knowing the material's behavior and limits) to consider applications of this knowledge that would positively impact the economy, ecology, and aesthetics.
Study on the properties of a polymer system based on poly (ethylene glycol), n-isopropyl acrylamide and chitosan for controlled drug delivery
(Springer, 2020-08-29) Munoz Guzman, Angel Daniel; Rabelero, Martin; Alvarado Mendoza, Abraham Gabriel; https://ror.org/03ayjn504; https://ror.org/043xj7k26
Structured hydrogels with thermo-sensitivity properties to be used as a novel carrier for controlled drug delivery were prepared here. These hydrogels were formed by core-shell particles, where the core is a semi-interpenetrated polymer network (semi-IPN) made of n-isopropylacrylamide (NIPAAm) and poly (ethylene glycol) (PEG), and a chitosan shell. All polymers were synthesized by using semi-continuous heterophase polymerization at different dosing rates to study their effect on particle size, system stability and drug deliver efficiency. Structural (FTIR, particle size, SEM) and functional analysis were performed (stability and drug delivery). FTIR confirmed the polymerization by showing the development of interactions between the characteristic functional groups from the polymers. SEM micrographs from hydrogels revealed a porous structure, which is affected by the dosing rate during the polymerization process as well as the particle size which affect the stability of the obtained latex. Drug release analysis of the hydrogels was performed into distilled water and in a buffer at different temperatures. Results shown that most of the characteristics of this polymer system can be controlled, and so tuning the controlled release behaviour, these findings made these hydrogels an important contender for controlled drug delivery.

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