TY - JOUR ID - 78638 TI - Kinetics of swelling of cylindrical functionally graded temperature-responsive hydrogels JO - Journal of Computational Applied Mechanics JA - JCAMECH LA - en SN - 2423-6713 AU - namdar, amir hossein AD - Department of mechanical engineering, Sharif university of technology, Tehran, Iran. Y1 - 2020 PY - 2020 VL - 51 IS - 2 SP - 464 EP - 471 KW - Temperature-responsive hydrogel KW - Kinetics of swelling KW - analytical study KW - micro-mixer DO - 10.22059/jcamech.2020.305848.528 N2 - Cylindrical hydrogels have a wide variety of applications in microfluidics; for example, they serve as micro-valves, micro-mixers, and micro-lenses. The main advantages of them can be mentioned as their autonomous functionality due to their responses to environmental stimuli and simple geometry. Furthermore, functionally graded hydrogels have recently found applications in hydrogel actuators. Therefore, in this work, the kinetics of swelling, shrinking, and force generation of cylindrical functionally graded temperature-responsive hydrogels are investigated. Kinetics of cylindrical structure is investigated analytically by developing a mathematical model based on available constitutive models of large deformation of hydrogels. The cross-link density of the hydrogel polymeric network varies along the radius of the cylinder linearly. In order to analyze the structure's behavior, the temperature is changed, and the response time of the structures with different distribution of cross-link density is investigated. In addition, to investigate the realistic actuators' performance, the cylindrical hydrogel is located inside a hollow cylinder, and the pressure of the hydrogel, which puts on the cylinder, is investigated. The results show that manipulation of cross-link density influences the response time of the cylindrical hydrogel; hence, it is a useful tool to manage the overall performance of cylindrical actuators. UR - https://jcamech.ut.ac.ir/article_78638.html L1 - https://jcamech.ut.ac.ir/article_78638_186e78e6afb24db5a9e398f4b9f30485.pdf ER -