پیوندهای مفید
آمار
| تعداد نشریات | 9 |
| تعداد شمارهها | 446 |
| تعداد مقالات | 5,719 |
| تعداد مشاهده مقاله | 8,018,425 |
| تعداد دریافت فایل اصل مقاله | 6,527,278 |
بررسی رفتار هیدروژلهای حساس به دما با در نظر گرفتن خواص تابعی هدفمند | ||
| نشریه مهندسی مکانیک امیرکبیر | ||
| مقاله 17، دوره 52، شماره 12، اسفند 1399، صفحه 3583-3594 اصل مقاله (2.85 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/mej.2019.16172.6294 | ||
| نویسندگان | ||
| محمد شجاعیفرد1؛ مصطفی باغانی* 2 | ||
| 1مهندسی مکانیک-طراحی کاربردی، دانشگاه تهران، تهران، ایران | ||
| 2دانشگاه تهران-مهندسی مکانیک | ||
| چکیده | ||
| هیدروژل ها شبکه ى پلیمرى ٣ بعدى هستند که به اعمال تحریک هاى خارجی به شدت پاسخ داده و متورم می شوند. جهت مطالعه رفتار مکانیکی این مواد حین تغییردما، یک تابع انرژى کرنشی متشکل از دو بخش انرژى کشیدگی شبکه و انرژى ترکیب درنظر گرفته شده است. با توجه به تغییر مشخصات هیدروژل هاى تابعی-هدفمند حساس به دما درراستاى ضخامت، حل نیمه تحلیلی براى خمش این مواد درشرایط کرنش- صفحه اى ارائه گردیده است. جهت صحت سنجی روش نیمه تحلیلی ارائه شده، از روش اجزاء محدود در نرم افزار آباکوس با نوشتن زیربرنامه یوهایپر براى مدل ساختارى این مواد استفاده شده است. پس از صحت سنجی کد یوهایپر در مسئله تورم آزاد ، چند مسئله با شرایط مختلف بوسیله ى این دو روش مورد مقایسه قرار گرفتند؛ که مطابقت نتایج شعاع، تنش شعاعی و تنش مماسی حاصل از خمش تیر در این دو روش، دقت بالاى روش نیمه تحلیلی ارائه شده را نشان می دهند. درنهایت با تغییر دما در بازه ٠٢٣ تا ٨٨٢ کلوین، میزان تغییرات دو فاکتور میزان زاویه خمیدگی و انحنا، که اهمیت بالایی در ساخت سنسورها و عملگرها دارند، را مورد مطالعه قرار داده ایم. پیوستگی تنش هاى شعاعی و مماسی در هیدروژل هاى داراى خواص تابعی هدفمند، نسبت به ساختارهاى چندلایه اى، منجر به کاربردهاى گسترده این مواد می شود. | ||
| کلیدواژهها | ||
| هیدروژل حساس به دما؛ مواد تابعی هدفمند؛ حل نیمهتحلیلی؛ مدلسازی اجزاءمحدود | ||
| عنوان مقاله [English] | ||
| Mechanical Behavior of Temperature-Sensitive Hydrogel Considering Functionally Graded Characteristics | ||
| نویسندگان [English] | ||
| Mohammad Shojaeifard1؛ Mostafa Baghani2 | ||
| 1School of Mechanical Engineering, College of Engineering, University of Tehran, Iran | ||
| 2دانشگاه تهران-مهندسی مکانیک | ||
| چکیده [English] | ||
| Hydrogels are 3 dimensional polymeric networks containing cross-linked chains which respond severely to the exterior stimuli and absorb a great amount of solution and swell. The functionally graded temperature-sensitive hydrogel is one of the most applicable materials to be used in the industry. Thus, to study the mechanical behavior of these materials, an energy density function is introduced which includes network stretch energy and mixing part. Considering the properties variation along the thickness direction, bending of functionally graded temperature-sensitive hydrogels is solved analytically under plane strain assumption. Verifying the presented analytical procedure, the results of this approach is compared with the outcomes of finite element method. To solve diverse problems by finite element method, UHYPER subroutine has been verified in the free-swelling problem. Next, the radius and stresses are studied by both methods for functionally graded temperature-sensitive hydrogels. Finally, according to the importance of factors such as semi-angle and bending curvature in industrial designs, these factors are investigated by changing the temperature in a range of 320 to 288 Kelvin. The continuity of the radial and tangential stresses field is the other reason for utilizing functionally graded hydrogels, while the multi-layer hydrogels do not have continuous stress fields. | ||
| کلیدواژهها [English] | ||
| Temperature sensitive hydrogels, Functionally graded materials, Semi-analytical solution, Finite element modeling | ||
| مراجع | ||
|
[1] S. Cai, Z. Suo, Mechanics and chemical thermodynamics of phase transition in temperature-sensitive hydrogels, Journal of the Mechanics Physics of Solids, 59(11) (2011) 2259-2278. [2] S.A. Chester, L. Anand, A thermo-mechanically coupled elastomeric materials: application to thermally responsive gels, Journal of the Mechanics Physics of Solids 59(10) (2011) 1978-2006. [3] W. Guo, M. Li, J. Zhou, Modeling programmable deformation of self-folding allpolymer structures with temperature-sensitive hydrogels, Smart Materials Structures, 22(11) (2013) 115028. [4] H. Mazaheri, M. Baghani, R. Naghdabadi, S. Sohrabpour, Inhomogeneous swelling behavior of temperature sensitive PNIPAM hydrogels in micro-valves: analytical and numerical study, Smart Materials Structures, 24(4) (2015) 045004. [5] H. Mazaheri, M. Baghani, R. Naghdabadi, S. Sohrabpour, Coupling behavior of the pH/temperature sensitive hydrogels for the inhomogeneous and homogeneous swelling, Smart Materials Structures, 25(8) (2016) 085034. [6] H. Mazaheri, M. Baghani, R. Naghdabadi, Inhomogeneous and homogeneous swelling behavior of temperature-sensitive poly-(Nisopropylacrylamide) hydrogels, Journal of Intelligent Material Systems Structures, 27(3) (2016) 324-336. [7] T. Morimoto, F. Ashida, Temperature-responsive bending of a bilayer gel, International Journal of Solids Structures, 56 (2015) 20-28. [8] R. Marcombe, S. Cai, W. Hong, X. Zhao, Y. Lapusta, Z. Suo, A theory of constrained swelling of a pH-sensitive hydrogel, Soft Matter, 6(4) (2010) 784-793. [9] W. Toh, T.Y. Ng, J. Hu, Z. Liu, Mechanics of inhomogeneous large deformation of photo[1]thermal sensitive hydrogels, International Journal of Solids Structures, 51(25-26) (2014) 4440-4451. [10] H. Li, R. Luo, Modeling the influence of initial geometry on the equilibrium responses of glucose-sensitive hydrogel, Journal of Intelligent Material Systems Structures, 22(8) (2011) 715-722. [11] S.A. Chester, L. Anand, A coupled theory of fluid permeation and large deformations for elastomeric materials, Journal of the Mechanics Physics of Solids, 58(11) (2010) 1879-1906. [12] M. Doi, Gel dynamics, Journal of the Physical Society of Japan, 78(5) (2009) 052001. [13] M. Guenther, G. Gerlach, T. Wallmersperger, Non-linear effects in hydrogel-based chemical sensors: experiment and modeling, Journal of Intelligent Material Systems Structures, 20(8) (2009) 949-961. [14] L. Ionov, Biomimetic hydrogel-based actuating systems, Advanced Functional Materials, 23(36) (2013) 4555-4570. [15] A. Richter, Hydrogels for actuators, in: Hydrogel sensors and actuators, Springer, Berlin, Heidelberg, 2009, pp. 221-248. [16 J.P. Chávez, A. Voigt, J. Schreiter, U. Marschner, S. Siegmund, A. Richter, A new self-excited chemo-fluidic oscillator based on stimuli-responsive hydrogels: mathematical modeling and dynamic behavior, Applied Mathematical Modelling, 40(23-24) (2016) 9719-9738. [17] A.S. Hoffman, Hydrogels for biomedical applications, Advanced drug delivery reviews, 64 (2012) 18-23. [18] M. Sharabi, D. Varssano, R. Eliasy, Y. Benayahu, D. Benayahu, R. Haj-Ali, Mechanical flexure behavior of bio-inspired collagen-reinforced thin composites, Composite Structures, 153 (2016) 392-400. [19] X. Zeng, C. Li, D. Zhu, H.J. Cho, H. Jiang, Tunable microlens arrays actuated by various thermo-responsive hydrogel structures, Journal of Micromechanics Microengineering, 20(11) (2010) 115035. [20] J. Guan, H. He, D.J. Hansford, L.J. Lee, Self-folding of three-dimensional hydrogel microstructures, The Journal of Physical Chemistry B, 109(49) (2005) 23134-23137. [21] M. Baghani, R. Naghdabadi, J. Arghavani, coupled theory for fluid permeation in elastomeric, A large deformation framework for shape memory polymers: Constitutive modeling and finite element implementation, journal of intelligent Material systems structures 24(1) (2013) 21-32. [22] A. Nassiri-monfared, M. Baghani, M.R. Zakerzadeh, P. Fahimi, Developing a semianalytical model for thermomechanical response of SMA laminated beams, considering SMA asymmetric behavior, Meccanica, 53(4- 5) (2018) 957-971. [23] Z. Hu, X. Zhang, Y. Li, Synthesis and application of modulated polymer gels, Science, 1995. [24] J. Abdolahi, M. Baghani, N. Arbabi, H. Mazaheri, Analytical and numerical analysis of swelling-induced large bending of thermallyactivated hydrogel bilayers, International Journal of Solids Structures, 99 (2016) 1-11. [25] J. Abdolahi, M. Baghani, N. Arbabi, H. Mazaheri, Finite bending of a temperaturesensitive hydrogel tri-layer: An analytical and finite element analysis, Composite Structures ,164 (2017) 219-228. [26] M. Guvendiren, J.A. Burdick, S. Yang, Kinetic study of swelling-induced surface pattern formation and ordering in hydrogel films with depth-wise crosslinking gradient, Soft Matter, 6(9) (2010) 2044-2049. [27] M. Guvendiren, J.A. Burdick, S. Yang, Solvent induced transition from wrinkles to creases in thin film gels with depth-wise crosslinking gradients, Soft Matter, 6(22) (2010) 5795- 5801. [28] M. Guvendiren, S. Yang, J.A. Burdick, Swelling-induced surface patterns in hydrogels with gradient crosslinking density, Advanced Functional Materials, 19(19) (2009) 3038- 3045. [29] Z. Wu, N. Bouklas, R. Huang, Swell-induced surface instability of hydrogel layers with material properties varying in thickness direction, International Journal of Solids Structures, 50(3-4) (2013) 578-587. [30] Z. Wu, N. Bouklas, Y. Liu, R. Huang, Onset of swell-induced surface instability of hydrogel layers with depth-wise graded material properties, Mechanics of Materials, 105 (2017) 138-147. [31] Z. Wu, R. Huang, Analytical solution of swellinduced surface instability for graded hydrogel layers, in: ICF13. [32] S. Roccabianca, M. Gei, D. Bigoni, Plane strain bifurcations of elastic layered structures subject to finite bending: theory versus experiments, IMA journal of applied mathematics, 75(4) (2010) 525-548. [33] F. Afroze, E. Nies, H. Berghmans, Phase transitions in the system poly (N-isopropylacrylamide)/water and swelling behaviour of the corresponding networks, Journal of Molecular Structure, 554(1) (2000) 55-68. [34] J. Kierzenka, L.F. Shampine, A BVP solver that controls residual and error, Journal of Numerical Analysis, Industrial and Applied Mathematics, 3(1-2) (2008) 27-41. | ||
|
آمار تعداد مشاهده مقاله: 1,147 تعداد دریافت فایل اصل مقاله: 1,408 |
||