TY - JOUR T1 - ÇEVRİMSEL ÖN YÜKLEMENİN POLİPROPİLEN’İN GEVŞEME DAVRANIŞI ÜZERİNDEKİ ETKİSİ AU - Düşünceli, Necmi AU - Özensoy, Önder Çağdaş PY - 2021 DA - December DO - 10.17780/ksujes.1014509 JF - Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi JO - KSU J. Eng. Sci. PB - Kahramanmaraş Sütçü İmam Üniversitesi WT - DergiPark SN - 1309-1751 SP - 359 EP - 370 VL - 24 IS - 4 LA - tr AB - Bu çalışmada, oda sıcaklığında izotaktik polipropilen üzerinde yükleme-boşaltma ve yeniden yükleme sonrası yapılan gevşeme testlerine dair gözlemler rapor edilmiştir. Deneysel veriler, gevşeme testinin başlangıcında maksimum gerilme ve başlangıç gerilmesi arasındaki farkın artmasıyla birlikte gevşeme eğrilerinin şekillerinde belirgin değişiklikler olduğunu göstermiştir. Testin başlangıcında gerilme geleneksel gevşemeden farklı olarak önce artıp sonra monoton olarak azalmaktadır. Basit gevşemeden karma gevşemeye geçişte ön yüklemenin etkisini araştırmak için farklı çevrim sayısı ve gerilme seviyelerinde testler gerçekleştirilmiştir. KW - Izotaktik polipropilen KW - hasar birikimi KW - çevrimsel deformasyon KW - gevşeme. CR - Ariyama, T. (1993). Stress relaxation behavior after cyclic preloading in polypropylene. Polymer Engineering & Science, 33(22), 1494–1501. https://doi.org/10.1002/pen.760332209 CR - ASTM INTERNATIONAL. (2014). Astm D638-14. Annual Book of ASTM Standards. https://doi.org/10.1520/D0638-14.1 CR - Ayoub, G., Zaïri, F., Naït-Abdelaziz, M., & Gloaguen, J. M. (2010). Modelling large deformation behaviour under loading-unloading of semicrystalline polymers: Application to a high density polyethylene. International Journal of Plasticity, 26(3), 329–347. https://doi.org/10.1016/j.ijplas.2009.07.005 CR - Baral, P., Guillonneau, G., Kermouche, G., Bergheau, J. M., Loubet, J. L., Bennin, T., Ricci, J., Ediger, M. D., Bouvard, J. L., Francis, D. K., Tschopp, M. A., Marin, E. B., Bammann, D. J., Horstemeyer, M. F., Chen, K., Schweizer, K. S., Cifuentes, S. C., Frutos, E., Benavente, R., … Ullah, N. (2019). Effect of loading rate on the creep behaviour of epoxy resin insulators by nanoindentation. Macromolecules, 27(2), 11786–11797. https://doi.org/10.1007/s11029-012-9266-6 CR - Brusselle-Dupend, N., & Cangémi, L. (2008). A two-phase model for the mechanical behaviour of semicrystalline polymers. Part I: Large strains multiaxial validation on HDPE. Mechanics of Materials, 40(9), 743–760. https://doi.org/10.1016/j.mechmat.2008.03.011 CR - Caelers, H. J. M., Govaert, L. E., & Peters, G. W. M. (2016). The prediction of mechanical performance of isotactic polypropylene on the basis of processing conditions. Polymer, 83, 116–128. https://doi.org/10.1016/j.polymer.2015.12.001 CR - Detrez, F., Cantournet, S., & Seguela, R. (2011). Plasticity/damage coupling in semi-crystalline polymers prior to yielding: Micromechanisms and damage law identification. Polymer, 52(9). https://doi.org/10.1016/j.polymer.2011.03.012 CR - Dusunceli, N., Sanporean, C. G., Drozdov, A. D., de Claville Christiansen, J., & Comanici, F.-E. (2021). Mechanical and microstructural characterization of poly(N-isopropylacrylamide) hydrogels and its nanocomposites. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. https://doi.org/10.1177/1464420720988301 CR - Dusunceli, Necmi. (2012). The unusual creep and relaxation behaviour of polypropylene. Journal of Polymer Engineering, 32(3), 167–176. https://doi.org/10.1515/polyeng-2011-0159 CR - Dusunceli, Necmi, & Aydemir, B. (2011). The effects of loading history and manufacturing methods on the mechanical behavior of high-density polyethylene. Journal of Elastomers and Plastics, 43(5), 451–468. https://doi.org/10.1177/0095244311404181 CR - Dusunceli, Necmi, & Colak, O. U. (2006). High density polyethylene (HDPE): Experiments and modeling. Mechanics of Time-Dependent Materials. https://doi.org/10.1007/s11043-007-9026-5 CR - E328-02(08). (2013). Standard Test Methods for Stress Relaxation for Materials and Structures. ASTM Book of Standards, 02(Reapproved 2008). CR - Ghoreishy, M. H. R., & Abbassi Sourki, F. (2018). Development of a new combined numerical/experimental approach for the modeling of the nonlinear hyper-viscoelastic behavior of highly carbon black filled rubber compound. Polymer Testing, 70(May), 135–143. https://doi.org/10.1016/j.polymertesting.2018.06.035 CR - Gordeyev, S. A., & Ward, I. M. (1999). Time dependent recovery of oriented polyethylene. Journal of Materials Science, 34(19), 4767–4773. https://doi.org/10.1023/A:1004691206113 CR - Heymans, N., & Kitagawa, M. (2004). Modelling “unsual” behaviour after strain reversal with hierarchical fractional models. Rheologica Acta, 43(4), 383–389. https://doi.org/10.1007/s00397-003-0354-3 CR - Hiss, R., Hobeika, S., Lynn, C., & Strobl, G. (1999). Network stretching, slip processes, and fragmentation of crystallites during uniaxial drawing of polyethylene and related copolymers. A comparative study. Macromolecules, 32(13). https://doi.org/10.1021/ma981776b CR - Hong, K., Rastogi, A., & Strobl, G. (2004). A model treating tensile deformation of semicrystalline polymers: Quasi-static stress-strain relationship and viscous stress determined for a sample of polyethylene. Macromolecules, 37(26). https://doi.org/10.1021/ma049174h CR - Jourdan, C., Cavaille, J. Y., & Perez, J. (1989). Mechanical relaxations in polypropylene: A new experimental and theoretical approach. Journal of Polymer Science Part B: Polymer Physics, 27(11), 2361–2384. https://doi.org/10.1002/polb.1989.090271115 CR - Kästner, M., Obst, M., Brummund, J., Thielsch, K., & Ulbricht, V. (2012). Inelastic material behavior of polymers - Experimental characterization, formulation and implementation of a material model. Mechanics of Materials, 52. https://doi.org/10.1016/j.mechmat.2012.04.011 CR - Kitagawa, M., Zhou, D., & Qui, J. (1995). Stress‐Strain curves for solid polymers. Polymer Engineering & Science, 35(22), 1725–1732. https://doi.org/10.1002/pen.760352202 CR - Kitagawa, M., Zhou, D., Shimada, K., & Umeoka, H. (1999). Anomalous behavior associated with unloading in polyethylene. Zairyo/Journal of the Society of Materials Science, Japan, 48(6), 592–597. https://doi.org/10.2472/jsms.48.592 CR - Lipinski, B. M., Morris, L. S., Silberstein, M. N., & Coates, G. W. (2020). Isotactic Poly(propylene oxide): A Photodegradable Polymer with Strain Hardening Properties. Journal of the American Chemical Society, 142(14). https://doi.org/10.1021/jacs.0c01768 CR - Mourad, A. H. I., Fouad, H., & Elleithy, R. (2009). Impact of some environmental conditions on the tensile, creep-recovery, relaxation, melting and crystallinity behaviour of UHMWPE-GUR 410-medical grade. Materials and Design, 30(10), 4112–4119. https://doi.org/10.1016/j.matdes.2009.05.001 CR - Okereke, M. I., Buckley, C. P., & Siviour, C. R. (2012). Compression of polypropylene across a wide range of strain rates. Mechanics of Time-Dependent Materials, 16(4), 361–379. https://doi.org/10.1007/s11043-012-9167-z CR - Okereke, Michael I., & Akpoyomare, A. I. (2019). Two-process constitutive model for semicrystalline polymers across a wide range of strain rates. Polymer, 183, 121818. https://doi.org/10.1016/j.polymer.2019.121818 CR - Tauheed, F., & Sarangi, S. (2014). Damage-induced stress-softening and viscoelasticity of limited elastic materials. Mechanics of Time-Dependent Materials, 18(3), 493–525. https://doi.org/10.1007/s11043-014-9239-3 CR - Wang, F., & Weiss, R. A. (2018). Thermoresponsive Supramolecular Hydrogels with High Fracture Toughness. Macromolecules, 51(18), 7386–7395. https://doi.org/10.1021/acs.macromol.8b00490 CR - Zrida, M., Laurent, H., Rio, G., Pimbert, S., Grolleau, V., Masmoudi, N., & Bradai, C. (2009). Experimental and numerical study of polypropylene behavior using an hyper-visco-hysteresis constitutive law. Computational Materials Science, 45(2), 516–527. https://doi.org/10.1016/j.commatsci.2008.11.017 UR - https://doi.org/10.17780/ksujes.1014509 L1 - https://dergipark.org.tr/tr/download/article-file/2045425 ER -