عنوان
پدید آورنده
موضوع
رده
کتابخانه
محل استقرار
شماره کتابشناسی ملی
شماره
TL49585
زبان اثر
زبان متن نوشتاري يا گفتاري و مانند آن
انگلیسی
عنوان و نام پديدآور
عنوان اصلي
Multi-Scale Modeling of Mechanical Properties of Single Wall Carbon Nanotube (SWCNT) Networks
نام عام مواد
[Thesis]
نام نخستين پديدآور
Ankit Gupta
نام ساير پديدآوران
Holm, Elizabeth A.
وضعیت نشر و پخش و غیره
نام ناشر، پخش کننده و غيره
Carnegie Mellon University
تاریخ نشرو بخش و غیره
2017
مشخصات ظاهری
نام خاص و کميت اثر
195
يادداشت کلی
متن يادداشت
Committee members: Bielak, Jacobo; Dayal, Kaushik; Holm, Elizabeth A.; Islam, Mohammad F.; Rollett, Anthony
یادداشتهای مربوط به نشر، بخش و غیره
متن يادداشت
Place of publication: United States, Ann Arbor; ISBN=978-0-355-22927-1
یادداشتهای مربوط به پایان نامه ها
جزئيات پايان نامه و نوع درجه آن
Ph.D.
نظم درجات
Materials Science and Engineering
کسي که مدرک را اعطا کرده
Carnegie Mellon University
امتياز متن
2017
یادداشتهای مربوط به خلاصه یا چکیده
متن يادداشت
Single wall carbon nanotubes (SWCNTs) show a variety of unparalleled properties such as high electrical and thermal conductivity, high specific surface area (SSA) and a large stiffness under axial loads. One of the major challenges in tapping the vast potential of SWCNTs is to fabricate nanotube based macrostructures that retain the unique properties of nanotubes. Pristine SWCNT aerogels are highly porous, isotropic structures of nanotubes mediated via van der Waals (VDW) interactions at junctions. The mechanical behavior of such aerogels is examined in several experimental studies. However, it is necessary to supplement these studies with insights from simulations in order to develop a fundamental understanding of deformation behavior of SWCNT aerogels. In this study, the mechanical behavior of SWCNT networks is studied using a multi-scale modeling approach. The mechanics of an individual nanotube and interactions between few nanotubes are modeled using molecular dynamics (MD) simulations. The results from atomistic simulations are used to inform meso-scale and continuum scale finite element (FE) models. The deformation mechanism of pristine SWCNT networks under large compressive strain is deduced from insights offered by meso-scale simulations. It is found that the elasticity of such networks is governed by the bending deformation of nanotubes while the plastic deformation is governed by the VDW interactions between nanotubes. The stress response of the material in the elastic regime is dictated by the VDW stresses on nanotubes while in the plastic regime, both the VDW and axial deformation stresses on nanotubes drive the overall stress response. In this study, the elastic behavior of a random SWCNT network with any set of junction stiffness and network density is also investigated using FE simulations. It is found that the elastic deformation of such networks can be governed either by the deformation of the nanotubes (bending, axial compression) or deformation of the junctions. The junction stiffness and the network density determine the network deformation mode. The results of the FE study are also applicable to any stiff fiber network.
موضوع (اسم عام یاعبارت اسمی عام)
موضوع مستند نشده
Materials science
اصطلاحهای موضوعی کنترل نشده
اصطلاح موضوعی
Applied sciences;Carbon nanotubes network;Coarse grained MD;Finite element;Molecular dynamics;Multi scale modeling;Porous material
نام شخص به منزله سر شناسه - (مسئولیت معنوی درجه اول )
مستند نام اشخاص تاييد نشده
Shareefi, Adnan Osama
نام شخص - ( مسئولیت معنوی درجه دوم )
مستند نام اشخاص تاييد نشده
Holm, Elizabeth A.
شناسه افزوده (تنالگان)
تقسيم فرعي
Materials Science and Engineering
مستند نام تنالگان تاييد نشده
Carnegie Mellon University
شماره دستیابی
شماره بازیابی
1957372042; 10622833
دسترسی و محل الکترونیکی
نام الکترونيکي
مطالعه متن کتاب وضعیت انتشار
فرمت انتشار
p
اطلاعات رکورد کتابشناسی
نوع ماده
[Thesis]
کد کاربرگه
276903
اطلاعات دسترسی رکورد
سطح دسترسي
a
تكميل شده
Y
