investigation of crack resistance in single walled carbon nanotube reinforced polymer composites based on fem

نویسندگان

hosein hemmatian

a. fereidoon

m. rajabpour

چکیده

carbon nanotube (cnt) is considered as a new generation of material possessing superior mechanical, thermal and electrical properties. the applications of cnt, especially in composite materials, i.e. carbon nanotube reinforced polymer have received great attention and interest in recent years. to characterize the influence of cnt on the stress intensity factor of nanocomposites, three fracture modes (opening, shearing and tearing) are considered. the stress intensity factor of nanocomposites is evaluated using a representative volume element (rve) based on the continuum mechanics and finite element method (fem). inter-atomic interactions of cnt are simulated by beam elements in the finite element (fe) model. non-linear springbased line elements are employed to simulate the van der waals (vdw) bonds. in all fracture modes, the stress intensity factor was determined for pure matrix and matrix reinforced with single-walled carbon nanotube (swcnt). numerical results indicate that the load carrying capacities of the cnts in a matrix are evident. addition of cnts in a matrix can increase the stiffness of the composite. finally, the results showed that utilizing of swcnt decreased the stress intensity factor and improved crack resistance.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Investigation of Crack Resistance in Single Walled Carbon Nanotube Reinforced Polymer Composites Based on FEM

Carbon nanotube (CNT) is considered as a new generation of material possessing superior mechanical, thermal and electrical properties. The applications of CNT, especially in composite materials, i.e. carbon nanotube reinforced polymer have received great attention and interest in recent years. To characterize the influence of CNT on the stress intensity factor of nanocomposites, three fracture ...

متن کامل

Effects of Nanotube/Matrix Interface on Multi-Walled Carbon Nanotube Reinforced Polymer Mechanical Properties

In this paper, experimental and Finite Element Methods have been used to determine mechanical properties of nanocomposites. Standard tensile and compression samples with 0.0, 0.15, 0.25, 0.35, 0.45, and 0.55 weight fraction of Multi-Walled Carbon Nanotube (MWCNT) were prepared and tested. Nanotube weight fraction was varied to investigate the effects of nanotube weight fraction on nanocomposite...

متن کامل

Thermal Property of Multi-Walled-Carbon-Nanotube Reinforced Epoxy Composites

In this study, epoxy composite specimens reinforced with multi-walled carbon nanotube filler were fabricated using shear mixer and ultra-sonication processor. The mechanical and thermal properties of the fabricated specimens were measured and evaluated. From the electron microscope images and the results from the measurements of tensile strengths, the specimens having 0.6 wt% nanotube content s...

متن کامل

Multiscale modeling of carbon nanotube reinforced polymer composites.

This article examines the effect of interfacial load transfer on the stress distribution in carbon nanotube/polymer composites through a stress analysis of the nanotube/matrix system. Both isostrain and isostress loading conditions are investigated. The nanotube is modeled by the molecular structural mechanics method at the atomistic level. The matrix is modeled by the finite element method, an...

متن کامل

Carbon Nanotube Polymer Composites

Figure2 While there are limitless applications for these materials, we are interested in radiation shielding and radiation resistant materials for use in the space industry. Initially, we focused on optically transparent single wall nanotoube (SWNT) polymer composites (2-5). Three different in situ polymerization/sonication methods, heat, light and gamma radiation, were used to produce poly (me...

متن کامل

Electronic properties of conjugated polyelectrolyte/single-walled carbon nanotube composites.

Two narrow-bandgap conjugated polyelectrolytes (CPEs) of identical backbone structure but different pendant charges are used to disperse single-walled carbon nanotubes (SWNTs) in MeOH. Films of the resulting CPE:SWNT composites have electrical conductivity dependent on the SWNT loading, which can be increased with acid vapor treatment. The anionic CPE gives higher electrical conductivity for th...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
journal of ultrafine grained and nanostructured materials

ناشر: university of tehran college of engineering

ISSN 2423-6845

دوره 45

شماره 1 2012

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023