0
research-article

Fiber diameter dependent elastic deformation in polymer composites – a numerical study

[+] Author and Article Information
Nitin Garg

charlottenstr. 33 BERLIN, BERLIN 12247 Germany enitingarg@gmail.com

Gurudutt Chandrashekar

One University Avenue Angola, IN 46703 chandrashekarg@trine.edu

Farid Alisafaei

University of Pennsylvania Department of Material Science and Engineering Philadelphia, PA 19104 alisafae@seas.upenn.edu

Chung-Souk Han

9824 Peters Ranch Way Elk Grove, CA 95757 chungsouk.han@gmail.com

1Corresponding author.

Contributed by the Materials Division of ASME for publication in the Journal of Engineering Materials and Technology. Manuscript received March 8, 2018; final manuscript received April 22, 2019; published online xx xx, xxxx. Assoc. Editor: Erdogan Madenci.

1Current address: Dr. G. Chandrashekar, Trine University, One University Avenue, Angola, IN 46703, USA. Email: chandrashekarg@trine.edu

2Current address: Dr. F. Alisafaei, Department of Material Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA. Email: alisafae@seas.upenn.edu

3Corresponding author, current address: Dr. C.-S. Han, 9824 Peters Ranch Way, Elk Grove, CA 94550, USA. Email: chungsouk.han@gmail.com

ASME doi:10.1115/1.4043766 History: Received March 08, 2018; Accepted April 24, 2019

Abstract

Micro-beam bending and nano-indentation experiments illustrate that length scale dependent elastic deformation can be significant in polymers at micron and submicron length scales. Such length scale effects in polymers should also affect the mechanical behavior of reinforced polymer composites, as particle sizes or diameters of fibers are typically in the micron range. Corresponding experiments on particle-reinforced polymer composites have shown increased stiffening with decreasing particle size at the same volume fraction. To examine a possible linkage between the size effects in neat polymers and polymer composites a numerical study is pursued here. Based on a couple stress elasticity theory, a finite element approach for plane strain problems is applied to predict the mechanical behavior of fiber-reinforced epoxy composite materials at micrometer length scale. Numerical results show significant changes in the stress fields and illustrate that with a constant fiber volume fraction the effective elastic modulus increases with decreasing fiber diameter. These results exhibit similar tendencies as in mechanical experiments of particle reinforced polymer composites.

Copyright © 2019 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In