Nanoscale Structural and Mechanical Characterization of Nanowire-Reinforced Polymer Composites

Volume 11: Nano and Micro Materials, Devices and Systems; Microsystems Integration ◽

10.1115/imece2011-64083 ◽

2011 ◽

Author(s):

Wyatt Leininger ◽

Xinnan Wang ◽

X. W. Tangpong ◽

Marshall McNea

Keyword(s):

Elastic Modulus ◽

Tensile Testing ◽

Mechanical Characterization ◽

Tensile Load ◽

Small Strain ◽

Epoxy Composites ◽

Atomic Force ◽

Reinforced Polymer ◽

Multi Walled Carbon Nanotube

In this study, the mechanical properties of multi-walled carbon nanotube (MWCNT) reinforced epoxy composites were characterized using an in-house designed micro/nano tensile load stage in conjunction with an atomic force microscope (AFM). The surface of the nanocomposite was scanned by the AFM during intermittent tensile testing. Micro/nano deformation was observed, and the reinforcing mechanisms were discussed in conjunction with architecture and elastic modulus. Results show that the MWCNT reinforced nanocomposite has an increased elastic modulus. The Halpin-Tsai and Hui-Shia models were compared to the experimental results, and the Halpin-Tsai was found to correlate when only the load bearing outer layer of the MWCNTs were considered. Additionally, it is concluded that the combination of the load stage and AFM is capable of capturing insitu deformation progress for small strain increments.

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Nanoscale Structural and Mechanical Characterization of MWCNT-Reinforced Polymer Composites

Journal of Engineering Materials and Technology ◽

10.1115/1.4005919 ◽

2012 ◽

Vol 134 (2) ◽

Cited By ~ 4

Author(s):

Wyatt Leininger ◽

Xinnan Wang ◽

X. W. Tangpong ◽

Marshall McNea

Keyword(s):

Elastic Modulus ◽

Tensile Load ◽

Small Strain ◽

Experimental Result ◽

Multiwalled Carbon ◽

Atomic Force ◽

Reinforced Polymer ◽

In Situ Deformation

In this study, the elastic modulus of 1 wt. % multiwalled carbon nanotube (MWCNT) reinforced epoxy composite was characterized using an in-house designed micro/nano tensile load stage in conjunction with an atomic force microscope (AFM). The surface of the nanocomposite was scanned by the AFM during intermittent tensile testing, and micro/nanoscale deformation was observed. The MWCNT reinforced nanocomposite exhibited a 23% increase in the measured elastic modulus compared with the pure epoxy. The elastic moduli of the nanocomposite were also predicted by the Halpin–Tsai and Hui–Shia models, and the former offered a better correlation with the experimental result when only the load bearing outer layer of the MWCNTs was considered. The combination of the load stage and AFM is capable of capturing the in situ deformation progress for small strain increments.

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Mechanical Characterization of Carbon Fibre Reinforced Polymer Embedded with Shape Memory Alloy Wires

SSRN Electronic Journal ◽

10.2139/ssrn.3642552 ◽

2020 ◽

Author(s):

Sivaacharan Muralidharan ◽

Santhosh Kumar Sundareswaran ◽

Balaji Rajendran

Keyword(s):

Shape Memory Alloy ◽

Carbon Fibre ◽

Shape Memory ◽

Mechanical Characterization ◽

Reinforced Polymer ◽

Carbon Fibre Reinforced Polymer ◽

Fibre Reinforced Polymer

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Thermo-mechanical characterization of nonwoven fabric reinforced polymer composites

Materials Today Proceedings ◽

10.1016/j.matpr.2020.10.972 ◽

2020 ◽

Author(s):

Sachin Tejyan ◽

Divyesh Sharma ◽

Brijesh Gangil ◽

Amar Patnaik ◽

Tej Singh

Keyword(s):

Polymer Composites ◽

Mechanical Characterization ◽

Nonwoven Fabric ◽

Reinforced Polymer

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A Universal Model for the Log-Normal Distribution of Elasticity in Polymeric Gels and Its Relevance to Mechanical Signature of Biological Tissues

Biology ◽

10.3390/biology10010064 ◽

2021 ◽

Vol 10 (1) ◽

pp. 64

Author(s):

Arnaud Millet

Keyword(s):

Elastic Modulus ◽

Normal Distribution ◽

Biological Tissues ◽

Force Microscopy ◽

Polymeric Gels ◽

Atomic Force ◽

Clear Explanation ◽

Log Normal ◽

Log Normal Distribution

The mechanosensitivity of cells has recently been identified as a process that could greatly influence a cell’s fate. To understand the interaction between cells and their surrounding extracellular matrix, the characterization of the mechanical properties of natural polymeric gels is needed. Atomic force microscopy (AFM) is one of the leading tools used to characterize mechanically biological tissues. It appears that the elasticity (elastic modulus) values obtained by AFM presents a log-normal distribution. Despite its ubiquity, the log-normal distribution concerning the elastic modulus of biological tissues does not have a clear explanation. In this paper, we propose a physical mechanism based on the weak universality of critical exponents in the percolation process leading to gelation. Following this, we discuss the relevance of this model for mechanical signatures of biological tissues.

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