Capturing tensile size-dependency in polymer nanofiber elasticity

doi:10.1016/j.jmbbm.2014.11.003

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	Capturing tensile size-dependency in polymer nanofiber elasticity
	Yuan, Bo ; Wang, Jun ; Han, Ray P. S.
刊名	journal of the mechanical behavior of biomedical materials
	2015
关键词	Tensile size-dependency Higher-order strain gradient elasticity Characteristic length-scale parameter Effective modulus STRAIN GRADIENT PLASTICITY THIN-FILMS MECHANICS DEFORMATION NANOTUBES MODULUS SURFACE
DOI	10.1016/j.jmbbm.2014.11.003
英文摘要	As the name implies, tensile size-dependency refers to the size-dependent response under uniaxial tension. It defers markedly from bending size-dependency in terms of onset and magnitude of the size-dependent response; the former begins earlier but rises to a smaller value than the latter. Experimentally, tensile size-dependent behavior is much harder to capture than its bending counterpart. This is also true in the computational effort; bending size-dependency models are more prevalent and well-developed. Indeed, many have questioned the existence of tensile size-dependency. However, recent experiments seem to support the existence of this phenomenon. Current strain gradient elasticity theories can accurately predict bending size-dependency but are unable to track tensile size-dependency. To rectify this deficiency a higher-order strain gradient elasticity model is constructed by including the second gradient of the strain into the deformation energy. Tensile experiments involving 10 wt% polycaprolactone nanofibers are performed to calibrate and verify our model. The results reveal that for the selected nanofibers, their size-dependency begins when their diameters reduce to 600 nm and below. Further, their characteristic length-scale parameter is found to be 1095.8 nm. (C) 2014 Elsevier Ltd. All rights reserved.; Engineering, Biomedical; Materials Science, Biomaterials; SCI(E); EI; PubMed; 0; ARTICLE; jun_wang@fudan.edu.cn; ray-han@pku.edu.cn; 26-31; 42
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/188776]
专题	工学院
推荐引用方式 GB/T 7714	Yuan, Bo,Wang, Jun,Han, Ray P. S.. Capturing tensile size-dependency in polymer nanofiber elasticity[J]. journal of the mechanical behavior of biomedical materials,2015.
APA	Yuan, Bo,Wang, Jun,&Han, Ray P. S..(2015).Capturing tensile size-dependency in polymer nanofiber elasticity.journal of the mechanical behavior of biomedical materials.
MLA	Yuan, Bo,et al."Capturing tensile size-dependency in polymer nanofiber elasticity".journal of the mechanical behavior of biomedical materials (2015).