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碳纳米管增强纳米复合材料的先进纳米压痕模拟

Advanced nanoindentation simulations for carbon nanotube reinforced nanocomposites.

作者信息

Ahmed Khondaker Sakil, Ibrahim Ibriju, Keng Ang Kok

机构信息

Department of Civil Engineering, Military Institute of Science and Technology, Dhaka, 1216, Bangladesh.

Department of Civil and Environmental Engineering, National University of Singapore, 1, Engineering Drive 2, 117576, Singapore.

出版信息

Heliyon. 2020 Aug 4;6(8):e04575. doi: 10.1016/j.heliyon.2020.e04575. eCollection 2020 Aug.

DOI:10.1016/j.heliyon.2020.e04575
PMID:32775747
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7404541/
Abstract

Mechanical properties of Carbon Nanotube (CNT) reinforced composites are obtained utilizing finite element (FE) method-based indentation simulations considering large strain elasto-plastic behavior of elements. This study includes nanoindentation simulations for chemically non-bonded CNT/matrix interface, including the length scale effect of nanocomposites. In order to investigate the mechanical properties of CNT reinforced nanocomposites, a number of FE models for nanoindentation tests have been simulated. Sample nanocomposites are examined to determine the suitable types of CNTs and their effectiveness as a reinforcement of different potential matrices. The Parametric study is conducted to obtain the influence of wall thickness, relative positioning, and volume fraction of CNT and strain hardening parameter of matrix on the mechanical properties of nanocomposites. The obtained results indicate that, properties such as modulus of elasticity and hardness of the nanocomposites are largely dependent on wall thickness of CNT and strain hardening parameter of the matrix. This study also suggests, the minimum wall thickness of CNT to avoid local buckling in nanocomposite which is required to be at least 0.2 nm for a diameter to thickness ratio of 5.0. Moreover, a matrix having a value of strain hardening parameter near 0.1 is expected to be significantly effective for nanocomposite.

摘要

利用基于有限元（FE）方法的压痕模拟，考虑单元的大应变弹塑性行为，获得了碳纳米管（CNT）增强复合材料的力学性能。本研究包括对化学非键合CNT/基体界面的纳米压痕模拟，包括纳米复合材料的长度尺度效应。为了研究CNT增强纳米复合材料的力学性能，模拟了许多用于纳米压痕测试的有限元模型。对样品纳米复合材料进行了研究，以确定合适的CNT类型及其作为不同潜在基体增强材料的有效性。进行了参数研究，以获得CNT的壁厚、相对位置、体积分数以及基体的应变硬化参数对纳米复合材料力学性能的影响。所得结果表明，纳米复合材料的弹性模量和硬度等性能在很大程度上取决于CNT的壁厚和基体的应变硬化参数。本研究还表明，对于直径与厚度比为5.0的情况，纳米复合材料中避免局部屈曲所需的CNT最小壁厚至少为0.2nm。此外，应变硬化参数值接近0.1的基体预计对纳米复合材料具有显著效果。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/522c/7404541/d0a0a1f875f4/gr8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/522c/7404541/78bc20ac43dd/gr9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/522c/7404541/dc973bfbf5d7/gr10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/522c/7404541/9f6dfbbd9370/gr11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/522c/7404541/7d46334d9e69/gr12.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/522c/7404541/d5a29881b5cd/gr13.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/522c/7404541/af56ae8cc3c6/gr14.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/522c/7404541/138bb28e0988/gr15.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/522c/7404541/f9783d4548a9/gr16.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/522c/7404541/8b9282cb4f9e/gr17.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/522c/7404541/17ed5dfbd9cd/gr18.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/522c/7404541/e5aaa2aefe2d/gr19.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/522c/7404541/22396488be43/gr20.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/522c/7404541/25308e607f3e/gr22.jpg

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Microstructure and nanoindentation behavior of Cu composites reinforced with graphene nanoplatelets by electroless co-deposition technique.通过化学镀共沉积技术制备的石墨烯纳米片增强铜基复合材料的微观结构与纳米压痕行为
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The interfacial strength of carbon nanofiber epoxy composite using single fiber pullout experiments.
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Nanotechnology. 2009 Jul 22;20(29):295701. doi: 10.1088/0957-4484/20/29/295701. Epub 2009 Jul 1.
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Nano-indentation studies on polymer matrix composites reinforced by few-layer graphene.基于少层石墨烯增强的聚合物基复合材料的纳米压痕研究
Nanotechnology. 2009 Mar 25;20(12):125705. doi: 10.1088/0957-4484/20/12/125705. Epub 2009 Mar 4.
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