Mechanical behavior of nanorubber reinforced epoxy over a wide strain rate loading

Yinggang Miao; Jianping Yin; Wenxuan Du; Lianyang Chen

Nano Materials Science (Feb 2024)

Mechanical behavior of nanorubber reinforced epoxy over a wide strain rate loading

Yinggang Miao,
Jianping Yin,
Wenxuan Du,
Lianyang Chen

Affiliations

Yinggang Miao: Joint International Research Laboratory of Impact Dynamics and Its Engineering Applications, School of Aeronautics, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China; State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xian, Shaanxi, 710049, China; Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application, School of Aeronautics, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China; Corresponding author. Joint International Research Laboratory of Impact Dynamics and Its Engineering Applications, School of Aeronautics, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China.
Jianping Yin: Joint International Research Laboratory of Impact Dynamics and Its Engineering Applications, School of Aeronautics, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China; Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application, School of Aeronautics, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China
Wenxuan Du: Joint International Research Laboratory of Impact Dynamics and Its Engineering Applications, School of Aeronautics, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China; Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application, School of Aeronautics, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China
Lianyang Chen: Joint International Research Laboratory of Impact Dynamics and Its Engineering Applications, School of Aeronautics, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China; Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application, School of Aeronautics, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China

Journal volume & issue: Vol. 6, no. 1
pp. 106 – 114

Abstract

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Nanorubber/epoxy composites containing 0, 2, 6 and 10 wt% nanorubber are subjected to uniaxial compression over a wide range of strain rate from 8 × 10−4 s−1 to ∼2 × 104 s−1. Unexpectedly, their strain rate sensitivity and strain hardening index increase with increasing nanorubber content. Potential mechanisms are proposed based on numerical simulations using a unit cell model. An increase in the strain rate sensitivity with increasing nanorubber content results from the fact that the nanorubber becomes less incompressible at high strain, generating a higher hydro-static pressure. Adiabatic shear localization starts to occur in the epoxy under a strain rate of 22,000 s−1 when the strain exceeds 0.35. The presence of nanorubber in the epoxy reduces adiabatic shear localization by preventing it from propagating.

Published in Nano Materials Science

ISSN: 2589-9651 (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Technology: Engineering (General). Civil engineering (General)
Website: https://www.keaipublishing.com/en/journals/nano-materials-science/

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