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Gamma radiation induced compressive response of silicon rubber foam: Experiments and modeling

Published online by Cambridge University Press:  07 March 2019

Huyi Wang Open the ORCID record for Huyi Wang [Opens in a new window] ,
Yong Qiu ,
Wenjun Hu  and
Yongmei Chen
Huyi Wang
Affiliation:
CAEP, Institute of Systems Engineering, Mianyang 621999, China; and Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang, Sichuan 621999, China
Yong Qiu
Affiliation:
CAEP, Institute of Systems Engineering, Mianyang 621999, China; and Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang, Sichuan 621999, China
Wenjun Hu*
Affiliation:
CAEP, Institute of Systems Engineering, Mianyang 621999, China; and Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang, Sichuan 621999, China
Yongmei Chen
Affiliation:
CAEP, Institute of Systems Engineering, Mianyang 621999, China; and Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang, Sichuan 621999, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Utilizing the experimental and modeling approaches, the Gamma radiation effects on stress responses of the silicon rubber foam under quasistatic compression are investigated. In the experimental work, the samples of the silicon rubber and the silicon rubber foams are quasistatically compressed before and after the Gamma radiation (a dose of 500 kGy and a dose rate of 100 Gy/min). The data reveal that the Gamma radiation obviously increases the material hardness, e.g., the compressive stresses of the silicon rubber and the silicon rubber foams both increase over 5 times as the strain is 20%. In the simulation work, a multiscale method combined with finite element method is developed to numerically predict the compressive stress of the silicon rubber foams. The microscale models are first constructed based on the real microstructures of the silicon rubber foams. The compressive stress and strain relation before and after the Gamma radiation is then simulated and obtained utilizing the phenomenological constitutive models based on the testing data of the silicon rubber. The simulation reveals that the Gamma radiation strongly affects the compressive response of the microscale models. The stress responses of the microscale models are then transferred into the macroscale models. The results also prove that the Gamma radiation obviously increases the hardness of the macroscale models. Data comparison shows that the numerical results agree with the testing data well, which verifies the developed method. The present work develops a new method to predict the radiation effects on mechanical properties of rubber foams.

Keywords

radiation effectsfoamhardness
Type
Article
Information
Journal of Materials Research , Volume 34 , Issue 13: Focus Issue: Intrinsic and Extrinsic Size Effects in Materials , 15 July 2019 , pp. 2194 - 2200
Copyright
Copyright © Materials Research Society 2019 

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