Energy dissipation characteristics of polyurea and polyurea/carbon black composites

被引：7

作者：

Akl, W. ^{[1
]}

Nouh, M. ^{[2
]}

Aldraihem, O. ^{[3
]}

Baz, A. ^{[4
]}

机构：

[1] Ain Shams Univ, Fac Engn, Cairo 11517, Egypt

[2] SUNY Buffalo, Dept Mech & Aerosp Engn, Buffalo, NY 14260 USA

[3] King Saud Univ, Mech Engn Dept, Riyadh 11421, Saudi Arabia

[4] Univ Maryland, Mech Engn Dept, College Pk, MD 20742 USA

来源：

MECHANICS OF TIME-DEPENDENT MATERIALS | 2019年 / 23卷 / 02期

关键词：

Polyurea; carbon black composites; Energy dissipation; Cyclicloading; VISCOELASTIC SOLIDS;

D O I：

10.1007/s11043-018-9397-9

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The energy dissipation characteristics of polyurea and polyurea/carbon black composites are determined under cycling loading at different amplitudes and excitation frequencies. These characteristics are measured experimentally and validated against the predictions of finite element models (FEM). Further validation of the energy dissipated is carried out by comparisons with the product of the storage modulus and the loss factor of the polymer as obtained from the measurement of the complex moduli using the Dynamic Mechanical Thermal Analyzer (DMTA). The obtained results indicate an excellent agreement between the experiments and the predictions of the FEM. Furthermore, it is observed that the energy dissipated per unit volume of pristine polyurea is, on average, about 10% higher than that of polyurea/carbon black composites.

引用

页码：223 / 247

页数：25

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