Effect of filler content on the stress relaxation behavior of fly ash/polyurea composites

被引：9

作者：

Qiao, Jing ^{[1
]}

Wu, Yingdan ^{[2
]}

Li, Longqiu ^{[2
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

[2] Harbin Inst Technol, State Key Lab Robot & Syst, Harbin 150001, Peoples R China

来源：

POLYMER TESTING | 2020年 / 81卷

基金：

中国国家自然科学基金;

关键词：

Polyurea-based composites; Fly ash hollow sphere; Stress relaxation; Viscoelastic model; FRACTIONAL CALCULUS; CONSTITUTIVE MODEL; DYNAMIC PROPERTIES; POLYUREA; DEFORMATION; TENSILE; PROPERTY;

D O I：

10.1016/j.polymertesting.2019.106168

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, fly ash/polyurea (FA/PU) composites of various fly ash volume fractions were fabricated. The time-domain stress relaxation behaviors of pure polyurea and the FA/PU composites were measured by dynamic mechanical analysis (DMA) in tension mode at various temperatures. Both temperature and volume fraction of fly ash can affect the segmental motion of polyurea as well as the interaction between fly ash hollow spheres and polyurea matrix, which constitutes the intrinsic mechanism of stress relaxation. Master curves of relaxation modulus were constructed and compared for PU and FA/PU composites. A model was proposed to relate the relaxation modulus and volume fraction of fillers based on three-parameter fractional derivative model and Mori-Tanaka model. The numerical predictions obtained from the model are found to be in good agreement with the experimental results.

引用

页数：8

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