Elastic properties of unidirectional fiber-reinforced composites using asymptotic homogenization techniques

被引：19

作者：

de Macedo, Rafael Quelho ^{[1
]}

Luiz Ferreira, Rafael Thiago ^{[1
]}

Donadon, Mauricio Vicente ^{[1
]}

Guedes, Jose Miranda ^{[2
]}

机构：

[1] ITA, DCTA ITA IEM, BR-12228900 Sao Jose Dos Campos, SP, Brazil

[2] Univ Lisbon, IST, IDMEC IST, P-1049001 Lisbon, Portugal

来源：

JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING | 2018年 / 40卷 / 05期

基金：

巴西圣保罗研究基金会;

关键词：

Homogenized elastic properties; Asymptotic homogenization; Unidirectional fiber composite; Micromechanics; POROUS-MEDIA; PHASE-TRANSFORMATIONS; PERIODICAL STRUCTURES; STRESS; MECHANICS; EQUATIONS; TRANSPORT; CONDUCTIVITY; OPTIMIZATION; STIFFNESS;

D O I：

10.1007/s40430-018-1174-9

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The objective of this work is to use an asymptotic homogenization numerical model to obtain elastic properties of unidirectional fiber-reinforced composites. Square and perfect hexagonal unit cells are employed, and the influence of the fiber volume fraction over the homogenized elastic properties is studied. The effectiveness of the predictions is assessed by comparisons to experimental properties, and also another micromechanical model based on a representative volume element. The composites E-Glass 21xK43 Gevetex (glass fiber)/LY556/HT907/DY063 (epoxy matrix) and AS4 (carbon fiber)/3501-6 (epoxy matrix) were studied and good agreement between experimental and numerical predictions was found. Discrepancies between experimental and numerical data are explained in terms of simplifications considered in the homogenization model. An adjustment of properties here performed, based on varying fiber volume fractions, showed to be effective to physically represent the studied fiber composites in a micromechanical stress model based on asymptotic homogenization, developed to estimate failure envelopes of such materials.

引用

页数：11

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