Determinação do módulo de cisalhamento do Poliestireno Expandido por torção utilizando uma abordagem ortotrópica

Materia

article

Pedro Vitor de Barba¹  Ricardo Pedro Bom²  Alexandre Wentz Zorzi¹  Guilherme de Faveri¹  Renato Barbieri² 

[1] UDESC;Universidade do Estado de Santa Catarina

关键词: Geofoam;    ASTM E143-13;    Anisotropy;   

DOI  :  10.1590/S1517-707620210003.12999

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

In this paper an equations system was used and a numerical procedure was applied to determine, with an orthotropic approach, the shear modulus of Expanded Polystyrene (EPS) by experimental torsion tests using specimens from three orthogonal direction. The specimens used in this work were obtained from a EPS’s block used in the construction for soft soil stabilization called Geofoam. In their applications these blocks are subjected to compression, tensile and torsion strengths. The mean EPS specific mass was 26.51 ± 3.21 kg / m³ and its mature pearls had diameters ranging from 0.9 to 2.5 mm. The apparent shear moduli, obtained by torsion tests, fed the nonlinear system proposed by Lekhnitskiy and Semenov and developed for orthotropic materials. Such equation was solved using the Newton-Raphson numerical method, all possible solutions were appreciated. The results indicated that the average values of G of each plane can be represented by the orthotropic model, thus their orders of magnitude; Gxy = 6,101 MPa, Gxz = 5,796 MPa and Gyz = 5,736 MPa.

【 授权许可】

CC BY