Effect of tackification on in-plane shear behaviours of biaxial woven fabrics in bias extension test: Experiments and finite element modeling

2018 ◽  
Vol 159 ◽  
pp. 33-41 ◽  
Author(s):  
Xiaoran Zhao ◽  
Gang Liu ◽  
Ming Gong ◽  
Jiupeng Song ◽  
Yan Zhao ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Woven Fabrics ◽  
Plane Shear ◽  
Element Modeling ◽  
Bias Extension Test ◽  
Bias Extension

scholarly journals Bias extension test on an unbalanced woven composite reinforcement: Experiments and modeling via a second-gradient continuum approach

2016 ◽  
Vol 51 (2) ◽  
pp. 153-170 ◽  
Author(s):  
Gabriele Barbagallo ◽  
Angela Madeo ◽  
Ismael Azehaf ◽  
Ivan Giorgio ◽  
Fabrice Morestin ◽  
...  
Keyword(s):  
Constitutive Expression ◽  
Woven Fabrics ◽  
Woven Composite ◽  
Plane Shear ◽  
Second Gradient ◽  
Proposed Model ◽  
Bias Extension Test ◽  
Bias Extension ◽  
Deformation Patterns ◽  
Second Gradient Continuum

The classical continuum models used for the woven fabrics do not fully describe the whole set of phenomena that occur during the testing of those materials. This incompleteness is partially due to the absence of energy terms related to some microstructural properties of the fabric and, in particular, to the bending stiffness of the yarns. To account for the most fundamental microstructure-related deformation mechanisms occurring in unbalanced interlocks, a second-gradient, hyperelastic, initially orthotropic continuum model is proposed. A constitutive expression for the strain energy density is introduced to account for (a) in-plane shear deformations, (b) highly different bending stiffnesses in the warp and weft directions, and (c) fictive elongations in the warp and weft directions which eventually describe the relative sliding of the yarns. Numerical simulations which are able to reproduce the experimental behavior of unbalanced carbon interlocks subjected to a bias extension test are presented. In particular, the proposed model captures the macroscopic asymmetric S-shaped deformation of the specimen, as well as the main features of the associated deformation patterns of the yarns at the mesoscopic scale.

In-plane shear investigation of biaxial carbon non-crimp fabrics with experimental tests and finite element modeling

2014 ◽  
Vol 63 ◽  
pp. 757-765 ◽  
Author(s):  
Long Li ◽  
Yan Zhao ◽  
Ha-gia-nam Vuong ◽  
Yuan Chen ◽  
Jin Yang ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Experimental Tests ◽  
Plane Shear ◽  
Element Modeling

Experimental and finite element analysis of in-plane shear properties of a carbon non-crimp fabrics at macroscopic scale

2017 ◽  
Vol 52 (2) ◽  
pp. 235-244 ◽  
Author(s):  
Samir Deghboudj ◽  
Wafia Boukhedena ◽  
Hamid Satha
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Elastic Model ◽  
Macroscopic Scale ◽  
Element Analysis ◽  
Plane Shear ◽  
Shear Properties ◽  
Bias Extension Test ◽  
Bias Extension ◽  
Composite Reinforcement

Shear deformation of composite reinforcement is the most significant and important mechanism of material characterization. So, in-plane shear properties of composite reinforcement are important parameters for determining application and use of this category of materials. The bias extension test is frequently employed to investigate the in-plane shear behavior of composites fabrics with a length equal to or greater than twice its width. In the first part of this work, bias extension tests on non-crimp fabrics have been conducted. Force and displacement were measured and registered. From obtained data, shear angles and normalized shear forces were theoretically determined. The second part was a finite element analysis of the same test based on hypo elastic model at macroscopic scale. The software ABAQUS/Explicit was used to carry out the finite element analysis in the work.

Exact First Order Finite Element Modeling for Eddy Current NDE

1991 ◽  
Vol 3 (1) ◽  
pp. 235-253 ◽  
Author(s):  
L. D. Philipp ◽  
Q. H. Nguyen ◽  
D. D. Derkacht ◽  
D. J. Lynch ◽  
A. Mahmood
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Eddy Current ◽  
Element Modeling ◽  
First Order ◽  
Eddy Current Nde
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