Analysis of Woven Fabric Strengths: Prediction of Fabric Strength under Uniaxial and Biaxial Extensions
نویسنده
چکیده
This study of woven fabric strength begins by focusing on the effects of the crossing points, where warp and weft yarns interlace with each other to form a fabric, towards the ultimate fabric tensile strength. When a fabric is under uniaxial or biaxial tension, the yarn-yarn interactions at the crossing points are found to consist of two components, a pressure-independent adhesive component and a pressure-dependent frictional one, of which the latter is proved to be dominant. On the basis of the analysis, the yarn critical length in the fragmentation process during fabric extension is defined and calculated. Moreover, by treating the fabric as an assemblage of yarn bundles, the distribution density function of the strengths between individual yarns in the same bundle is provided based on the single yarn strength distribution, and the fracture process of the bundle can be better described using this function. Then, by incorporating the critical yarn length into the distribution density function of the yarn strength, the in situ behavior of the yarn bundle in a fabric is predicted. Following the chain of sub-bundle model, the mean fabric strength and the fabric stress/strain curve are predicted more realistically for both uniaxial and biaxial tension cases. The predictions of the present theory compare favorably with the measured fabric strengths both previously reported and tested in the present work. A detailed parametric study is also carried out.
منابع مشابه
Strength Prediction of Notched Woven Composite Plates using a Cohesive Zone Approach
The present paper is concerned with modelling damage and fracture in notched woven fabric composites. Previous experimental work has shown that damage at a notch in a variety of GFRP and CFRP composites based on woven fabric reinforcement comprises matrix damage and fibre tow fracture along the plane of maximum stress. It is these experimental observations that inform the failure modelling deve...
متن کاملNew Micromechanical Model for Predicting Biaxial Tensile Moduli of Plain Weave Fabric Composites
New Micromechanical Model for Predicting Biaxial Tensile Moduli of Plain Weave Fabric Composites J B Bai, J J Xiong*, Q Wang School of Transportation Science and Engineering, Beihang University, Beijing, 100191, People’s Republic of China (*, corresponding author: [email protected]) Abstract: This paper addresses a new micromechanical model to predict biaxial tensile moduli of plain weave fab...
متن کاملPhysically-based Finite Element Strength Prediction in Notched Woven Laminates under Quasi-static Loading
The present paper is concerned with modelling damage and fracture in notched woven fabric composites. Previous experimental work has shown that, under tensile loading, damage at a notch in a variety of GFRP and CFRP composites based on woven fabric reinforcement comprises matrix damage and fibre tow fracture along the plane of maximum stress. It is these experimental observations that inform th...
متن کاملCharacterisation of material properties for draping of dry woven composite material
Three test methods, uniaxial bias extension, biaxial and picture frame tests are used to characterise the shear behaviour of dry woven fabric during draping. The deformation of the bias extension and biaxial specimens is measured from images of a central gauge section. The forces applied to the material are resolved into forces along and parallel to the tow directions. The deformation of the ma...
متن کامل