Microscopic deformation mechanisms of unidirectional fiber bundles under transverse compressive stresses

The high-performance filament yarns, such as carbon fiber yarn, glass fiber yarn, and Kevlar fiber yarn, have characterized as unidirectional，high parallel filament in fiber bundle. However, due to the difficulties in statistically analyzing the micro-structural characteristics of high-performance fiber bundles comprising of thousands of filaments, Nylon (PA6) filament yarns were chosen as the substitute of high-performance fiber bundles to study the deformation micro-mechanisms of fiber bundles under transverse compressive stresses. In order to evaluate the effects of different compressive stresses on the deformation properties, the synchrotron radiation X-ray micro-computed tomography (micro-CT) was used to obtain cross-section images of the fiber bundle during the compression testing. In particular, the influences of compressive stress on the fiber volume fraction, fiber distribution, fiber contact, and fiber orientation were studied. Results indicate a strong dependence of the microstructure of fiber bundles on the compressive stress.

[1]  Zhenqing Wang,et al.  Effects of interphase properties in unidirectional fiber reinforced composite materials , 2011 .

[2]  Laurent Orgéas,et al.  Towards the 3D in situ characterisation of deformation micro-mechanisms within a compressed bundle of fibres , 2011 .

[3]  Carlos González,et al.  Mechanical behavior of unidirectional fiber-reinforced polymers under transverse compression: Microscopic mechanisms and modeling , 2007 .

[4]  Ji-Huan He,et al.  Fibrous Materials as Soft Matter , 2007 .

[5]  Matthieu Faessel,et al.  3D Modelling of random cellulosic fibrous networks based on X-ray tomography and image analysis , 2005 .

[6]  Guangming Zhou,et al.  Multi-chain digital element analysis in textile mechanics , 2004 .

[7]  Takashi Komori,et al.  Analyzing the Compressibility of a Random Fiber Mass Based on the Modified Theory of Fiber Contact , 1997 .

[8]  Ning Pan,et al.  Fiber Contact in Fiber Assemblies , 1995 .

[9]  N. Pan.  Analytical Characterization of the Anisotropy and Local Heterogeneity of Short Fiber Composites: Fiber Fraction as a Variable , 1994 .

[10]  Ning Pan,et al.  A Modified Analysis of the Microstructural Characteristics of General Fiber Assemblies , 1993 .

[11]  N. Pan.  Theoretical determination of the optimal fiber volume fraction and fiber‐matrix property compatibility of short fiber composites , 1993 .

[12]  Takashi Komori,et al.  A Model Analysis of the Compressibility of Fiber Assemblies , 1992 .

[13]  T. Gutowski,et al.  The Elastic Deformation of Lubricated Carbon Fiber Bundles: Comparison of Theory and Experiments , 1992 .

[14]  N. Pan,et al.  Theory of the Shear Deformation of Fibrous Assemblies , 1989 .

[15]  S. J. Wineman,et al.  Consolidation Experiments for Laminate Composites , 1987 .

[16]  T. Komori,et al.  Geometrical Expressions of Spaces in Anisotropic Fiber Assemblies , 1979 .

[17]  Takashi Komori,et al.  Estimation of Fiber Orientation and Length in Fiber Assemblies , 1978 .

[18]  T. Komori,et al.  Numbers of Fiber-to-Fiber Contacts in General Fiber Assemblies , 1977 .

[19]  C. M. van Wyk,et al.  20—NOTE ON THE COMPRESSIBILITY OF WOOL , 1946 .

[20]  Liu Jin-chao.  Characterization and reconstruction of high performance fiber bundles at the scale of fiber , 2012 .

[21]  Timothy G. Gutowski,et al.  Advanced composites manufacturing , 1997 .

[22]  R. Postle,et al.  Strengths of Twisted Blend Fibrous Structures: Theoretical Prediction of the Hybrid Effects , 1995 .

[23]  Stanley Backer,et al.  Structural mechanics of fibers, yarns, and fabrics , 1969 .