Anisotropic Mechanical Response and Strain Localization of a Metallic Glassy-Fiber-Reinforced Polyethylene Terephthalate Fabric

Materials

Jun Shen¹  Bo Huang²  Jun Yi²  Gang Wang²  Jie Li²  Yandong Jia²  Rongjie Xue³ 

[1] College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China;Laboratory for Microstructures, Institute of Materials, Shanghai University, Shanghai 200444, China;School of Materials Engineering, Jiangsu University of Technology, Changzhou 213001, China;

关键词: strain localization;    metallic glassy fibers;    digital image correlation;    structural anisotropy;   

DOI  :  10.3390/ma14195619

来源: DOAJ

【 摘 要 】

Optimizing the mechanical properties of composites through microstructural design has been a long-standing issue in materials science. In this study, we reinforced a typical polymer, i.e., polyethylene-terephthalate-woven fabric, with a type of Fe-based metallic glassy fiber (MGF) with an extremely large Young’s moduli. The MGF-reinforced fabrics, with three different fiber bundle orientations (0°, 45°, and 90°), were investigated by in situ electron-microscopy mechanical testing techniques in conjunction with a digital image correlation (DIC) technique. The fabrics exhibited a pronounced anisotropic mechanical response, and the associated characteristics were verified to depend on the fiber bundle orientation relative to the external load. Furthermore, localized strains near the intersections of the fiber bundles were found to be much higher than the global strain. It is confirmed that the restriction from warp to weft is the dominant factor influencing strain localization during deformation. Our results are enlightening for understanding the fracture mechanisms of composites.

【 授权许可】

Unknown