|
|||||
|
|
Predicting the tensile strength of needle-punched nonwoven mats using X-ray computed tomography and a statistical model |
|
| Authors: | Seung-Yeol Jeon Woong-Ryeol Yu Min Sun Kim Joon Seok Lee Jong Won Kim |
| Institution: | 1. Department of Materials Science and Engineering and Research Institute of Advanced Materials (RIAM), College of Engineering, Seoul National University, Seoul, 151-742, Korea 2. Textile Fusion Technology R&D Department, Korea Institute of Industrial Technology, Seoul, Korea 3. Department of Textile Engineering and Technology, Yeungnam University, Gyeongsan, 712-749, Korea |
| Abstract: | As nonwoven mats are randomly oriented fiber assemblies, the tensile strength of nonwoven mats is determined by their microstructural factors, such as fiber orientation, fiber volume fraction, and fiber-fiber contact level. The complex microstructure of nonwoven mats must be reasonably simplified to properly predict their mechanical properties within affordable efforts. In this study, a new parameter, so called contact efficiency, is defined to describe the fiber-fiber contact level of nonwoven mats. Micro X-ray computer tomography (CT) is employed to characterize the microstructure of needlepunched nonwoven mats made of polypropylene short fibers. The fiber orientation and volume fraction are obtained by analyzing 2D sectional CT image of the nonwoven mat, while the contact efficiency is determined from 3D CT image. A statistical model, developed originally for staple yarns, is modified to predict the tensile strength of the nonwoven mat using the microstructural factors obtained from CT analysis. The prediction is then compared with experiments to validate that the current model incorporating the contact efficiency is highly suitable for predicting the tensile strength of nonwoven mats. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |