Simulation of the Forming Process of Non-Crimp Fabrics
Başlık çevirisi mevcut değil.
- Tez No: 692560
- Danışmanlar: PROF. DR. FABİAN DUDDECK
- Tez Türü: Yüksek Lisans
- Konular: Makine Mühendisliği, Mekatronik Mühendisliği, Mechanical Engineering, Mechatronics Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2018
- Dil: İngilizce
- Üniversite: Technische Universität München
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 82
Özet
Özet yok.
Özet (Çeviri)
The favorable mechanical properties of Non-Crimp Fabrics make them popular in the aerospace and automotive industry. Nevertheless, forming of these fabrics into threedimensional final parts is not as straightforward as for traditional materials and other woven textiles. As a result of the automated forming processes, wrinkling defects and asymmetrical shear behavior are observed in NCFs. These defects and asymmetrical shear behavior deteriorate the quality of the final draped part and decrease productivity of the automated forming process. Therefore, to foresee this defects and take precautions to prevent them happening, Finite Element (FE) simulations of the forming processes of NCFs are needed. In the context of this thesis, a continuum material model which can account for the forming induced defects such as wrinkling and asymmetrical shear behavior happening in NCFs is introduced by utilizing the commercial FEM software ABAQUS/CAE. As a result of the literature screening, FABRIC and VFABRIC user subroutines are found suitable for implementing material properties of NCFs. Picture Frame test simulations are conducted for developing the material model for NCFs. At the end, a hemispherical draping simulation with the developed material model is performed and the wrinkling defects and asymmetrical deformations are observed. In addition, measures to diminish the effects of these wrinkling defects and asymmetrical shear behavior of NCFs are discussed.
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