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Entwicklung eines Schädigungskriteriums zur Defektanalyse von Faserverbundwerkstoffen

Shang, Binggang and Chrupalla, David and Khattab, Imad Al-din (2010) Entwicklung eines Schädigungskriteriums zur Defektanalyse von Faserverbundwerkstoffen. DLR-Interner Bericht. DLR-IB 2010/58, 85 S.

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Abstract

Due to defects during the manufacture of ber-reinforced composite materials, nite element analyses are performed to investigate the material behaviors. Hashin criteria are emphasized for damage initiation in this thesis since it rst presents a di erent way of approaching the generation of composites failure criteria, in which di erent failure modes are considered. By using build-in Hashin criterion function in the FEM program Abaqus two-dimentional stress analysis can be carried out. It is here assumed that the matrix and ber materials are linearly elastic, isotropic, and homogenous. Due to the ber orientation the reinforced material is anisotropic. This thesis starts from di erent analytical models of a ber-reinforced lamina with initial ber misalignment and its modeling in Abaqus/CAE. Then, the fundamental knowledge of Hashin criterion is introduced and nite element analyses for elastic sti nesses and strengths of a carbon-epoxy composite system are performed. Finally, the Hashin criteria are consequently extended in consideration of ber waviness.

Document Type:Monograph (DLR-Interner Bericht)
Title:Entwicklung eines Schädigungskriteriums zur Defektanalyse von Faserverbundwerkstoffen
Authors:
AuthorsInstitution or Email of Authors
Shang, BinggangUNSPECIFIED
Chrupalla, DavidUNSPECIFIED
Khattab, Imad Al-dinUNSPECIFIED
Date:November 2010
Number of Pages:85
Keywords: Effects of Defects, Faserwelligkeiten, Materialfestigkeit, Materialsteifigkeit, FEM
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures & Materials
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Doris Ries
Deposited On:03 Feb 2011 11:30
Last Modified:03 Feb 2011 11:30

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