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Investigation of Statistical Distribution of C/C-SiC Composite’s Mechanical Properties

Shi, Yuan and Xiu, Yanlei and Koch, Dietmar (2019) Investigation of Statistical Distribution of C/C-SiC Composite’s Mechanical Properties. Key Engineering Materials, 809, pp. 131-139. Trans Tech Publications. doi: 10.4028/www.scientific.net/KEM.809.131. ISSN 1013-9826.

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Because of the excellent fracture toughness and oxidation resistance, carbon fiber reinforced silicon carbide (C/C-SiC or C/SiC) exhibits a sound potential in various application areas such as aerospace technology and high-performance braking systems. For the composite’s reliable design, production, examination, quality assurance and verification, however, the statistical distribution of mechanical properties is of crucial interest and has not been investigated in detail yet. In this work, the strength values of C/C-SiC composite, which was developed via Liquid Silicon Infiltration at the Institute of Structures and Design of German Aerospace Center (DLR), were measured under tensile, bending and compression load. The results were analyzed by normal and Weibull distribution statistics and verified by Kolmogorov–Smirnov-test (KS-test) and Anderson–Darling-test (AD-test). Based on the statistical analysis, the 4PB-strength of C/C-SiC composite can be better described by Weibull distribution. In comparison, normal distribution is more suitable for the compression strength. The influence of different numbers of coupons on the mechanical properties has been identified. A scanning electron microscope (SEM) was employed to analyze the fracture surface, which confirmed that the different statistical distribution of strength values was caused by various failure mechanisms.

Item URL in elib:https://elib.dlr.de/131296/
Document Type:Article
Title:Investigation of Statistical Distribution of C/C-SiC Composite’s Mechanical Properties
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Shi, Yuanyuan.shi (at) dlr.dehttps://orcid.org/0000-0002-4210-9069
Xiu, YanleiYanlei.Xiu (at) dlr.deUNSPECIFIED
Koch, DietmarDietmar.Koch (at) dlr.dehttps://orcid.org/0000-0003-4504-8721
Journal or Publication Title:Key Engineering Materials
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.4028/www.scientific.net/KEM.809.131
Page Range:pp. 131-139
Publisher:Trans Tech Publications
Keywords:C/C-SiC composite, statistical distribution, mechanical properties
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials (old)
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Ceramic Composite Structures
Deposited By: Shi, Dr.-Ing. Yuan
Deposited On:28 Nov 2019 11:00
Last Modified:28 Nov 2019 11:00

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