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Bridging of Finite Element Models at sample and component level for UHTCMCs (Masterarbeit)

Hysa, Ilda and Jain, Neraj (2019) Bridging of Finite Element Models at sample and component level for UHTCMCs (Masterarbeit). Master's. DLR-Interner Bericht. DLR-IB-BT-ST-2019-164, 63 S.

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Abstract

The modeling of Ultra High Temperature Ceramic Matrix Composites (UHTCMC) is important to material science because of the relevance of this class of materials on an increasing number of aerospace applications. The ultimate interest of the engineers and scientists lies on the macrostructural properties of the final component. This level is studied using homogenized material properties, which are governed by the various and complex interactions on the microscale level. In this work a microstructural model based on Finite Element method simulations was mapped out. The focus of the work was the simulation of samples subjected to transverse tensile loading, having undergone temperature treatment. Given as the morphology of the microstructure dictates some of the most important features of the overall behavior, randomly generated microstructures were adopted to study the effects of voids and cracks in the matrix properties, thus using a computational methodology to describe the probabilistic strength distribution. Computational results were obtained on the effect of thermal load (cooling after the sintering process) on crack formation and ultimately on the stiffness of the composite. A baseline material with reference properties for future research was presented. A working model on the scale of a test coupon which employs the obtained results is presented, linking the macrostructural scale to the microstructural Representative Volume Element.

Item URL in elib:https://elib.dlr.de/130778/
Document Type:Monograph (DLR-Interner Bericht, Master's)
Title:Bridging of Finite Element Models at sample and component level for UHTCMCs (Masterarbeit)
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hysa, IldaIlda.Hysa (at) dlr.deUNSPECIFIED
Jain, NerajNeraj.Jain (at) dlr.dehttps://orcid.org/0000-0002-7853-1894
Date:November 2019
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:63
Status:Published
Keywords:multiscale, UHTCMC, finite element, size effect
Institution:University of Stuttgart
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
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Ceramic Composite Structures
Deposited By: Jain, Neraj
Deposited On:19 Nov 2019 12:09
Last Modified:19 Nov 2019 12:09

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