סמינר מחלקה של נועה בילטמן - מאפיינים מכניים של חומרים מרוכבים קרמיים C/C-SiC: מחקר חישובי וניסיוני

School of Mechanical Engineering Seminar
Monday November 27.11.2023

Wolfson Building of Mechanical Engineering,room 206

Mechanical Properties of C/C-SiC Ceramic Composites :

A Computational and Experimental Study
 

Noa Blitman

M.Sc. research under the supervision of Prof. Rami Haj-Ali Tel-Aviv University, Department of Mechanical Engineering

Advanced Ceramic Matrix Composites (CMCs) are being developed for their exceptional durability in high-temperature environments, making them crucial in aerospace and various other applications. This study focuses on a specific CMC material system composed of pyrolyzed 8-harness phenolic carbon-matrix composites, manufactured using the Liquid Silicon Infiltration (LSI) process.

The initial segment of this seminar is dedicated to predicting mechanical properties. Utilizing advanced CT scans and applying the Parametric High Fidelity Generalized Method of Cells (PHFGMC) micro-mechanical model, a refined Repeating Unit Cell (RUC) is achieved. The proposed PHFGMC demonstrates its capability to provide predictive local responses and equivalent properties. Additionally, this study introduces two reduction algorithms aimed at enhancing computational efficiency.

The experimental part of the study outlines three mechanical tests employed to determine certain orthotropic material properties, namely 4-point bending, v-notch shear, and short beam shear. The results from these tests are compared with the predictions from the PHFGMC model. It is demonstrated that the proposed model effectively captures the material behavior, which holds promise for future applications in the design and manufacturing of other CMC material systems.

https://tau-ac-il.zoom.us/j/86497933118