Organisation/Company: CNRS
Department: Matériaux Ingénierie et Science
Research Field: Engineering » Materials engineering, Physics » Acoustics
Researcher Profile: Recognised Researcher (R2)
Country: France
Application Deadline: 1 Dec 2024 - 00:00 (UTC)
Type of Contract: Temporary
Job Status: Full-time
Hours Per Week: 35
Offer Starting Date: 2 Dec 2024
Is the job funded through the EU Research Framework Programme? Not funded by a EU programme
Is the Job related to staff position within a Research Infrastructure? No
Offer Description
This post-doc aims to study the thermomechanical behavior and damage of a ceramic matrix composite under development. This experimental work is particularly interested in carrying out instrumented thermomechanical tests on a composite with inorganic fibers and a geopolymer matrix and analyzing its damage. This study focuses on quasi-static and fatigue loading at room temperature and at high temperature under air.
The objective of this study is to determine the potential of this type of composite for use at high temperatures, and to contribute to the optimization of its manufacturing as well as its repairability.
To carry out this study, the following aspects must be addressed:
Setting up and carrying out mechanical traction and bending tests at room temperature and hot
Carrying out tests instrumented by image correlation and acoustic emission
Characterization of damage by microstructural observations under SEM and under X-ray tomography
Finite element modeling of the mesostructure of the composite and its damage in connection with microstructural observations and macroscopic thermomechanical behavior
This 18-month post-doc is part of a collaborative project between MATEIS (UMR 5510, located at INSA Lyon) and the ICA (UMR 5312, located at IMT MInes Albi) and will mainly take place at MATEIS. The MATEIS laboratory (around 150 people) works on the microstructure/property relationships of different classes of materials including ceramics and composites. The post-doc proposed here is part of the activities of the Ceramics and Composites group of MATEIS and is particularly focused on ceramic matrix composites.
This project aims to study a sandwich composite with inorganic fibers and a geopolymer matrix with a view to its optimization in connection with its manufacturing process. The work of the post-doctoral researcher will focus on studying the thermomechanical behavior of this composite in order to evaluate its mechanical properties but also to identify its damage mechanisms and its thermomechanical potential under monotonic loading and fatigue. The hot behavior will be studied in a temperature range up to a few hundred degrees Celsius. This experimental study will use mechanical tests instrumented by acoustic emission and followed by image correlation, and will rely on conventional microstructural observations (SEM, X-ray tomography) to analyze the microstructural damage mechanisms, in particular at the interlaminar level. Beyond understanding the basic behavior of this type of composite, knowledge of these mechanisms should also provide insight into the reparability of this type of material and the analysis of its life cycle.
This post-doc will take place in conjunction with a second post-doc which has already started as part of this project and which is more particularly interested in composite manufacturing methods.
For this large experimental subject, it is desired to have skills in the following points:
Experimental mechanical characterization of composites
Microstructural observations and analyzes (SEM, X-ray tomography)
Correlation of digital images
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