Post doc position in Mechanics of pressurized cellular solids

Aix-Marseille Université


3 Jul 2023
Job Information

Organisation/Company
Aix-Marseille Université
Research Field
Other
Researcher Profile
Recognised Researcher (R2)
Country
France
Application Deadline
31 Aug 2023 – 23:59 (Europe/Paris)
Type of Contract
Temporary
Job Status
Full-time
Hours Per Week
35
Offer Starting Date
1 Sep 2023
Is the job funded through the EU Research Framework Programme?
Not funded by an EU programme
Is the Job related to staff position within a Research Infrastructure?
No

Offer Description

Mimosa Pudica moves its foliage when touched in less than a second by changing turgor pressure in pulvinus cells. Pulvinus tissue consists of flexible thin-walled parenchyma cells organised around a core of vascular pipes (xylem/phloem for water/sap transport), see fig 1. The selective change of cell turgor pressure allows, for instance, the contraction of the upper pulvinus (flacid cells) and expansion (turgid cells) of the lower one, achieving leaf motion by bending.

The research goal is to elucidate the mechanical properties of pressurized cellular solids. The research has two aims:

  • Cell level: The goal is to determine Young modulus of pressurized cellular solids from an energetic analysis of a single cell considering a periodic lattice. The macroscopic Young’s modulus will be characterized both in the linear and non linear regimes considering thinning of cellular elastic walls and strain hardening material. This research will be complemented with numerical simulations (finite elements) to obtain the prefactor of the scaling laws found analytically.
  • Tissue level: The goal is to find the macroscopic mechanical properties (Anisotropic Young modulus and Poisson coefficient) depending on the pressurisation pattern considered. The modelling will be done considering a 3D array of cells with on and off cells similar to a 3D array of springs in parallel and series. The refined modelling will consider cells with a continuum of pressures.
  • The model will be compared to (i) controlled idealized lab prototypes (50 to 200 cells). And (ii) to living plant pulvinus (Mimosa Pudica).
  • FUNDING : ANR MExP

    Requirements

    Research Field
    Engineering » Mechanical engineering
    Education Level
    PhD or equivalent

    Skills/Qualifications

    • PhD in mechanics/engineering
    • Knowledge in pressurized membranes
    • Theory of soft solids
    • Analytical and critical thinking

     

     

    Additional Information
    Benefits

    Net salary: between 2051 and 2404 euros per month net depending on professional experience.

    The Euraxess Center of Aix-Marseille Université informs foreign visiting professors, researchers, postdoc and PhD candidates about the administrative steps to be undertaken prior to arrival at AMU and the various practical formalities to be completed once in France: visas and entry requirements, insurance, help finding accommodation, support in opening a bank account, etc. More information on AMU EURAXESS Portal

    Work Location(s)

    Number of offers available
    1
    Company/Institute
    Institut des sciences du mouvement – ISM Lab
    Country
    France
    City
    Aix-en-Provence
    Postal Code
    13100
    Street
    Institut des sciences du mouvement, IUT Aix-en-Provence, 413 Avenue Gaston Berger

    Where to apply

    E-mail
    [email protected]

    Contact

    City
    Marseille
    Website
    http://www.univ-amu.fr
    Street
    58 boulevard Charles-Livon (Headquaters)
    Postal Code
    13007

    STATUS: EXPIRED

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