Unfurtunately the monastery Irsee has been closed by the Bavarian government due to the corona virus.

Therefore we have decided to offer the conference as a web conference only.

In those unpredictable times, protecting our participants’ health has the highest priority for us!

The scientific exchange must not come to a complete standstill and we believe that with this web solution we have found a way to keep the scientific community going.

In order to participate in the livestream of the conference as easy as possible and to give your presentation, we recommend the use of the web browsers Google Chrome or Microsoft Edge.

Here you can find detailed instructions for using the livestream.

As a participant of the Bioinspired 2020 you have received an e-mail containing the login data for the web conference.

The login data for the sessions are provided daily.

In order to allow all conference participants access to the posters, we ask you to upload your poster by login on the conference homepage and clicking on the button "My Submission" in the upper right corner of the conference homepage. Then select the submission to which you want to upload the poster and upload the poster at the bottom of the page.

Furthermore we would like to ask all poster authors to prepare 4 PowerPoint slides to present your poster to the audience.
Please also include your contact details on the digital poster to allow participants to reach you with questions.

Please note that your poster will be pictured publically.

As poster author you can upload your poster similar to the way you submitted your abstract.
Click on "My Submissions" in the upper right corner at the homepage.

Poster documents can be found by opening the respective abstract in the online programme.
If a poster document has already been uploaded for the abstract, it can then be opened and downloaded.

Please note that your poster will be pictured publically.

You can ask your questions via chat already during the presentations!
Please use for this the Q&A (F&A) button!

For further scientific exchange we implemented a discussion forum on the homepage of the DGM.
Please visit and use your DGM or Bioinspired user credentials to login.

Back to overview

Poster with short presentation

Mechanical characteristics of mollusk shells evaluated under static and dynamic loading conditions

Monday (16.03.2020)
17:50 - 17:53

The mollusk shells constitute a large group of biocomposite materials playing a key role in protecting of the animal against the predators. They consist of ~95% of brittle CaCO3 ceramic phase (either in calcite or aragonite crystallographic form) and ~5% of soft and ductile organic material. The outer part of the shells presents characteristic complex architecture containing prisms or lamellas arranged in the way that should secure withstanding a significant static and dynamic loading. Therefore, in the present work, the mechanical response of mollusk shells was evaluated through static and dynamic loading. The former were experiments performed through uniaxial static compression and nanohardness tests along two perpendicular loading directions, while the latter encompassed the dynamic indentation. In addition, before and after the mechanical tests, the microstructure observations were carried out with the help of SEM microscope in order to document the propagation of cracks under loading of mollusk shells.

The static loading in the uniaxial compression test proved a strong anisotropy in mechanical behavior of the shells. If the compression of the sample was performed on the section perpendicular to the shell growth direction a brittle cracking was observed, while an atypical shape of stress-strain curve was documented when a load was applied to the section parallel to the growth direction. In the static indentation experiment the cracks were formed near to the corners of the indents and propagated in the ceramic material to the organic phase where most of them stopped, as it was documented through SEM microstructure observations. It suggest that the layer of soft and ductile organic phase serves as an obstacle for crack propagation.

It is believed that thorough characterization of mollusk shells may be the first step for construction of synthetic materials imitating natural designs in order to achieve extraordinary mechanical properties.

Dr.-Ing. Lukasz Maj
Polish Academy of Sciences
Additional Authors:
  • Martyna Strąg
    Polish Academy of Sciences
  • Dr. Magdalena Bieda
    Polish Academy of Sciences
  • Dr. Kinga Nalepka
    AGH University of Science and Technology
  • Pawel Petrzak
    Polish Academy of Sciences
  • Dr. Anna Jarzebska
    Polish Academy of Sciences
  • Daniel Wojtas
    Polish Academy of Sciences
  • Dr. Katarzyna Berent
    AGH University of Science and Technology
  • Prof. Antonio Checa
    University of Granada
  • Prof. Krzysztof Sztwiertnia
    Polish Academy of Sciences


Category Short file description File description File Size
Poster Lukasz Maj - poster This is the file containing the poster entitled "Mechanical characteristics of mollusk shells evaluated under static and dynamic loading conditions" 1 MB Download
Poster 5 MB Download