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.

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Digital Toughening: Miming nacre-like structures via 3D-printing

Wednesday (18.03.2020)
11:30 - 11:50

Additive manufacturing (AM) has been a hot topic in various fields of application for the past decades. While most discussions go on about what technologies to substitute with AM, the more general question should be how to use its qualities for enhancing the manufacturing possibilities. In contrast to the obvious advantages of 3D printing, such as nearly unlimited freedom of design, less waste material and just-in-time production, the weak points of most commercially available AM technologies are the mechanical properties of the printed parts. Especially photopolymers, which are used for stereolithography (SL), are rather brittle. Looking into nature, one can find different strategies to overcome the lack of toughness of certain materials and structures. Shells of marine animals, as an example, often consist of complex organic/inorganic structures, which form materials of extraordinary toughness. The different phases on their own often show poor mechanical properties, whereas the combination exhibits tough behavior. By varying the Young’s Modulus of the separate phases, crack propagation can be hindered. Up to now, it has not been possible to copy those materials in a larger scale. We took the hierarchical structure of nacre as an example and built a hybrid printing system, consisting of a SL-unit and an inkjet printhead. Using the layer-by-layer approach of 3D printing, the goal was to mimic the nacre structure of brittle platelets, separated by soft, thin layers of organic material. To achieve this, a brittle matrix material is cured via a stereolithography process. An inkjet printhead then selectively places droplets of an elastomeric material in between those layers. In first studies with different acrylic polymer materials, we could show, that introducing those thin discrete layers of softer material lead to a significant increase in impact strength and toughness, 40% and 50% respectively, compared to the plain matrix material. In this study, we are evaluating the possibilities for ceramic/composite materials where the matrix material is highly filled with up to 54 vol. % of ceramic powder. In a first approach, tricalcium phosphate (TCP) and calcium carbonate are used as filler materials. With this, is possible to further imitate the organic/inorganic structure of nacre, and build up parts beyond the micro scale.

Additional Authors:
  • Prof. Dr. Jürgen Stampfl
    TU Wien