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FOR5250 SP-3: TPMS lattice structures for implants

Mechanism-based characterization of the fatigue and corrosion fatigue properties of addtively manufactured TPMS lattice structures under physiological conditions



Aim of the research unit will be the development and validation of an integrated solution for the manufacturing, characterization and simulation-based design of additively manufactured implants in maxillofacial surgery, taking into account physiological conditions of the individual bone situation. Therefore, a holistic qualification approach, as well as an interdisciplinary consideration of materials science and engineering, medical engineering and numeric simulation, is required. Based on this, novel and mechanism-based in vitro and in vivo testing methods, including multi-scale simulation and modeling methods (in silico), are implemented by the interdisciplinary consortium in order to describe the mechanical, biological and corrosive processes and their interactions. Due to the present diversity and complexity of the envisaged research topic, interdisciplinary processing by young scientists, supervised by proven researchers, is mandatory.

Duration: 2022 - 2026

Consortium: 8 Research Institutes


Subproject 3 (SP-3): Mechanism-based characterization of the fatigue and corrosion fatigue properties of addtively manufactured TPMS lattice structures under physiological conditions

The overall objective of the subproject is the holistic characterization   of the microscopic and mechanical deformation and damage behavior  under cyclic loading as well as corrosive exposure of coated Ti-6Al-4V  lattice structures manufactured by means of PBF-LB/M. Due to the   complex scenario, the loading conditions will be first regarded   separately and later on collectively in order to detect the dominant   mechanisms, respectively. After determining the influence of the PBF-  LB/M process parameters through performing time-efficient corrosion   and quasi-static tests, an optimal parameter set is defined which is   used for manufacturing of simplified 2D geometries based on triply   periodic minimal surfaces (TPMS). Resulting from the fatigue strength  and the cyclic damage mechanisms in air, a favored 2D lattice type   will be selected for further characterization of the coating with regard   to the load capacity and the corrosive properties. The aim is to   establish an extensive understanding of the mechanical and corrosive  properties for the simplified 2D geometry which will then be   transferred towards 3D lattice structures. To characterize the   application-oriented damage behavior, in-vitro corrosion fatigue tests   for 3D lattice structures will be conducted. Further on, the mechanical   behavior of the bone/implant interface (ex vivo) is characterized and   stiffness mismatches (stress shielding) are quantified.

Location & approach

The campus of TU Dort­mund University is located close to interstate junction Dort­mund West, where the Sauerlandlinie A45 (Frankfurt-Dort­mund) crosses the Ruhrschnellweg B1/A40. The best interstate exit to take from A45 is "Dort­mund-Eichlinghofen (6)" (closer to Campus Süd), and from B1/A40 "Dort­mund-Barop (44)" (closer to Campus Nord). Signs for the uni­ver­si­ty are located at both exits. Follow the signs towards Campus-Süd.

The Chair of Materials Test Engineering (WPT) is located in the "Maschinenbau III" building, which can be reached via entrance 41, where parking spaces are available. The secretariat is located on the third floor in E 03 - room 3.027.

For the approach to the TU Dort­mund University you will find the navigation on Google Maps.

Address for navigation devices:

Baroper Straße 303

D-44227 Dortmund

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TU Dort­mund University has its own train station ("Dort­mund Uni­ver­si­tät"). From there, suburban trains (S-Bahn) leave for Dort­mund main station ("Dort­mund Hauptbahnhof") and Düsseldorf main station via the "Düsseldorf Airport Train Station" (take S-Bahn number 1). The uni­ver­si­ty is easily reached from Bochum, Essen, Mülheim an der Ruhr and Duisburg. From there, Campus Süd, where the Department of Materials Test Engineering (WPT) is located, can be reached in five minutes via the H-Bahn in the direction of "Eichlinghofen" or "Campus Süd".

After leaving the H-Bahn station "Campus Süd" cross the small street and go straight forward. Take the stairs (elevator on the left side).
Turn right directly under the canopy, go approximately 200 m, the Building "Maschinenbau III" is at the end of the path.

The office is located on the third floor in E03 - room 3.027.

Dortmund's public transport company DSW21 offers an interactive route network map with timetable information.

The AirportExpress is a fast and convenient means of transport from Dort­mund Airport (DTM) to Dort­mund Central Station, taking you there in little more than 20 minutes. From Dort­mund Central Station, you can continue to the uni­ver­si­ty campus by interurban railway (S-Bahn). A larger range of in­ter­na­tio­nal flight connections is offered at Düsseldorf Airport (DUS), which is about 60 kilometres away and can be directly reached by S-Bahn from the uni­ver­si­ty station.

The H-Bahn is one of the hallmarks of TU Dort­mund University. There are two stations on Campus Nord. One ("Dort­mund Uni­ver­si­tät S") is directly located at the suburban train stop, which connects the uni­ver­si­ty directly with the city of Dort­mund and the rest of the Ruhr Area. Also from this station, there are connections to the "Technologiepark" and (via Campus Süd) Eichlinghofen. The other station is located at the dining hall at Campus Nord and offers a direct connection to Campus Süd every five minutes.

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