Michael Schweigler

Michael Schweigler

Senior lecturer
Department of Building Technology Faculty of Technology
michael.schweigler@lnu.se
+46 470-70 83 54
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As senior lecturer I aim for a balance between research activities, teaching and supervision tasks.

Teaching and research areas incorporate different disciplines related to the topic of wood mechanics and timber engineering. My core competency is a balanced knowledge base in experimental and numerical methods in mechanics, applied to the sustainable material wood. A knowledge base which I built-up during my research activities as PhD-student at the Vienna University of Technology (TU Wien), and is now extended and strengthen here at the Department of Building Technology at Linnaeus University. My doctoral thesis was dedicated to a combined experimental-numerical study on dowel joints in timber structures. A work which is resumed here at Linnaeus University and applied to new connection systems and wood products. Beside research it was and still is for me of highest relevance to transfer knowledge from science to industrial partners, our students and to the community.

Teaching

Teaching activities are to a large extend related to the material wood. Thanks to a profound knowledge in wood mechanics, timber engineering and software supported design of structures, gained from research and previous teaching activities in the area of timber engineering, I can support colleagues in various courses at the undergraduate and graduate level, as well as in professional training. Among others these courses are: Building Technology, Water Supply and Wastewater Technology, Steel and Timber structures, Project work in detailed design, Professional training in Cross-laminated Timber structures. In addition, I am responsible together with a colleague for the master course Conceptual Structural Design. Furthermore, my academia work comprises supervision of Bachelor, Master and PhD-students.

Research

My research is dedicated to experimental investigation and numerical modeling of wood and timber structures at different length scales, with a strong focus on connections in timber structures. This comprises combined experimental-numerical studies on wood materials, connection components, single-fastener connections, multiple-fastener joints, and analysis of timber structures. Advanced experimental and numerical methods of mechanics are used in scientific work to understand phenomena resulting in a deep knowledge on materials and structural systems, which are then used to develop engineering tools being applicable in building practice. This is achieved by close cooperation with industry partners, working groups related to standardization, and software developers. The aim of these cooperation philosophy is to combine scientific knowledge with practical experience, to achieve based on advanced numerical modeling, new enhanced design methods to facilitate timber structures as important part for a sustainable future.

Research profile

My research groups

My ongoing research projects

My completed research projects

Publications

Article in journal (Refereed)

Conference paper (Refereed)

Chapter in book (Refereed)

Dataset (Refereed)

  • Schweigler, M., Bader, T.K., Bocquet, J., Lemaitre, R., Sandhaas, C. (2019). Database of embedment parameters from soft- and hardwoods. Växjö, Sweden, Linnaeus University.

    The database includes embedment parameters from in total 1565 tests, taken from 7 reports originating from ENSTIB/LERMaB Epinal, Vienna University of Technology (IMWS, TU Wien), Linnaeus University Växjö (LNU), TU Delft and Karlsruhe Institute of Technology (KIT).It compromises parameters from embedment test on 6 soft- and hardwood spieces, 4 wood-based products, 4 dowel diameter, loaded at 7 different load-to-grain angles.

    The embedment parameters can be used to describe load-displacement curves of steel dowels embedded in wood, being exploited in numerical models for single-dowel connections.

    Embedment parameters given in the database are explained and discussed in:Schweigler, M., T. K. Bader, J.F. Bocquet, and C. Sandhaas (2019). "Embedment test analysis and data in the context of phenomenological modeling for dowelled timber joint design." In: Proceedings of INTER/52-07-08 , Tacoma, USA.

    Update:2020-07-06: Parameters from embedment tests on birch (solid timber) are added Benistand, T. (2020).

    References:

    The database includes embedment parameters taken from following reports:

    Benistand, T. (2019). “Comportements structurels des Essences de bois feuillus français en vue de leur meilleure intégration aux Eurocodes 5.” PhD thesis. University of Lorraine, France (in progress).

    Benistand T, Bleron L., Bocquet J.F (2020) " Embedding Strength Prediction for European Hardwood Species" In: Proceedings INTER/53-07-9.

    Blaß, H. J. and T. Uibel (2007). “Tragfähigkeit von stiftförmigen Verbindungsmitteln in Brettsperrholz (in German)”. In: Karlsruher Berichte zum Ingenieurholzbau Band 8.

    Lemaître, R. (2020). “Développement d’un outil de calcul non linéaire de dimensionnement d’assemblages bois tridimensionnels soumis à des torseurs plans.” PhD thesis. University of Lorraine, France.

    Sandhaas, C., G.J.P. Ravenshorst, H.J. Blass, and J.W.G. van de Kuilen (2013). “Embedment tests parallel-to-grain and ductility aspects using various wood species”. In: European Journal of Wood and Wood Products 71(5), pp. 599–608.

    Schweigler, M., T. K. Bader, G. Hochreiner, G. Unger, and J. Eberhardsteiner (2016). “Load-to-grain angle dependence of the embedment behavior of dowel-type fasteners in laminated veneer lumber”. In: Construction and Building Materials 126, pp. 1020–1033.

    Schweigler, M., T. K. Bader, J. Vessby, and J. Eberhardsteiner (2017). “Constrained displacement boundary conditions in embedment testing of dowel-type fasteners in LVL”. In: Strain 53(6). DOI: 10.1111/str.12238.

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Conference paper (Other academic)

Doctoral thesis, monograph (Other academic)

Report (Other academic)