@article{24383,
  author       = {{Wübbeke, Andrea and Schöppner, Volker and Arndt, Theresa and Maras, Jan-Ole and Fitze, Marcus  and Moltzahn, Christian  and Wu, Tao and Niendorf, Thomas}},
  journal      = {{Polymers}},
  publisher    = {{MDPI}},
  title        = {{{Effect of nucleating additives on short- and long-term tensile strength and residual stresses of welded polypropylene samples }}},
  year         = {{2021}},
}

@phdthesis{37632,
  author       = {{Wübbeke, Andrea}},
  title        = {{{Prozess-Struktur-Eigenschaftsbeziehung beim Heizelementschweißen von Polypropylen}}},
  year         = {{2021}},
}

@inproceedings{42892,
  abstract     = {{This paper presents the results of static short-term and long-term tensile tests for beta-nucleated joined polypropylene samples by the hot plate welding process. In the present study different dimensionless joining displacements are accounted for. The results show that high short-term tensile strength does not directly transfer to high long-term tensile strength. The morphology of the weld seam in the joined samples is examined by means of transmitted and reflected light microscopy. For the dimensionless joining displacements of 0.75 and 0.95, stretched spherulites are obtained. X-Ray diffraction can be used as a tool for qualitative and quantitative analysis and eventually for differentiation of samples of various joining displacements.}},
  author       = {{Wübbeke, Andrea and Schöppner, Volker and Paul, André and Tiemann, Michael and Austermeier, Laura and Fitze, Marcus and Chen, Mingie and Jakob, Fabian and Heim, Hans-Peter and Wu, Tao and Niendorf, Thomas and Röhricht, Marie-Luise and Schmidt, Michael}},
  booktitle    = {{SPE ANTEC 2020: The Virtual Edition 5 }},
  title        = {{{Long- and Short-Term Tensile Strength and Morphology of Joined Beta-Nucleated Polypropylene Parts}}},
  year         = {{2020}},
}

@inproceedings{24245,
  author       = {{Schöppner, Volker and Wübbeke, Andrea and Geißler, B. and Schmidt, M. and Maginer, A. and Wu, T. and Niendorf, T. and Jakob, F. and Heim, H.}},
  booktitle    = {{73rd Annual Assembly of the International Institute of Welding (IIW)}},
  location     = {{Marina Bay (Singapore)}},
  publisher    = {{Springer-Verlag}},
  title        = {{{Investigation of residual stresses of hot plate welding}}},
  year         = {{2020}},
}

@article{24236,
  abstract     = {{In diesem Artikel werden das Scherzugverhalten und der morphologische Zustand von konturgeschweißtem Polypropylen (PP) mit einem Massenanteil von 0,2% Ruß untersucht. Dabei zeigen die Ergebnisse ...}},
  author       = {{Schöppner, Volker and Wübbeke, Andrea and Schriegel, Fabian  and Paul, Andrej  and Tiemann, Michael and Geißler, Bastian  and Schmidt, Michael  and Magnier, Arnaud  and Niendorf, Thomas }},
  journal      = {{Joining Plastics}},
  pages        = {{30--35}},
  title        = {{{Selected Aspects for the Assessment of Laser Transmission Welding}}},
  year         = {{2020}},
}

@inproceedings{24472,
  author       = {{Schöppner, Volker and Wübbeke, Andrea and Paul, A. and Tiemann, M. and Austermeier, Laura and Fitze, M. and Chen, M. and Jakob, F. and Heim, H.-P- and Wu, T. and Niendorf, T. and Röhricht, M.-L. and Schmidt, M.}},
  booktitle    = {{ANTEC20}},
  location     = {{Texas (USA)}},
  title        = {{{LONG- AND SHORT-TERM TENSILE STRENGTH AND MORPHOLOGY OF JOINED BETA-NUCLEATED POLYPROPYLENE PARTS}}},
  year         = {{2020}},
}

@inproceedings{25641,
  abstract     = {{Langzeitfestigkeit von Schweißungen aus PP unter Berücksichtigung der Morphologie}},
  author       = {{Schöppner, Volker and Wübbeke, Andrea and Paul, Andre and Tiemann, Michael and Fitze, F. and Austermeier, Laura and Chen, M. and Jakob, F. and Heim, H.-P. and Wu, T. and Niendorf, T. and Röhricht, M-L. and Schmidt, M.}},
  booktitle    = {{Werkstoffwoche (2019)}},
  location     = {{Dresden (Deutschland)}},
  title        = {{{Langzeitfestigkeit von Schweißungen aus PP unter Berücksichtigung der Morphologie}}},
  year         = {{2019}},
}

@article{26932,
  author       = {{Schöppner, Volker and Lakemeyer, Patrick and Geißler, Bastian and Laumer, Tobias and Wübbeke, Andrea and Frick, Thomas}},
  journal      = {{Journal of Laser Applications}},
  title        = {{{Analysis of the interaction between the temperature field and the weld seam morphology in laser transmission welding by using two different discrete laser wavelengths}}},
  volume       = {{30. Jg.}},
  year         = {{2018}},
}

@article{26933,
  author       = {{Schöppner, Volker and Wübbeke, Andrea and Geißler, B. and Laumer, T. and Frick, T. and Schmidt, M.}},
  journal      = {{Manuf. Sci. Eng}},
  pages        = {{140(11)}},
  title        = {{{Analysis of the weld seam morphology of polypropylene in laser transmission welding}}},
  year         = {{2018}},
}

@inproceedings{27220,
  author       = {{Schöppner, Volker and Lakemeyer, P. and Wübbeke, Andrea and Geißler, S. and Schmidt, M.}},
  booktitle    = {{70th Annual Assembly of the International Institute of Welding (IIW)}},
  location     = {{Shanghai (China)}},
  title        = {{{Investigation of Residual Stress in Laser Transmission Welding of Polypropylene}}},
  year         = {{2017}},
}