Overview of fatigue life assessment of baffles in Wendelstein 7-X
作者： Joris Fellinger , Roberto Citarella , Venanzio Giannella , Marcello Lepore , Raffaele Sepe
DOI: 10.1016/J.FUSENGDES.2018.02.011
关键词: Baffle 、 Mechanical load 、 Heat shield 、 Finite element method 、 Paris' law 、 Stress intensity factor 、 Wendelstein 7-X 、 Composite material 、 Materials science 、 Bending
摘要: Abstract Wendelstein 7-X (W7-X), the world’s largest nuclear fusion experiment of modular stellarator type, started operation in 2015 and will be upgraded with a water cooled first wall for steady state 2020. The consists CFC armored island divertors, adjacent baffles, heat shields, stainless steel panels. Baffle shield segments consist graphite tiles, bolted low pre-stress onto sinks CuCrZr that are turn brazed pipes. Cracks were detected before installation baffles root seam over 100 locations. Such cracks attributed to imposed plastic deformation pipes bring them into final shape following complex 3D geometry plasma vessel. This paper gives an overview experimental numerical work using finite element method (FEM) dual boundary (DBEM), including sub-modeling assess risk leak during operation. Details is published Giannella et al. (2017), Lepore (2017) Citarella (2018). First fatigue crack growth experiments carried out on pipe material thermal-mechanical predictions made FEM DBEM. It appeared Stress Intensity Factor (SIF) threshold ductile only reached when large strains occur, thus violating field application linear elastic fracture mechanics forecast growth. Afterwards, representative samples manufactured subjected initial causing 11 12 samples. Some tested up 60,000 bending load cycles. Two four failed after ∼35,000 Before test, was measured computer tomography scans. Equivalence between thermal W7-X mechanical cyclic test determined models allow prediction life W7X. Additional modeling showed also zones away from can limit life.
core.ac.uk
mpg.de
unisa.it参考文章(5)
H Greuner, B Böswirth, J Boscary, G Hofmann, B Mendelevitch, H Renner, R Rieck, Final design of W7-X divertor plasma facing components—tests and thermo-mechanical analysis of baffle prototypes symposium on fusion technology. ,vol. 66, pp. 447- 452 ,(2003) , 10.1016/S0920-3796(03)00193-5
Jean-Louis Chaboche, Jean Lemaitre, Mechanics of Solid Materials ,(1990)
Hans-Stephan Bosch, V. Bykov, R. Brakel, P. van Eeten, J.-H. Feist, M. Gasparotto, H. Grote, T. Klinger, M. Nagel, D. Naujoks, G.H. Neilson, T. Rummel, J. Schacht, R. Vilbrandt, L. Wegener, A. Werner, Experience with the commissioning of the superconducting stellarator Wendelstein 7-X symposium on fusion technology. ,vol. 96, pp. 22- 27 ,(2015) , 10.1016/J.FUSENGDES.2015.05.010
R. Citarella, , V. Giannella, M. A. Lepore, J. Fellinger, FEM-DBEM approach to analyse crack scenarios in a baffle cooling pipe undergoing heat flux from the plasma Materials 2017, Vol. 4, Pages 391-412. ,vol. 4, pp. 391- 412 ,(2017) , 10.3934/MATERSCI.2017.2.391
RC Wolf, Anwaar Ali, Arturo Alonso, Jürgen Baldzuhn, Craig Beidler, Marc Beurskens, C Biedermann, H-S Bosch, S Bozhenkov, Rudolf Brakel, Andreas Dinklage, Yühe Feng, Golo Fuchert, Joachim Geiger, Olaf Grulke, P Helander, Matthias Hirsch, Udo Höfel, Marcin Jakubowski, Jens Knauer, Gabor Kocsis, Ralf König, Petra Kornejew, A. Krämer-Flecken, Maciej Krychowiak, Matt Landreman, Andreas Langenberg, Heinrich-Peter Laqua, S Lazerson, H Maaßberg, Stefan Marsen, M Marushchenko, Dmitry Moseev, Holger Niemann, Novimir Pablant, Ekkehard Pasch, Kian Rahbarnia, G Schlisio, Torsten Stange, T Sunn Pedersen, Jakob Svensson, Tamas Szepesi, H Trimino Mora, Yuriy Turkin, Tom Wauters, Gavin Weir, Uwe Wenzel, Thomas Windisch, Glen Wurden, Daihong Zhang, Ivana Abramovic, S Äkäslompolo, Pavel Aleynikov, Ksenia Aleynikova, Robertas Alzbutas, Gabor Anda, Tamara Andreeva, Enrique Ascasibar, J Assmann, S-G Baek, Martin Banduch, Tullio Barbui, M Barlak, Kristin Baumann, W Behr, Andree Benndorf, O Bertuch, Wolfgang Biel, Dietrich Birus, Boyd Blackwell, Emilio Blanco, Marko Blatzheim, Torsten Bluhm, Daniel Böckenhoff, Peter Bolgert, Matthias Borchardt, V Borsuk, J Boscary, L-G Böttger, H Brand, Ch Brandt, Torsten Bräuer, Harald Braune, S Brezinsek, K-J Brunner, B Brünner, Rainer Burhenn, Birger Buttenschön, Victor Bykov, Ivan Calvo, B Cannas, Alvaro Cappa, Andre Carls, L Carraro, B Carvalho, Francisco Castejon, A Charl, F Chernyshev, Mark Cianciosa, R Citarella, G Claps, M Cole, MJ Cole, F Cordella, G Cseh, A Czarnecka, A Czermak, K Czerski, M Czerwinski, G Czymek, A Da Molin, A Da Silva, G Dammertz, J Danielson, Angel De La Pena, Sven Degenkolbe, P Denner, DP Dhard, Marion Dostal, Michael Drevlak, P Drewelow, Ph Drews, Andrzej Dudek, G Dundulis, Frederic Durodie, P Van Eeten, Florian Effenberg, G Ehrke, Michael Endler, D Ennis, E Erckmann, H Esteban, Teresa Estrada, Nils Fahrenkamp, J-H Feist, Joris Fellinger, H Fernandes, WH Fietz, Waldemar Figacz, J Fontdecaba, Oliver Ford, Tomasz Fornal, Heinke Frerichs, A Freund, M Führer, T Funaba, A Galkowski, G Gantenbein, Y Gao, J García Regaña, None, Major results from the first plasma campaign of the Wendelstein 7-X stellarator Nuclear Fusion. ,vol. 57, pp. 102020- ,(2017) , 10.1088/1741-4326/AA770D