Person

Dr.-Ing.

Johannes Lohmar

Senior Engineer - Flat & Long Products, Materials Modelling

Institute of Metal Forming

Address

Room: 101

Intzestraße 10

52072 Aachen

Contact

WorkPhone
Phone: +49 241 80 95934
Fax Fax: +49 241 80 92234
 

Publications

Source Author(s)
[Journal Article]
Modeling and exploiting the strip tension influence on surface imprinting during temper rolling of cold-rolled steel
In: Advances in industrial and manufacturing engineering, 3, 100045, 2021
[DOI: 10.1016/j.aime.2021.100045]
Li, Xinyang (Corresponding author)
Schulte, Christopher
Abel, Dirk
Teller, Marco
Hirt, Gerhard
et al.
[Journal Article]
FepiM : A Novel Inverse Piecewise Method to Determine Isothermal Flow Curves for Hot Working
In: Metals : open access journal, 11 (4), 602, 2021
[DOI: 10.3390/met11040602]
Vuppala, Aditya Shiv Kanth (Corresponding author)
Krämer, Alexander Maximilian
Lohmar, Johannes
Hirt, Gerhard
[Journal Article]
Limits to making L-shape ring profiles without ring growth
In: Journal of materials processing technology, 292, 117062, 2021
[DOI: 10.1016/j.jmatprotec.2021.117062]
Cleaver, Christopher John (Corresponding author)
Lohmar, Johannes
Tamimi, Saeed
[Contribution to a conference proceedings, Journal Article]
A New Inverse Explicit Flow Curve Determination Method for Compression Tests
In: Procedia manufacturing, 47, 824-830, 2020
Vuppala, Aditya shiv Kanth (Corresponding author)
Krämer, Alexander Maximilian
Braun, Alexander
Lohmar, Johannes
Hirt, Gerhard
[Contribution to a conference proceedings, Journal Article]
Design of Caliber Rolls Incorporating Load Path Dependent Damage Evolution
In: Procedia manufacturing, 47, 643-648, 2020
Li, Xinyang (Corresponding author)
Wang, Shuhan
Lohmar, Johannes
Hirt, Gerhard
[Contribution to a conference proceedings, Journal Article]
Prediction of Ductile Damage in the Process Chain of Caliber Rolling and Forward Rod Extrusion
In: Procedia manufacturing, 47, 649-655, 2020
Clausmeyer, Till (Corresponding author)
Schowtjak, Alexander
Wang, Shuhan
Gitschel, Robin
Hering, Oliver
et al.
[Journal Article]
The influence of constraint rolls on temperature evolution and distribution in radial ring rolling
In: Journal of materials processing technology, 282, 116663, 2020
[DOI: 10.1016/j.jmatprotec.2020.116663]
Lohmar, Johannes (Corresponding author)
Cleaver, Christopher J.
Allwood, Julian M.
[Journal Article]
Characterization of High-Strength Packaging Steels : Obtaining Material Data for Precise Finite Element Process Modelling
In: Metals : open access journal, 10 (12), 1683, 2020
[DOI: 10.3390/met10121683]
Knieps, Fabian (Corresponding author)
Liebscher, Benjamin
Moldovan, Ioana
Köhl, Manuel
Lohmar, Johannes
[Contribution to a conference proceedings, Journal Article]
Simulation-as-a-Service for Reinforcement Learning Applications by Example of Heavy Plate Rolling Processes
In: Procedia manufacturing, 51, 897-903, 2020
[DOI: 10.1016/j.promfg.2020.10.126]
Scheiderer, Christian (Corresponding author)
Thun, Timo
Idzik, Christian
Posada-Moreno, Andrés Felipe
Krämer, Alexander Maximilian
et al.
[Contribution to a conference proceedings, Journal Article]
Prediction of Ductile Damage in the Process Chain of Caliber Rolling and Forward Rod Extrusion
In: Procedia manufacturing, 47, 649-655, 2020
[DOI: 10.1016/j.promfg.2020.04.201]
Clausmeyer, Till (Corresponding author)
Schowtjak, Alexander
Wang, Shuhan
Gitschel, Robin
Hering, Oliver
et al.
[Contribution to a conference proceedings, Journal Article]
Design of Caliber Rolls Incorporating Load Path Dependent Damage Evolution
In: Procedia manufacturing, 47, 643-648, 2020
[DOI: 10.1016/j.promfg.2020.04.198]
Li, Xinyang (Corresponding author)
Wang, Shuhan
Lohmar, Johannes
Hirt, Gerhard
[Contribution to a conference proceedings, Journal Article]
A New Inverse Explicit Flow Curve Determination Method for Compression Tests
In: Procedia manufacturing, 47, 824-830, 2020
[DOI: 10.1016/j.promfg.2020.04.257]
Vuppala, Aditya shiv Kanth (Corresponding author)
Krämer, Alexander Maximilian
Braun, Alexander
Lohmar, Johannes
Hirt, Gerhard
[Contribution to a book, Journal Article]
Prediction and analysis of damage evolution during caliber rolling and subsequent cold forward extrusion
In: Production engineering, 14 (1), 33-41, 2019
[DOI: 10.1007/s11740-019-00935-x]
Schowtjak, Alexander (Corresponding author)
Wang, Shuhan
Hering, Oliver
Clausmeyer, Till
Lohmar, Johannes
et al.
[Contribution to a book, Journal Article]
Torsion plastometer trials to investigate the effect of non-proportional loading paths in caliber rolling on damage and performance of metal parts
In: Production engineering, 14 (1), 17-32, 2020
[DOI: 10.1007/s11740-019-00949-5]
Wang, Shuhan (Corresponding author)
Dunlap, Anthony
Möhring, Kerstin
Lohmar, Johannes
Schwedt, Alexander
et al.
[Journal Article]
Evaluation of process-induced damage based on dynamic recrystallization during hot caliber rolling
In: Production engineering, 14 (1), 5-16, 2019
[DOI: 10.1007/s11740-019-00932-0]
Imran, Muhammad (Corresponding author)
Afzal, Muhammad Junaid
Buhl, Johannes
Bambach, Markus
Dunlap, Anthony
et al.
[Contribution to a book, Journal Article]
Potential and status of damage controlled forming processes
In: Production engineering, 14 (1), 1-4, 2020
[DOI: 10.1007/s11740-019-00948-6]
Hirt, Gerhard (Corresponding author)
Tekkaya, A. Erman
Clausmeyer, Till
Lohmar, Johannes
[Contribution to a book, Journal Article]
Modelling of void healing in hot rolling due to recrystallization
In: Production engineering, 14 (1), 43-52, 2019
[DOI: 10.1007/s11740-019-00938-8]
Li, Xinyang (Corresponding author)
Liebsch, Conrad
Hirt, Gerhard
Lohmar, Johannes
[Contribution to a book, Journal Article]
Investigation on the influence of damage on the fatigue strength of hot rolled sheet metal
In: Production engineering, 14 (1), 65-75, 2019
[DOI: 10.1007/s11740-019-00933-z]
Liebsch, Conrad (Corresponding author)
Möhring, Kerstin
Lohmar, Johannes
Walther, Frank
Hirt, Gerhard
[Contribution to a book, Contribution to a conference proceedings]
Influence of process conditions and pore morphology on the closure rate of pores in hot rolling of steel
In: NUMIFORM 2019: The 13th International Conference on Numerical Methods in Industrial Forming Processes : proceedings : Portsmouth, New Hampshire, USA, June, 271-274, 2019
Liebsch, Conrad (Corresponding author)
Li, Xinyang
Lohmar, Johannes
Hirt, Gerhard
[Contribution to a conference proceedings]
Fe-based Sensitivity Analysis of Flatness in Hot Heavy Plate Leveling
In: [11th International Rollling Conference, IRC 2019, 2020-10-01 - 2020-10-04, Sao Paulo, Brasilien], 292,300, 2019
[DOI: 10.5151/9785-9785-32259]
Laugwitz, Marvin (Corresponding author)
Jochum, Martin
Scheffer, Tobias
Wild, Daniel
Hirt, Gerhard
et al.
[Contribution to a book, Contribution to a conference proceedings]
Effiziente Richtstrategien basierend auf Data-Mining und Modellierung
In: Ideen Form geben : 33. ASK Umformtechnik, 28.-29. März 2019, Eurogress Aachen : Tagungsband / Gerhard Hirt (Hrsg.), 245-254, 2019
Laugwitz, Marvin (Corresponding author)
Lohmar, Johannes
Hirt, Gerhard
Jochum, Martin
Scheffer, Tobias
et al.
[Journal Article]
Vollautomatische Charakterisierung der Ebenheit von Grobblech
In: Stahl und Eisen, 138 (10), 39-44, 2018
Laugwitz, Marvin (Corresponding author)
Lohmar, Johannes
Hirt, Gerhard
Seuren, Simon
Jochum, Martin
[Journal Article]
Improving the thickness accuracy of cold rolled narrow strip by piezoelectric roll gap control at high rolling speed
In: CIRP annals, manufacturing technology, 67 (1), 313-316, 2018
[DOI: 10.1016/j.cirp.2018.04.107]
Stockert, Sven Matthias (Corresponding author)
Wehr, Matthias
Lohmar, Johannes
Hirt, Gerhard
Abel, Dirk
[Book, Dissertation / PhD Thesis]
Untersuchungen zur inversen Identifikation der Parameter von Materialmodellen für das Grobblechwalzen
In: Umformtechnische Schriften 189, 2018
Lohmar, Johannes
[Contribution to a book, Contribution to a conference proceedings]
Flatness characterisation of hot plates for plate levelling
In: European Steel Technology and Application Days 2017 - ESTAD 2017 : Monday 26 June 2017-Thursday 29 June 2017 : proceedings / ASMET, The Austrian Society for Metallurgy and Materials, 2097-2103, 2017
Laugwitz, Marvin (Corresponding author)
Seuren, Simon
Jochum, Martin
Lohmar, Johannes
Hirt, Gerhard
[Contribution to a conference proceedings, Journal Article]
Development of levelling strategies for heavy plates via controlled FE models
In: Procedia engineering, 207, 1349-1354, 2017
[DOI: 10.1016/j.proeng.2017.10.895]
Laugwitz, Marvin (Corresponding author)
Seuren, Simon
Jochum, Martin
Hojda, Stephan
Lohmar, Johannes
et al.
[Contribution to a conference proceedings, Journal Article]
Investigations on Springback in High Manganese TWIP-Steels using U-Profile Draw Bending
In: Procedia engineering, 207, 1582-1587, 2017
[DOI: 10.1016/j.proeng.2017.10.1052]
Quadfasel, Angela (Corresponding author)
Lohmar, Johannes
Hirt, Gerhard
[Contribution to a book, Contribution to a conference proceedings]
Assessment of Flat Rolling Theories for the Use in a Model-Based Controller for High-Precision Rolling Applications
In: Proceedings of the 20th International ESAFORM Conference on Material Forming : ESAFORM 2017 : Dublin, Ireland, 26-28 April 2017 / editors: Dermot Brabazon, Sumsun Naher, Inam Ul Ahad. - B, 190005, 1-6, 2017
[DOI: 10.1063/1.5008218]
Stockert, Sven Matthias (Corresponding author)
Wehr, Matthias
Lohmar, Johannes
Abel, Dirk
Hirt, Gerhard
[Contribution to a book, Contribution to a conference proceedings]
Influence of transient strain rates on material flow stress and microstructure evolution
In: Proceedings of the 20th International ESAFORM Conference on Material Forming : ESAFORM 2017 : Dublin, Ireland, 26-28 April 2017 / editors: Dermot Brabazon, Sumsun Naher, Inam Ul Ahad. - B, 160004, 1-6, 2017
[DOI: 10.1063/1.5008179]
Dierdorf, Jens (Corresponding author)
Lohmar, Johannes
Hirt, Gerhard
[Contribution to a book, Contribution to a conference proceedings]
Model for texture evolution in cold rolling of 2.4 wt.-% Si non-oriented electrical steel
In: Proceedings of the 20th International ESAFORM Conference on Material Forming : ESAFORM 2017 : Dublin, Ireland, 26-28 April 2017 / editors: Dermot Brabazon, Sumsun Naher, Inam Ul Ahad. - B, 170005, 1-6, 2017
[DOI: 10.1063/1.5008203]
Wei, Xuefei (Corresponding author)
Hojda, Stephan
Dierdorf, Jens
Lohmar, Johannes
Hirt, Gerhard
[Contribution to a book, Contribution to a conference proceedings]
Untersuchungen zur Verbindungsentstehung beim Warmwalzplattieren von Aluminium
In: Ideen Form geben : 31. ASK Umformtechnik, 10.-11. März 2016, Eurogress Achen ; Tagungsband / Gerhard Hirt (Hrsg.) ; Institut für Bildsame Formgebung - Institut für Eisenhüttenkunde, Rheinisch-Westfälische Technische Hochschule Aachen, 207-216, 2016
Karhausen, Kai Friedrich (Corresponding author)
Janssen, Hartmut Georg
Pietryga, Michael P.
Lohmar, Johannes
Hirt, Gerhard
[Contribution to a book, Contribution to a conference proceedings]
Investigation of Springback of High Manganese TWIP-Steels Using Three-Point-Bending
In: Proceedings of the 1st International Conference on Automobile Steel(ICAS 2016) & the 3rd International Conference on High Manganese Steels (HMnS) : Chengdu, China, November 16-18, 2016 / organized by the Chinese Society for Metals, Central Iron and Steel Research Institute, 2016
Quadfasel, Angela (Corresponding author)
Lohmar, Johannes
Hirt, Gerhard
[Contribution to a book, Journal Article]
Investigation on Hardening and Softening Behavior of Steel after Rapid Strain Rate Changes
In: Key engineering materials : KEM, 716, 121-128, 2016
[DOI: 10.4028/www.scientific.net/KEM.716.121]
Dierdorf, Jens (Corresponding author)
Lohmar, Johannes
Hirt, Gerhard
[Contribution to a book, Contribution to a conference proceedings, Journal Article]
Extended Conical Tube-Upsetting Test to Investigate the Evolution of Friction Conditions
In: Key engineering materials, 716, 157-164, 2016
[DOI: 10.4028/www.scientific.net/KEM.716.157]
Teller, Marco (Corresponding author)
Klubakov, Alexej
Franzke, Martin
Lohmar, Johannes
Hirt, Gerhard
[Contribution to a book, Contribution to a conference proceedings]
Precise Prediction of Microstructure Properties with Minimal Experimental Effort for the Nickel-Base Alloy Inconel 718
In: [WGP Congress 2016 / Edited by Jens P. Wulfsberg, Marc Fette, Tobias Montag], 43-50, 2016
[DOI: 10.4028/www.scientific.net/AMR.1140.43]
Krämer, Alexander (Corresponding author)
Lohmar, Johannes (Corresponding author)
Hirt, Gerhard (Corresponding author)
[Contribution to a book, Contribution to a conference proceedings]
Development of a Laser Triangulation Gauge for High Precision Strip Thickness Control
In: [ WGP Congress 2016 / Edited by Jens P. Wulfsberg, Marc Fette, Tobias Montag], 107-114, 2016
[DOI: 10.4028/www.scientific.net/AMR.1140.107]
Stockert, Sven (Corresponding author)
Wehr, Matthias (Corresponding author)
Lohmar, Johannes (Corresponding author)
Hirt, Gerhard (Corresponding author)
Abel, Dirk (Corresponding author)
[Contribution to a book, Contribution to a conference proceedings]
Crystal plasticity finite element analysis of texture evolution during cold rolling of a non-oriented electrical steel
In: 10th International Rolling Conference and the 7th European Rolling Conference : June 6-9, 2016 Graz, Austria / organised by ASMET - The Austrian Society for Metallurgy and Materials ; chairman: Bruno Buchmayr (Montanuniversitaet Loeben), 494-504, 2016
Wei, Xuefei
Hojda, Stephan
Dierdorf, Jens
Lohmar, Johannes
Hirt, Gerhard
[Contribution to a book, Contribution to a conference proceedings, Journal Article]
A New FE-Model for the Investigation of Bond Formation and Failure in Roll Bonding Processes
In: Materials science forum, 854, 152-157, 2016
Pietryga, Michael P. (Corresponding author)
Lohmar, Johannes
Hirt, Gerhard
[Contribution to a book, Contribution to a conference proceedings]
Using Data Sampling and Inverse Optimization for the Reduction of the Experimental Effort in the Characterization of Hot Working Behaviour for a Case Hardening Steel
In: Material Forming : ESAFORM 2015 / edited by Aldo Ofenheimer, Cecilia Poletti, Daniela Schalk-Kitting and Christof Sommitsch, 1351-1356, 2015
[DOI: 10.4028/www.scientific.net/KEM.651-653.1351]
Krämer, Alexander M. (Corresponding author)
Lohmar, Johannes
Bambach, Markus
Hirt, Gerhard
[Contribution to a book, Contribution to a conference proceedings]
The inverse determination of material parameters for hot plate rolling exclusively from rolling mill data
In: Proceedings / METEC & 2nd ESTAD 2015, European Steel Technology and Application Days : Düsseldorf, Germany, CCD Congress Center Düsseldorf, 15 - 19 June 2015 / host and organizer: Steel Institute VDEh, 2015
Lohmar, Johannes (Corresponding author)
Bambach, Markus
Hirt, Gerhard
Seuren, Simon
[Journal Article]
A new method to determine isothermal flow curves for integrated process and microstructural simulation in metal forming
In: International journal of material forming, 8 (1), 59-66, 2013
[DOI: 10.1007/s12289-013-1147-6]
Xiong, Wei (Corresponding author)
Lohmar, Johannes
Bambach, Markus
Hirt, Gerhard
[Journal Article]
Materials modelling in industrial bulk metal forming processes and process chains
In: Computer Methods in Materials Science, 15 (1), 5-12, 2015
Hirt, Gerhard (Corresponding author)
Bambach, Markus
Lohmar, Johannes
Güvenc, Onur
Henke, Thomas
et al.
[Contribution to a conference proceedings]
Fast and Accurate Force Prediction for High Quality Heavy Plates by A State Of The Art Rolling Model Calibrated From Mill Data via Inverse Techniques
In: 1st European Steel Technology & Application Days and 31st Journ'ees Sid'erurgiques Internationales, 2014
Lohmar, Johannes
Bambach, Markus
Hirt, Gerhard
Kiefer, Thomas
Kotliba, Daniel
et al.
[Journal Article]
The Precise Prediction of Rolling Forces in Heavy Plate Rolling Based on Inverse Modeling Techniques
In: Steel research international, 85 (11), 1525-1532, 2014
[DOI: 10.1002/srin.201300431]
Lohmar, Johannes (Corresponding author)
Bambach, Markus
Hirt, Gerhard
Kiefer, Thomas
Kotliba, Daniel
[Contribution to a conference proceedings, Journal Article]
Comparison of Semi-empirical and Dislocation Density based Material Equations for Fast Modeling of Multistage Hot Working of Steel
In: Procedia engineering, 81, 268-273, 2014
[DOI: 10.1016/j.proeng.2014.09.162]
Lohmar, Johannes
Bambach, Markus
Hirt, Gerhard
[Contribution to a book, Contribution to a conference proceedings]
Process and materials modelling in incremental bulk metal forming
In: 7th Forming Technology Forum 'Warm and Hot Forming' 15.-16.09.2014, Enschede, Niederlande / Herausgeber: Faculty of Engineering Technology, University of Twente, Enschede, the Netherlands. Ton van den Boogaard, 13-20, 2014
Hirt, Gerhard
Lohmar, Johannes
Rosenstock, Dirk
Seitz, Joachim Friedhelm
[Contribution to a book, Contribution to a conference proceedings]
Design and application of an advanced fast rolling model with through thickness resolution for heavy plate rolling
In: Ingot casting, rolling & forging : ICRF, ingot casting, rolling and forging 2014 ; 2nd International Conference ; Milan, Italy, 7 - 9 May 2014 / organised by AIM, Associazione Italiana di Metallurgia, 2014
Lohmar, Johannes
Seuren, Simon
Bambach, Markus
Hirt, Gerhard
[Contribution to a book, Contribution to a conference proceedings]
Inverse Modeling Techniques for the Precise Prediction of Rolling Forces and Torques in Heavy Plate Rolling
In: Rolling 2013 : 9th International Rolling Conference & 6th European Rolling Conference ; Venice (Italy), June 10 - 12, 2013 ; proceedings / organized by AIM, Associazione Italiana di Metallurgia, 1-8, 2013
Lohmar, Johannes
Bambach, Markus
Hirt, Gerhard
Kiefer, Thomas
Kotliba, Daniel
[Contribution to a book, Journal Article]
Influence of Different Interpolation Techniques on the Determination of the Critical Conditions for the Onset of Dynamic Recrystallisation
In: Materials science forum, 762, 331-336, 2013
[DOI: 10.4028/www.scientific.net/MSF.762.331]
Lohmar, Johannes
Bambach, Markus
[Contribution to a book, Contribution to a conference proceedings]
Recent developments in modeling of hot rolling processes: Part I - Fundamentals
In: The 11th International Conference on Numerical Methods in Industrial Forming Processes : NUMIFORM 2013 : Shenyang, China, 6-10 July 2013 / [Herausgeber: Shi-Hong Zhang, Xiang-Hua Liu, Ming Cheng, Juan Li, 06.-10.07.2013, Shenyang, China], 222-230, 2013
[DOI: 10.1063/1.4806828]
Hirt, Gerhard
Bambach, Markus
Seuren, Simon
Henke, Thomas
Lohmar, Johannes
[Contribution to a book, Contribution to a conference proceedings]
Recent developments in modeling of hot rolling processes: Part II - Applications
In: The 11th International Conference on Numerical Methods in Industrial Forming Processes : NUMIFORM 2013 : Shenyang, China, 6-10 July 2013 / [Herausgeber: Shi-Hong Zhang, Xiang-Hua Liu, Ming Cheng, Juan Li, 06.-10.07.2013, Shenyang, China], 231-238, 2013
[DOI: 10.1063/1.4806829]
Hirt, Gerhard
Bambach, Markus
Seuren, Simon
Henke, Thomas
Lohmar, Johannes
[Journal Article]
Influence of Microstructure Representation on Flow Stress and Grain Size Prediction in Through-Process Modeling of AA5182 Sheet Production
In: JOM, 65 (1), 93-98, 2013
[DOI: 10.1007/s11837-012-0485-z]
Lohmar, Johannes
Bambach, Markus
Karhausen, Kai Friedrich