Experimental and numerical investigation on cold flat rolling processes of DC04 sheets with special focus on residual stressesShow others and affiliations
2016 (English)In: IOP Conference Series: Materials Science and Engineering, Institute of Physics Publishing (IOPP), 2016, Vol. 118, no 1, article id 012019Conference paper, Published paper (Refereed)
Abstract [en]
The process of cold flat rolling is a widespread industrial technique to manufacture semi-finished products, e.g., for the automotive or homewares industry. Basic knowledge of the process regarding dimensioning and adjustment of defined characteristics is already state of the art. However, a detailed consideration and analysis with respect to local inhomogeneous residual stresses in several process steps mostly remains disregarded. A broad understanding of the process due to the distribution of residual stresses in the workpiece and the direction of the stress tensors allows for a definition of the characteristics of the workpiece even before the actual manufacturing process. For that purpose, it is necessary to perform numerical investigations by means of the finite element analysis (FEA) of cold flat rolling processes. Within this contribution, several approaches for the calibration of the FEA with the real flat rolling process will be addressed and discussed. To ensure that the numerical consideration provides realistic results, this calibration is indispensable. General parameters such as geometry, height reduction, rolling temperature, process time, and the rolling speed are considered as well as a photogrammetric survey, and calculated residual stresses with results of X-ray diffraction (XRD) will be compared. In the course of the experiments, a good agreement between the stress results of the FEA and the XRD was found in the center of the specimen. In combination with the allocation of the stress orientations, the agreement close to the edges is also fine. Some issues that cause differences between the FEA and the experiment are dis-cussed.
Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2016. Vol. 118, no 1, article id 012019
Series
IOP Conference Series: Materials Science and Engineering, ISSN 1757-8981 ; Volume 118, Issue 1
Keywords [en]
Calibration, Finite element method, Manufacture, Residual stresses, Superconducting tapes, X ray diffraction, Cold flat rolling, Distribution of residual stress, Height reduction, Manufacturing process, Numerical investigations, Rolling temperature, Semi-finished products, Stress orientations, Cold rolling
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:hj:diva-51171DOI: 10.1088/1757-899X/118/1/012019ISI: 000376260700059Scopus ID: 2-s2.0-84971602137OAI: oai:DiVA.org:hj-51171DiVA, id: diva2:1507528
Conference
18th Chemnitz Seminar on Materials Engineering, 10 March 2016 through 11 March 2016
2020-12-082020-12-082020-12-08Bibliographically approved