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Joachim Danckert

Bio: Joachim Danckert is an academic researcher from Aalborg University. The author has contributed to research in topics: Deep drawing & Hydroforming. The author has an hindex of 21, co-authored 93 publications receiving 1455 citations.


Papers
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Journal Article•DOI•
TL;DR: In this article, the state of the art and key technologies concerned with equipment, process control, simulation, etc. are explored in detail, and conclusions are drawn concerning possible future developments in hydroforming technology.

228 citations

Journal Article•DOI•
TL;DR: In this article, the authors reviewed the development of the hydro-mechanical deep-drawing process in process performances, in theory and in numerical simulation, and summarized the applications.

127 citations

Journal Article•DOI•
TL;DR: In this article, a special process of hydrodynamic deep drawing assisted by radial pressure was investigated experimentally and the failure modes including fracture and heavy wrinkling were studied and predicted in experiment.

72 citations

Journal Article•DOI•
TL;DR: In this article, the effect of pre-bulging on sheet hydroforming is investigated experimentally and the needed process windows for the prebulging pressure and the pre-Bulging height are built by using pure aluminum and aluminum alloy.
Abstract: Many parameters influence the process of sheet hydroforming, but the key one is the pre-bulging. Pre-bulging includes two parameters: pre-bulging height and pre-bulging pressure, which influence the forming process significantly. In this paper, based on the proposed hydromechanical deep drawing with uniform pressure onto the blank, the effect of pre-bulging on the forming is investigated experimentally and the needed process windows for the pre-bulging pressure and the pre-bulging height are built by using pure aluminum and aluminum alloy. Finally, FEM is used to analyze the forming process to explain some results which were found in the experiment.

64 citations

Journal Article•DOI•
TL;DR: In this article, a hydrodynamic deep drawing assisted by radial pressure is proposed to explore the internal deformation mechanism of an Al-Mg-Si aluminum alloy by using explicit dynamic finite element calculations utilizing non-quadratic yield criteria.

57 citations


Cited by
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01 Jun 1985
TL;DR: In this paper, a technique for the measurement of the residual stress tensor averaged over a specified volume within a component is described, which involves measurement of small changes in lattice spacing using high resolution neutron diffraction.
Abstract: A technique is described for the measurement of the residual stress tensor averaged over a specified volume within a component. The method involves measurement of small changes in lattice spacing using high resolution neutron diffraction. The stress is inferred from these measurements of the strain, and the theory of the relationship between the two quantities is described, including the effects of crystalline anisotropy. The various types of high resolution neutron diffractometer suitable for the work are described. Experimental results validating the method are given for a simple bent bar of mild steel of known strain, a plastically strained mild steel bar, and a mild steel tube of known torsional strain. Examples of the method in practical use are given by a cracked fatigue test specimen, a double-V test weld and a weld joining a tube to a plate. A more detailed example is the anisotropic response of a polycrystalline sample under elastic and plastic strain; this is illustrated by measurements...

360 citations

Journal Article•DOI•
TL;DR: In this article, the authors define a new class of sheet-bulk metal forming processes, give an overview of the existing processes belonging to this class, highlight the tooling aspects as well as the resulting product properties and present a short summary of the relevant work that has been done towards modeling and simulation.

314 citations

Journal Article•DOI•
TL;DR: In this paper, the authors present the current state of the art regarding the assumed working mechanisms of MWFs including the effects of desired and undesired changes of the MWF properties.

292 citations

Journal Article•DOI•
TL;DR: In this article, the state of the art and key technologies concerned with equipment, process control, simulation, etc. are explored in detail, and conclusions are drawn concerning possible future developments in hydroforming technology.

228 citations

Journal Article•DOI•
TL;DR: In this article, a wide recognition of the research efforts in this field is presented, taking into account some general considerations on the difference sources of shape and dimensional errors, as well as the influence of the most relevant parameters.

228 citations