---
_id: '30683'
abstract:
- lang: eng
  text: 'When joining lightweight parts of various materials, clinching is a cost
    efficient solution. In a production line, the quality of a clinch point is primarily
    controlled by measurement of dimensions, which are accessible from outside. However,
    methods such as visual testing and measuring the bottom thickness as well as the
    outer diameter are not able to deliver any information about the most significant
    geometrical characteristic of the clinch point, neck thickness and undercut. Furthermore,
    ex-situ destructive methods such as microsectioning cannot detect elastic deformations
    and cracks that close after unloading. In order to exceed the current limits,
    a new non-destructive in-situ testing method for the clinching process is necessary.
    This work proposes a concept to characterize clinch points in-situ by combining
    two complementary non-destructive methods, namely, computed tomography (CT) and
    ultrasonic testing. Firstly, clinch points with different geometrical characteristics
    are analysed experimentally using ex-situ CT to get a highly spatially resolved
    3D-image of the object. In this context, highly X-ray attenuating materials enhancing
    the visibility of the sheet-sheet interface are investigated. Secondly, the test
    specimens are modelled using finite element method (FEM) and a transient dynamic
    analysis (TDA) is conducted to study the effect of the geometrical differences
    on the deformation energy and to qualify the TDA as a fast in-situ non-destructive
    method for characterizing clinch points at high temporal resolution. '
author:
- first_name: D.
  full_name: Köhler, D.
  last_name: Köhler
- first_name: B.
  full_name: Sadeghian, B.
  last_name: Sadeghian
- first_name: R.
  full_name: Kupfer, R.
  last_name: Kupfer
- first_name: J.
  full_name: Troschitz, J.
  last_name: Troschitz
- first_name: M.
  full_name: Gude, M.
  last_name: Gude
- first_name: A.
  full_name: Brosius, A.
  last_name: Brosius
citation:
  ama: Köhler D, Sadeghian B, Kupfer R, Troschitz J, Gude M, Brosius A. A Method for
    Characterization of Geometric Deviations in Clinch Points with Computed Tomography
    and Transient Dynamic Analysis. <i>Key Engineering Materials</i>. 2021;883:89-96.
    doi:<a href="https://doi.org/10.4028/www.scientific.net/kem.883.89">10.4028/www.scientific.net/kem.883.89</a>
  apa: Köhler, D., Sadeghian, B., Kupfer, R., Troschitz, J., Gude, M., &#38; Brosius,
    A. (2021). A Method for Characterization of Geometric Deviations in Clinch Points
    with Computed Tomography and Transient Dynamic Analysis. <i>Key Engineering Materials</i>,
    <i>883</i>, 89–96. <a href="https://doi.org/10.4028/www.scientific.net/kem.883.89">https://doi.org/10.4028/www.scientific.net/kem.883.89</a>
  bibtex: '@article{Köhler_Sadeghian_Kupfer_Troschitz_Gude_Brosius_2021, title={A
    Method for Characterization of Geometric Deviations in Clinch Points with Computed
    Tomography and Transient Dynamic Analysis}, volume={883}, DOI={<a href="https://doi.org/10.4028/www.scientific.net/kem.883.89">10.4028/www.scientific.net/kem.883.89</a>},
    journal={Key Engineering Materials}, author={Köhler, D. and Sadeghian, B. and
    Kupfer, R. and Troschitz, J. and Gude, M. and Brosius, A.}, year={2021}, pages={89–96}
    }'
  chicago: 'Köhler, D., B. Sadeghian, R. Kupfer, J. Troschitz, M. Gude, and A. Brosius.
    “A Method for Characterization of Geometric Deviations in Clinch Points with Computed
    Tomography and Transient Dynamic Analysis.” <i>Key Engineering Materials</i> 883
    (2021): 89–96. <a href="https://doi.org/10.4028/www.scientific.net/kem.883.89">https://doi.org/10.4028/www.scientific.net/kem.883.89</a>.'
  ieee: 'D. Köhler, B. Sadeghian, R. Kupfer, J. Troschitz, M. Gude, and A. Brosius,
    “A Method for Characterization of Geometric Deviations in Clinch Points with Computed
    Tomography and Transient Dynamic Analysis,” <i>Key Engineering Materials</i>,
    vol. 883, pp. 89–96, 2021, doi: <a href="https://doi.org/10.4028/www.scientific.net/kem.883.89">10.4028/www.scientific.net/kem.883.89</a>.'
  mla: Köhler, D., et al. “A Method for Characterization of Geometric Deviations in
    Clinch Points with Computed Tomography and Transient Dynamic Analysis.” <i>Key
    Engineering Materials</i>, vol. 883, 2021, pp. 89–96, doi:<a href="https://doi.org/10.4028/www.scientific.net/kem.883.89">10.4028/www.scientific.net/kem.883.89</a>.
  short: D. Köhler, B. Sadeghian, R. Kupfer, J. Troschitz, M. Gude, A. Brosius, Key
    Engineering Materials 883 (2021) 89–96.
date_created: 2022-03-29T08:46:40Z
date_updated: 2023-01-02T11:48:16Z
department:
- _id: '630'
doi: 10.4028/www.scientific.net/kem.883.89
intvolume: '       883'
language:
- iso: eng
page: 89-96
project:
- _id: '130'
  grant_number: '418701707'
  name: 'TRR 285: TRR 285'
- _id: '133'
  name: 'TRR 285 - C: TRR 285 - Project Area C'
- _id: '148'
  name: 'TRR 285 – C04: TRR 285 - Subproject C04'
publication: Key Engineering Materials
status: public
title: A Method for Characterization of Geometric Deviations in Clinch Points with
  Computed Tomography and Transient Dynamic Analysis
type: journal_article
user_id: '14931'
volume: 883
year: '2021'
...