Clinching of Aluminum Materials – Methods for the Continuous Characterization of Process, Microstructure and Properties

Kupfer, Robert

doi:10.1016/j.jajp.2022.100108

Cited by 23 publications

(9 citation statements)

References 47 publications

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“…Subsequent recrystallization annealing of the aluminum strip led to grain refinement when the degree of deformation was sufficiently high. [37] Similar changes in the grain structure around a joint as shown here can also be found in the study by Kupfer et al [38] . In the said study, similar analysis points were chosen, but in contrast to the EBSD images shown here, the authors presented LOM images for this application.…”

Section: Local Grain Structure Around the Spr Jointsupporting

confidence: 87%

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Mechanical Properties and Joinability of AlSi9 Alloy Manufactured by Twin‐Roll Casting

et al. 2022

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Section: Local Grain Structure Around the Spr Jointsupporting

confidence: 87%

“…In the said study, similar analysis points were chosen, but in contrast to the EBSD images shown here, the authors presented LOM images for this application. Moreover, Kupfer et al [ 38 ] used the material combination EN AW–6014/EN AW–6014 and a clinch joint to analyze the grain structure around a joint.…”

Section: Resultsmentioning

confidence: 99%

Mechanical Properties and Joinability of AlSi9 Alloy Manufactured by Twin‐Roll Casting

et al. 2022

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“…Therefore, data from a hydraulic bulge test was used as an additional interpolation point for the calibration. The bulge test is described in [19] and is characterized primarily by high plastic deformation with low frictional influence. The test generates an almost constant biaxial stress states with η = 2/3 and ξ = -1 in the material.…”

Section: Materials and Testing Methodsmentioning

confidence: 99%

A calibration method for failure modeling in clinching process simulations

Böhnke

2023

Materials Research Proceedings

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Abstract. In the numerical simulation of mechanical joining technologies such as clinching, the material modeling of the joining parts is of major importance. This includes modeling the damage and failure behavior of the materials in accordance with varying occurring stress states. This paper presents a calibration method of three different fracture models. The calibration of the models is done by use of experimental data from a modified punch test, tensile test and bulge test in order to map the occurring stress states from clinching processes and to precisely model the resulting failure behavior. Experimental investigations were carried out for an aluminum alloy EN AW-6014 in temper T4 and compared with the simulative results generated in LS-DYNA. The comparison of force-displacement curves and failure initiation shows that the Hosford–Coulomb model predicts the failure behavior for the material used and the tests applied with the best accuracy.

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“…It has proven particularly useful for the implementation of multi-material designs, which have become important in the context of lightweight construction in the automotive industry [1]. The material combination and clinching process parameters examined in this paper has been extensively investigated in [2]. In particular, the process chain of clinching aluminum EN AW-6014 T4 was described and experimental techniques were proposed to analyze the process-structure-property relationships from the sheet metals properties to the joined structure.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of failure modeling in clinching process chain simulation

Bielak

2023

Materials Research Proceedings

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Abstract. The application of the mechanical joining process clinching allows the assembly of different sheet metal materials with a wide range of material thickness configurations, which is of interest for lightweight multi-material structures. In order to be able to predict the clinched joint properties as a function of the individual manufacturing steps, current studies focus on numerical modeling of the entire clinching process chain. It is essential to be able to take into account the influence of the joining process-induced damage on the load-bearing capacity of the joint during the loading phase. This study presents a numerical damage accumulation in the clinching process based on an implemented Hosford-Coulomb failure model using a 3D clinching process model applied on the aluminum alloy EN AW-6014 in temper T4. A correspondence of the experimentally determined failure location with the element of the highest numerically determined damage accumulation is shown. Moreover, the experimentally determined failure behavior is predicted to be in agreement in the numerical loading simulation with transferred pre-damage from the process simulation.

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Clinching of Aluminum Materials – Methods for the Continuous Characterization of Process, Microstructure and Properties

Cited by 23 publications

References 47 publications

Mechanical Properties and Joinability of AlSi9 Alloy Manufactured by Twin‐Roll Casting

Mechanical Properties and Joinability of AlSi9 Alloy Manufactured by Twin‐Roll Casting

A calibration method for failure modeling in clinching process simulations

Numerical analysis of failure modeling in clinching process chain simulation

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