Computational prediction of chevron cracking during multi-pass cold forward extrusion

Kubík, Petr; Petruška, Jindřich; Judas, Jakub; Šebek, František

doi:10.1016/j.jmapro.2023.07.025

Cited by 1 publication

(1 citation statement)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The critical value of the criterion is determined using an appropriate calibration test. Kubik et al [ 25 ] used the uncoupled ductile fracture criteria to investigate cracking in the six-pass cold forward extrusion process. Experiments, including the new small punch test, were conducted to calibrate the criteria.…”

Section: Introductionmentioning

confidence: 99%

New Method for Detecting Flange Fracture Initiation in Incremental Radial Extrusion

Winiarski

2024

Materials

View full text Add to dashboard Cite

This study investigates flange fracture formation in unconventional incremental radial extrusion. This manufacturing technique involves using rings with a gradually increasing inside diameter for constraining the free flow of material in the radial direction. As a result, the shaped flange has a constant thickness and a significantly larger diameter than that formed using the standard extrusion process conducted without the use of rings. EN AW 6060 aluminum alloy tube sections were used as the billet material, and the extrusion process was conducted under cold forming conditions at ambient temperature. For the determination of material fracture initiation, a new method was proposed involving the analysis of strain, strain rate and values of the normalized Cockcroft–Latham fracture criterion integral. The main advantage of the new method is that it allows for the prediction of fracture initiation via only FEM results analysis, i.e., it is not necessary to carry out additional experiments aimed at calibrating or determining limit parameters of a given material. It was shown that the occurrence of differences in the distribution of the above-mentioned parameters coincided with flange fracture initiation.

show abstract

Section: Introductionmentioning

confidence: 99%

New Method for Detecting Flange Fracture Initiation in Incremental Radial Extrusion

Winiarski

2024

Materials

View full text Add to dashboard Cite

show abstract

Computational prediction of chevron cracking during multi-pass cold forward extrusion

Cited by 1 publication

References 40 publications

New Method for Detecting Flange Fracture Initiation in Incremental Radial Extrusion

New Method for Detecting Flange Fracture Initiation in Incremental Radial Extrusion

Contact Info

Product

Resources

About