Difference between 2D and 3D capturing and influence of strain rate on FLC diagram of DC.01 steel

• Autorzy: Potužník L. , Konopík P. , Rund M.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of this work is to develop a method for evaluating forming limit curves measured at high strain rates using drop tower while specimens are being captured by high-speed camera (2D). Design/methodology/approach: This article describes the first step to establishing such method – verification of compatibility between 3D and 2D capturing by ARAMIS system. Findings: Within this work, FLD recorded in 3D and 2D mode were determined. After correction of the angle α between projection onto the normal plane to direction of loading and tangent in the point where crack occurred, the obtained FLD diagram were almost identical. Research limitations/implications: Optical methods, such as digital image correlation used by ARAMIS measuring system, offer very detailed information of material’s surface at high resolution while significantly reducing the preparation and evaluation time for specimens testing. Originality/value: The analysis of true plane major strains in the forming limit diagram (FLD) is still the most established method for failure detection of sheet metal forming processes in industrial praxis. With the prerequisite of linear strain paths it is very simple to predict the start of necking by using the FLD.

Słowa kluczowe

EN

forming limit diagram; optical measuring; ARAMIS; 2D vs. 3D

PL

wykres odkształceń granicznych; pomiary optyczne; Aramis

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2014
• Tom: Vol. 65, nr 1
• Strony: 32--37
• Opis fizyczny: Bibliogr. 4 poz., rys.

Twórcy

autor

Potužník L.

• COMTES FHT a.s., Průmyslová 995, Dobřany, 334 41, Czech Republic

autor

Konopík P.

• COMTES FHT a.s., Průmyslová 995, Dobřany, 334 41, Czech Republic

autor

Rund M.

• COMTES FHT a.s., Průmyslová 995, Dobřany, 334 41, Czech Republic

Bibliografia

• [1] ASTM E2218, Standard Test Method for Determining Forming Limit Curves, ASTM International, West Conshohocken, PA, 2008.
• [2] W. Volk, R. Illig, H. Kupfer, Benchmark 1 – Virtual Forming Limit Curves, Proceedings of the Numisheet 2008 Conference, Interlaken, Switzerland, 2008, 3-9.
• [3] GOM: ARAMIS System, http://www.gom.com/3d-software/aramis-software.html
• [4] ISO 12004-2:2008, Metallic materials – Sheet and strip – Determination of forming-limit curves. Part 2: Determination of forming-limit curves in the laboratory.