New methodology for the characterization of failure by fracture in bulk forming-Reference-Cited by-同舟云学术

New methodology for the characterization of failure by fracture in bulk forming

Published:2018-03-09 Issue:4 Volume:53 Page:242-247
ISSN:0309-3247
Container-title:The Journal of Strain Analysis for Engineering Design
language:en
Short-container-title:The Journal of Strain Analysis for Engineering Design

Author:

Magrinho Joao P¹,Silva Maria Beatriz¹,Alves Luis M¹,Atkins AG²,Martins Paulo AF¹

Affiliation:

1. IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal

2. Department of Engineering, University of Reading, Reading, UK

Abstract

This article is focused on the formability limits by fracture obtained from standard bulk metal forming tests performed with cylindrical, tapered and flanged specimens. A total of two novel features are presented: the use of digital image correlation to determine strain paths and immersion of steel specimens in liquid nitrogen after the onset of crack formation to reveal the mode of fracture. A new methodology to determine the fracture loci in principal strain space is proposed based on the combination of experimental force–displacement evolutions with in-plane strain measurements. The experimental work is performed in cold-drawn steel AISI 1045 and two new formability tests with different values of stress triaxiality are proposed for obtaining strains at fracture in regions of principal strain space that are not sufficiently well covered by standard bulk metal forming tests.

Publisher

SAGE Publications

Subject

Applied Mathematics,Mechanical Engineering,Mechanics of Materials,Modeling and Simulation

Link

http://journals.sagepub.com/doi/pdf/10.1177/0309324718758842

Reference14 articles.

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2. Time dependent determination of forming limit diagrams

3. Recent Approaches for the Determination of Forming Limits by Necking and Fracture in Sheet Metal Forming

4. Evaluation of the VDA 238-100 Tight Radius Bending Test using Digital Image Correlation Strain Measurement

5. Localization in NiTi tubes under bending

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