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Strain and stress conditions at crack initiation during shearing of medium- and high-strength steel sheet

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Abstract
Background: Strain and stress conditions in sheet metal shearing are of interest for calibration of various fracture
criteria. Most fracture criteria are governed by effective strain and stress triaxiality.
Methods: This work is an attempt to extend previous measurements of strain fields in shearing of steel sheets with
the stress state calculated from the measured displacement fields. Results are presented in terms of von Mises stress
and stress triaxiality fields, and a comparison was made with finite element simulations. Also, an evaluation of the
similarities of the stress conditions on the sheet surface and inside the bulk material was presented.
Results: Strains and von Mises stresses were similar to the surface and the bulk material, but the stress triaxiality was
not comparable. There were large gradients in strain and stress around the curved tool profiles that made the result
resolution dependent and comparisons of maximum strain and stress values difficult.
Conclusions: The stress state on the sheet surface calculated from displacement field measurements is useful for
validation of a three-dimensional finite element model.
Keywords: Sheet metal, Experiment, Shearing, Strain, Stress, Crack initiation

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Informasi Detail

Judul Seri

International Journal of Mechanical and Materials Engineering , Volume 12, Issue 1, December 2017

No. Panggil

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Penerbit

: Springer Singapore., 2017

Deskripsi Fisik

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Bahasa

English

ISBN/ISSN

2198-2791

Klasifikasi

NONE

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

International Journal of Mechanical and Materials

Subjek

MEKANIKA
TEKNIK MESIN

Info Detail Spesifik

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Pernyataan Tanggungjawab

ety

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