Determination of Strain Gradient Change Influence at the Bore Expansion Test

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24210%2F15%3A00002499" target="_blank" >RIV/46747885:24210/15:00002499 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Determination of Strain Gradient Change Influence at the Bore Expansion Test

Original language description

The bore expansion test represents one of basic technological tests for determination preparation technologies influence on the maximal strain value. The most frequently it is used to determine material limit stage at comparison blanking and e.g. nonconventional cutting methods (abrasive water jet, laser and so on). Regarding the great development of contact-less optical methods for measuring deformation it is subsequently very suitable to use photogrammetry also at measurement and evaluation the bore expansion test. As an advantage there is e.g. very transparent graphical display of strain distribution around the bore without necessity to manually measure final bore diameter, information about strain change course during the whole test or also possibility to display strain gradient in any direction. On the other hand among disadvantages of contact-less optical deformation measurement is mainly purchase price, necessity of their precious adjustment before measurement (calibration of cameras, setting of shutters and so on) and also requirement for special surface treatment of sample (stochastic pattern). Within the experimental part of this paper there was measured the bore expansion test by contact-less optical system ARAMIS. As a tested material was chosen the phosphated deep-drawing material DC06. The purpose was to find out for six different initial diameters (from 5 mm up to 30 mm á 5 mm) strain distribution around bore for the last stage before the crack and subsequently to evaluate strain gradient change in radial direction. After that final data were processed statistically and graphically, mutually compared to determine strain gradient change influence.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20301 - Mechanical engineering

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

METAL 2015 Conference Proceedings

ISBN

978-80-87294-62-8

ISSN

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e-ISSN

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Number of pages

6

Pages from-to

415-420

Publisher name

TANGER Ltd.

Place of publication

Ostrava

Event location

Brno

Event date

Jan 1, 2015

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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