Title:
CREEP FATIGUE TEST METHOD AND CONTROL DEVICE FOR CREEP TEST DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/142520
Kind Code:
A1
Abstract:
The purpose of the invention is to accurately simulate a state of a member of an actual machine by a creep fatigue test. In order to simulate a state of a member subjected to a stress causing creep fatigue during operation of an actual machine, this control device for a creep test device: acquires strain-time characteristics of a test piece by subjecting the test piece to a stress control which is a control for applying a stress so as to follow the stress-time characteristics during an operation cycle of the actual machine; and repeatedly performs, for said operation cycle, a strain control which is a control for applying a stress to the test piece so as to follow a change in strain in the strain-time characteristics. For example, characteristics obtained by subjecting the member to a thermal stress analysis are used for the stress-time characteristics. The strain control is performed at least in a period in which the stress in the stress-time characteristics is constant. The actual machine is, for example, a steam turbine, and the member is, for example, at least a portion of a casing or a valve of the steam turbine.
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Inventors:
MORISHITA KEIJI (JP)
NISHIDA HIDETAKA (JP)
MATSUMURA HIDEO (JP)
KATAOKA TOSHIAKI (JP)
NISHIDA HIDETAKA (JP)
MATSUMURA HIDEO (JP)
KATAOKA TOSHIAKI (JP)
Application Number:
PCT/JP2017/003656
Publication Date:
August 09, 2018
Filing Date:
February 01, 2017
Export Citation:
Assignee:
CHUGOKU ELECTRIC POWER (JP)
International Classes:
G01N3/32
Foreign References:
| JP2007225333A | 2007-09-06 | |||
| JP2009198296A | 2009-09-03 | |||
| JP2014202652A | 2014-10-27 | |||
| JP2003114177A | 2003-04-18 | |||
| JP2005227065A | 2005-08-25 |
Attorney, Agent or Firm:
ISSHIKI & CO. (JP)
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