Time-dependent Crack Initiation Strength Property of Epoxy/SUS Adhesive Joints

2017 ◽  
Vol 2017 (0) ◽  
pp. J0460104
Author(s):  
Kosuke INOUE ◽  
Tsubasa TADA ◽  
Yoshimasa TAKAHASHI ◽  
Masanori TAKUMA ◽  
Ken-ichi SAITO ◽  
...  
Keyword(s):  
Crack Initiation ◽  
Strength Property ◽  
Adhesive Joints ◽  
Time Dependent

Time-dependent crack initiation strength from interface edge of adhesive joints

2020 ◽  
Vol 2020.95 (0) ◽  
pp. 03_309
Author(s):  
Kenta WADA ◽  
Yoshimasa TAKAHASHI ◽  
Masanori TAKUMA ◽  
Ken-ichi SAITOH ◽  
Tomohiro SATO
Keyword(s):  
Crack Initiation ◽  
Adhesive Joints ◽  
Time Dependent ◽  
Interface Edge

TDFAD Analysis of Creep Crack Initiation in 0.5CMV/2.25CrMoV Steel Weldments

2019 ◽  
Author(s):  
M. Ejaz ◽  
C. M. Davies
Keyword(s):  
Crack Initiation ◽  
Creep Crack Growth ◽  
Compact Tension ◽  
Parent Material ◽  
Time Dependent ◽  
Creep Crack ◽  
Material Condition ◽  
Weld Material ◽  
Failure Assessment ◽  
Dependent Failure

Abstract The time dependent failure assessment diagram (TDFAD) is a convenient methodology to simultaneously assess whether a component is likely to fail by brittle, ductile or creep fracture, plastic collapse or creep rupture. In this work, creep toughness data, Kmatc, have been derived from experimental creep crack growth (CCG) tests on compact tension fracture mechanics specimens made of a weldment consisting of 0.5CMV parent material, 2.25CrMo, where the starter crack was located in the heat affected zone (HAZ). Time dependent failure assessment diagrams (TDFADs) are then constructed for each material condition and creep crack initiation (CCI) time predictions were obtained for the CCG tests performed on the weldment samples using both a TDFAD based on either parent and weld material data. The TDFAD based on the weld data provided the most conservative prediction of CCI times thus is recommended for use for weldment samples.

Correlation Analysis Between Time-Dependent Creep Crack-Tip Stress and Constraint Effect on Creep Crack Initiation Time

2020 ◽  
Author(s):  
Seung-Ho Lee ◽  
Hyun-Woo Jung ◽  
Yun-Jae Kim ◽  
Kamran Nikbin ◽  
Robert A. Ainsworth
Keyword(s):  
Crack Initiation ◽  
Correlation Analysis ◽  
Creep Crack Growth ◽  
Crack Tip ◽  
Compact Tension ◽  
Time Dependent ◽  
Initiation Time ◽  
Constraint Effect ◽  
Creep Crack ◽  
Crack Tip Stress

Abstract In this study, to qualify the constraint effect on creep crack initiation, the correlation analysis between proposed constraint parameter Q’ using time-dependent creep crack-tip stress and creep crack initiation time variable Ai was performed. Ai implies the influence of constraint effect on creep crack initiation. The procedure to calculate the Ai and the Q’-parameter was presented. To evaluate various status of constraint effect, creep crack growth tests for twenty-one compact tension specimens of Type 316H stainless steel at 550°C were investigated. The results of correlation analysis explain the reason for the different initiation time at the same C* level in respect of constraint effect.

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