J-R Curve Prediction of Pre-Strained Stainless Steel 316 Material Using FE Damage Analysis Method

Volume 6A: Materials and Fabrication ◽

10.1115/pvp2018-84627 ◽

2018 ◽

Author(s):

Jun-Min Seo ◽

Ji-Soo Kim ◽

Yun-Jae Kim

Keyword(s):

Experimental Data ◽

Fracture Toughness ◽

Damage Model ◽

Damage Analysis ◽

Fracture Toughness Test ◽

Toughness Test ◽

Cold Worked ◽

Axial Fracture ◽

Stainless Steel 316 ◽

Strain Model

In this study, a method to predict J-R curve of SUS316 material using FE damage analysis is proposed. As experimental data, tensile and fracture toughness test results of cold worked SUS316 are used. The damage model used in this study is multi-axial fracture strain model and the model is determined by simulating the tensile and fracture toughness test according to the procedure in R6 code [1]. A pre-strain constant is newly introduced to consider pre-strain damage caused by the pre-strain, and the damage for various degrees of pre-strain are calculated. As a result, the predicted J-R curves using FE damage model show good agreement with the experimental data.

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Quantification of the Material Ductility Effect on Notch Fracture Toughness Using Numerical Damage Analysis Method

Volume 6: Materials and Fabrication ◽

10.1115/pvp2020-21687 ◽

2020 ◽

Author(s):

Eui-kyun Park ◽

Gyo-Geun Youn ◽

Yun-Jae Kim ◽

Masayuki Kamaya

Keyword(s):

Fracture Toughness ◽

Fracture Resistance ◽

Damage Model ◽

Fe Analysis ◽

Damage Analysis ◽

Notch Radius ◽

Cold Worked ◽

Axial Fracture ◽

Material Ductility ◽

The Relationship

Abstract In this study, the finite element (FE) damage analysis based on the multi-axial fracture strain model was applied to investigate the effect of the material ductility on fracture resistance of notched defect. (The fracture toughness is used only for a cracked specimen and the fracture resistance is used for notched specimens throughout the paper.) To obtain the material property with different ductility, the tensile and fracture toughness tests of the cold-worked SUS316 were used. The damage model was determined from comparing the experimental data with simulated FE analysis results. Then the FE analysis was applied to calculate the fracture resistance according to the notch radius in each material. It shows that the slope of initiation resistance according to the notch radius was related to the material ductility. To quantify this effect of ductility, the relationship between notch fracture resistance and material tensile properties was confirmed.

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A Method to Quantify Thermal Aging Effect on Fracture Toughness of Cast Stainless Steels Using Small Punch Test

Volume 1: Codes and Standards ◽

10.1115/pvp2014-28233 ◽

2014 ◽

Author(s):

Jun-Young Jeon ◽

Dong-Il Ryu ◽

Yun-Jae Kim ◽

Mi-Yeon Lee ◽

Jin-Weon Kim

Keyword(s):

Fracture Toughness ◽

Test Data ◽

Stainless Steels ◽

Fracture Strain ◽

Fracture Toughness Test ◽

Small Punch ◽

Fracture Simulation ◽

Toughness Test ◽

Axial Fracture ◽

Strain Model

In this study, a method to predict fracture toughness of aged cast austenitic stainless steels (CASSs) using small punch (SP) test and finite element (FE) analysis is proposed. Grade CF8M is considered and thermally aged up to 5,000 hours at 400°C. SP tests and fracture toughness test using compact tension (C(T)) specimen are conducted with virgin (unaged) and aged CF8M. FE analyses performed in this study use ductile fracture simulation technique with ‘the multi-axial fracture strain model’. The multi-axial fracture strain model for each aged CF8M are determined from SP test data and FE analyses. Fracture toughness of aged CF8M are predicted by conducting fracture toughness test simulations using FE damage analyses. Predicted fracture toughness results are compared with C(T) data to validate the method suggested in this study. The predicted initiation toughness values are predicted well and fracture toughness values are slightly conservative compared to test data.

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Energy-based numerical modeling of the strain rate effect on fracture toughness of SA508 Gr. 1a

The Journal of Strain Analysis for Engineering Design ◽

10.1177/0309324717696609 ◽

2017 ◽

Vol 52 (3) ◽

pp. 177-189 ◽

Cited By ~ 5

Author(s):

Hyun-Suk Nam ◽

Yun-Jae Kim ◽

Jin-Weon Kim ◽

Jong-Sung Kim

Keyword(s):

Fracture Toughness ◽

Strain Rate ◽

Damage Model ◽

Type Model ◽

Fracture Toughness Test ◽

Ductile Tearing ◽

Rate Dependent ◽

Energy Concept ◽

Axial Fracture ◽

Dynamic Loading Conditions

This article presents an energy-based method to simulate ductile tearing under dynamic loading conditions. The strain rate–dependent material properties are characterized by the Johnson–Cook-type model. The damage model is defined based on the multi-axial fracture strain energy concept. The proposed damage model is applied to simulate the fracture toughness test of SA508 Gr. 1a under four different test speeds. Simulated results show a good overall agreement with the experimental results.

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222 Fracture Toughness Test and Damage Analysis of GFRP Woven Laminates at Cryogenic Temperatures

The Proceedings of Conference of Tohoku Branch ◽

10.1299/jsmeth.2004.39.88 ◽

2004 ◽

Vol 2004.39 (0) ◽

pp. 88-89

Author(s):

Mayumi Sumikawa ◽

Yasuhide Shindo ◽

Susumu Kumagai ◽

Fumio Narita ◽

Katsumi Horiguchi

Keyword(s):

Fracture Toughness ◽

Damage Analysis ◽

Fracture Toughness Test ◽

Cryogenic Temperatures ◽

Toughness Test

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Precise Instrumentation and Stabilization of Interlaminar Fracture Toughness Test on CFRP by Long Gage Strain Measurement.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A ◽

10.1299/kikaia.65.1405 ◽

1999 ◽

Vol 65 (634) ◽

pp. 1405-1411

Author(s):

Kouichi KATSURA ◽

Kiyoshi TANAKA ◽

Kenji AONO

Keyword(s):

Fracture Toughness ◽

Strain Measurement ◽

Fracture Toughness Test ◽

Interlaminar Fracture Toughness ◽

Interlaminar Fracture ◽

Toughness Test

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Experimental Investigation on Relative Crack Length For Fracture Toughness of Concrete

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.146-147.1524 ◽

2010 ◽

Vol 146-147 ◽

pp. 1524-1528 ◽

Cited By ~ 3

Author(s):

Xue Zhi Wang ◽

Zong Chao Xu ◽

Zhong Bi ◽

Hao Wang

Keyword(s):

Fracture Toughness ◽

Experimental Investigation ◽

Crack Length ◽

Fracture Toughness Test ◽

Test Results ◽

Toughness Test ◽

Wedge Splitting Test ◽

Splitting Test ◽

Wedge Splitting

The wedge splitting test specimens with three series of different relative crack length were used to study the influences of relative crack length on the fracture toughness of common concrete. The suitable formulation for fracture toughness of concrete with different relative crack length was gotten on comparing between fracture toughness test results and computation results of the model developed from Hu formula.

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