Search Results 1-20 of 1126

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3D J-integral evaluation for solids undergoing large elastic–plastic deformations with residual stresses and spatially varying mechanical properties of a material

Hiroshi Okada , Tatsuro Ishizaka , Akira Takahashi , Koichiro Arai , Yasunori Yusa

… In this paper, a 3D J-integral based on the domain integral approach is presented for large deformation elastic–plastic fracture mechanics problems associated with residual stresses and spatially varying mechanical properties of a material. … The proposed 3D J-integral has physical significance as the energy dissipation into the process zone. …

Engineering Fracture Mechanics (236), 107212, 2020-09

IR
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Analysis of J-Integral for Adhesive Joints by Finite Element Method [in Japanese]

大宮正毅 , 今中誠

日本接着学会誌 = Journal of the Adhesion Society of Japan : adhesion 56(11), 456-462, 2020
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FATIGUE CRACK PROPAGATION LIFE ASSESSMENT OF STEELS PREDICTED BY LOCAL ELASTOPLASTICITY RESPONSE - SURFACE CRACK PROPAGATION PROPERTY IN STRESS CONCENTRATION FIELD - [in Japanese]

TSUTSUMI Seiichiro , NAGAHAMA Hirokazu , KIYOKAWA Yuki , FINCATO Riccardo

… <tt>疲労損傷過程は一般に，亀裂発生とその後の伝播段階に分けて議論され，疲労亀裂進展の駆動力としては応力拡大係数や </tt>J <tt>積分が採用される．著者らは近年，材料の局所的な弾塑性応答に基づいた疲労亀裂伝播寿命評価手法を提案している．本手法では，まず繰返し弾塑性 </tt>FE <tt>解析と </tt>Δε-Nc <tt>基準を用いて疲労亀裂発生寿命を評価し …

Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 76(2), I_399-I_410, 2020

J-STAGE
4

Brittle failure criteria of CNRB specimen for fracture toughness test

KANESAKI Manato , OBUNAI Kiyotaka , FUKUTA Tadao , KUROSHIMA Yoshihito , OZAKI Koichi

This paper proposes a technique to determine the dimensions of a CNRB specimen to be used for plane fracture toughness tests. First, the brittle fracture behavior satisfying the small-scale y …

Mechanical Engineering Journal 7(4), 19-00621-19-00621, 2020

J-STAGE
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Effect of local plastic component on crack opening displacement and on J-integral of a circumferential penetrated crack

MACHIDA Hideo , ARAKAWA Manabu , WAKAI Takashi

… This paper describes the effect of local plastic component on J-integral and crack opening displacement (COD) evaluation of a circumferential penetrated crack, applicable to the leak before break (LBB) assessment for sodium cooled fast reactor (SFR) components. … J-integral and COD evaluation methods are generally formulated as a summation of elastic and plastic components, and so far many evaluation formulae based on these two components have been proposed. …

Mechanical Engineering Journal 7(3), 19-00525-19-00525, 2020

J-STAGE
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Investigation of calculation procedure of stress intensity factor for fully circumferential flaw beneath reactor pressure vessel cladding [in Japanese]

HIROTA Takatoshi , OGAWA Naoki , SAKAMOTO Hiroyuki

… However, since this method is a rather conservative in comparison with that obtained by elastic-plastic finite element analysis, JEAC 4206-2016 also allows to calculate the stress intensity factor by converting the J-integral obtained from elastic-plastic finite element analysis. …

Transactions of the JSME (in Japanese) 86(882), 19-00308-19-00308, 2020

J-STAGE
7

Application of ΔJ based on the domain integral method to finite strain elastic-plastic crack propagation problem under cyclic loads [in Japanese]

荒井皓一郎 , 岡田裕 , 佐々木由実 , 坂部猛志朗 , 遊佐泰紀

計算工学講演会論文集 Proceedings of the Conference on Computational Engineering and Science 24, 6p, 2019-05
8

Estimating J-integral from Displacement Fields Measured by Digital Image Correlation [in Japanese]

米山聡

非破壊検査 : 検査と材料評価 : journal of the Japanese Society for Non-destructive Inspection 68(4), 155-161, 2019-04
9

Considerations for R-curve and critical J-integral obtained from a round bar with circumferential crack [in Japanese]

MORISHITA Shinichiro , KASABA Koichi , SUGITANI Tatsuya

… The corresponding J integral are 17 kJ/m2 … Although J-R curves of a CT and a bar show not big difference each other, the corresponding J of a bar as mentioned above is much different scale from critical J of CT specimen. …

The Proceedings of the Materials and Mechanics Conference 2019(0), OS1713, 2019

J-STAGE
10

Proposal of guidelines for structural integrity assessment on thermal aging embrittlement of cast austenitic stainless steel in BWR environment [in Japanese]

MIURA Yasufumi , ARAI Taku

… This proposal contains the evaluation methods to estimate the amount of fatigue crack propagation, mechanical properties after aging, and the value of applied J integral using fracture mechanics evaluation. …

The Proceedings of the Materials and Mechanics Conference 2019(0), OS1316, 2019

J-STAGE
11

Effect of transient thermal stress around cooling hole on creep fatigue crack growth rate [in Japanese]

YONAKUNI Yuki , OKAZAKI Masakazu , YOSHIZAKI Shin

… The crack propagation behavior could be evaluated via the stress intensity factor range under the condition of fatigue-dominant and the creep J-integral range under the condition of creep-dominant, respectively. …

The Proceedings of the Materials and Mechanics Conference 2019(0), OS0309, 2019

J-STAGE
12

Three-dimensional moving finite element analysis of Charpy impact test [in Japanese]

HAYASHI Yuya , FUJIMOTO Takehiro

… In the 3D moving finite element analyses, fracture resistance is estimated based on dynamic J integral. …

The Proceedings of The Computational Mechanics Conference 2019.32(0), 155, 2019

J-STAGE
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Three-dimensional stationary crack analyses considering contact by XFEM [in Japanese]

SHINDO Sana , NAGASHIMA Toshio

… In this paper, crack opening displacement, J-integral, and SIFs were evaluated by the developed in-house XFEM code. …

The Proceedings of The Computational Mechanics Conference 2019.32(0), 170, 2019

J-STAGE
14

Development of Three-dimensional Thermal Stress Analyses Software using XFEM [in Japanese]

NAGASHIMA Toshio

… Two kind of XFEM analysis sofwares, which perform steady state or transient heat transfer analysis and subsequent stress analysis to evaluate J-integral and Stress Intensity Fators, were developed. …

The Proceedings of The Computational Mechanics Conference 2019.32(0), 083, 2019

J-STAGE
15

Study of parameters to develop fracture criterion under low cycle fatigue [in Japanese]

WADA Yoshitaka , OHBAYASHI Yuto

… is necessary to consider dynamic loading．Objective of research is to study of fracture criterion using stress triaxiality and equivalent plastic strain for cracked pipes under cyclic loading stress compared with J integral which is an existing fracture parameter．For development of fracture criterion，to do FE analysis using fracture test of cracked pipes by CRIEPI．The conditions of an analysis is almost the same as T47 report by CRIEPI．Due to increase the amplitude load，ΔJ …

The Proceedings of The Computational Mechanics Conference 2019.32(0), 077, 2019

J-STAGE
16

Fracture Toughness Experiment for Numerical Analysis Ductile Fracture [in Japanese]

OZAWA Rekisei , WADA Yoshitaka

… J-integral has application limit. … J-integral cannot evaluate a fracture behavior with a large plastic area. …

The Proceedings of The Computational Mechanics Conference 2019.32(0), 035, 2019

J-STAGE
17

Fracture Mechanical Strength Evaluation of Adhesive Joints between CFRP and Aluminum Alloy by Digital Image Correlation under Mixed-mode Loadings [in Japanese]

SHIMAMOTO Shota , OMIYA Masaki

… In this study, we made adhesive joints between CFRP and aluminum alloy to obtain J-integral values from strain field near the crack tip measured by Digital Image Correlation (DIC). … Then we will compare between that J-integral values from DIC and that of FEM analyses in mixed mode tensile tests. …

The Proceedings of Mechanical Engineering Congress, Japan 2019(0), J04116P, 2019

J-STAGE
18

Thermal fatigue crack growth analysis using open source CAE [in Japanese]

KANEKO Yusuke , FUJIOKA Terutaka , ENDO Toshihiro , OSAKABE Kazuya

… Fatigue crack propagation can be evaluated using the fatigue J integral range and the associated crack propagation law. …

The Proceedings of Mechanical Engineering Congress, Japan 2019(0), J04208P, 2019

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19

FATIGUE CRACK INITIAITON AND PROPAGATION LIFE OF STEELS PREDICTED BY LOCAL ELASTOPLASTICITY RESPONCE [in Japanese]

TSUTSUMI Seiichiro , NAGAHAMA Hirokazu , FINCATO Riccardo

… 疲労損傷過程は一般に，き裂発生とその後の伝播段階に分けて議論され，疲労き裂進展の駆動力としては応力拡大係数やJ 積分を採用することが多い．疲労き裂発生寿命の評価手法は様々提案されているが，著者らは近年，繰返し硬軟化挙動を再現可能な材料モデルを採用した弾塑性 FEM 解析を活用する疲労き裂発生寿命評価手法を提案している．材料の弾塑性応答に強く依存する疲労き裂の発生とその後の進展 …

Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 75(2), I_445-I_453, 2019

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20

Effects of Ni and Co Contents on Characteristics of Tensile, Impact, and Fracture Toughness of Low Thermal Expansive Spheroidal Graphite Cast Iron [in Japanese]

Hatate Minoru , Kawahara Kiyohiro , Shiota Toshio , Komatsu Shinichiro

… Several characteristics such as thermal expansion, strength, ductility, and toughness were examined in thermal expansion, static tensile, dynamic Charpy impact, and fracture toughness (J-integral) tests for two series of 1.8%C-1%Si low thermal expansive spheroidal graphite cast iron (LE-FCD) samples. … The fracture toughness JIC …

Journal of Japan Foundry Engineering Society 91(12), 856-862, 2019

J-STAGE

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