Search Results 1-20 of 7390

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EVALUATION ON PLASTIC DEFORMATION CAPACITY OF STEEL BEAM ENDS WITH LOCAL BUCKLING AND FRACTURE UNDER CYCLIC LOADING USING FE ANALYSIS [in Japanese]

SAWAMOTO Yoshikazu , KUBOTA Jun , OHSAKI Makoto

… To prevent damage under such ground motion, evaluation on deformation capacity of steel member (welded beam end, etc.) has been required under multi-cycle loading. In this paper, deformation capacity of the steel beam with local buckling and ductile fracture is assessed by the FE analysis based on the fracture rule (cyclic damage rule and monotonic damage rule) and recontact of removed element. …

Journal of Structural and Construction Engineering (Transactions of AIJ) (767), 105-115, 2020-01

J-STAGE AIJ
2

Damage-property analysis of carbon fiber-reinforced plastic based on homogenization theory

GOTO Keita , TOMIOKA Takuya , ARAI Masahiro

… In this study, the damage-development behavior of carbon fiber-reinforced plastic (CFRP) laminates considering the nonlinear mechanical properties of a matrix resin was investigated through a numerical simulation based on a homogenization theory and continuum damage mechanics. … The experimental fracture stresses were distributed between the maximum and minimum stresses at the failure starting points obtained from the numerical results. …

Mechanical Engineering Journal, 2020

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3

Influence evaluation of sampling methods of the nondestructive examination on failure probability of piping based on probabilistic fracture mechanics analysis

MANO Akihiro , KATSUYAMA Jinya , LI Yinsheng

… Probabilistic fracture mechanics (PFM) analysis, which is one of rational structural integrity assessment methods, can quantitatively calculate failure probability of welds in piping by considering aging degradation mechanisms, such as stress corrosion cracking and fatigue, as well as crack detections and repair of cracked welds through NDE. …

Mechanical Engineering Journal, 2020

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4

Damage model for simulating fracture behavior involving frictional contact on crack face and its performance verification [in Japanese]

KURUMATANI Mao , SOMA Yuto

本論文では，摩擦接触を伴う破壊挙動を再現するための損傷モデルを示し，3次元の有限要素解析において提案モデルの解析精度および妥当性を検証する．提案モデルの特徴は，準脆性材料の破壊力学に基づいて破壊挙動を精度よく再現可能な損傷モデルに，クーロンの摩擦モデルに基づいて破壊面での摩擦接触のモデル化を導入したことである．第2節では，摩擦接触を伴う破壊挙動のモデル化に対して，3次元問題に対応 …

Transactions of the Japan Society for Computational Engineering and Science 2020(0), 20200002-20200002, 2020

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5

Transient Thermal Response of a Functionally Graded Piezoelectric Laminate with an Infinite Row of Parallel Cracks Normal to the Bimaterial Interface [in Japanese]

Ueda Sei , Mabuchi Yoshiyuki

… In this paper, the fracture problem of a functionally graded piezoelectric material strip (FGPM strip) containing an infinite row of parallel cracks perpendicular to the interface between an FGPM strip and a homogeneous layer is considered. … By using the Fourier transform, the thermos-electro-mechanical fracture problem is reduced to a singular integral equation, which is solved numerically. …

Journal of Functionally Graded Materials 34(0), 1-9, 2020

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Modeling of Surface Crack Defects Developed on Shear Edge in High-strength Automotive Steel Sheets

Goto Sota , Yamazaki Kazuhiko , Doan Thi-Huyen , Funakawa Yoshimasa , Umezawa Osamu

… Cleavage fracture was responsible for the surface cracks, and micro-ductile cracks with a length of 30 µm to 40 µm were detected in the interrupted punching samples. … The critical length of the micro-ductile crack for cleavage fracture as a crack initiation site was given by linear fracture mechanics; …

ISIJ International 60(1), 143-152, 2020

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Recent verification activities on probabilistic fracture mechanics analysis code PASCAL4 for reactor pressure vessel

LU Kai , KATSUYAMA Jinya , LI Yinsheng , MIYAMOTO Yuhei , HIROTA Takatoshi , ITABASHI Yu , NAGAI Masaki , SUZUKI Masahide , KANTO Yasuhiro

… Probabilistic fracture mechanics (PFM) is considered a promising methodology in assessing the integrity of structural components in nuclear power plants because it can rationally represent the influence parameters in their probabilistic distributions without over-conservativeness. …

Mechanical Engineering Journal, 2020

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8

Effect of TiB Orientation on Near-Threshold Fatigue Crack Propagation in TiB-Reinforced Ti-3Al-2.5V Matrix Composites Treated with Heat Extrusion

Kikuchi Shoichi , Tamai Shunsuke , Kawai Takao , Nakai Yoshikazu , Kurita Hiroki , Gourdet Sophie

TiB-reinforced Ti-3Al-2.5V matrix composites, in which TiB whiskers are oriented parallel to the direction of heat extrusion, were fabricated via mechanical alloying and hot isostatic pressing (HIP). …

Materials 12(22), 3685, 2019-11

IR
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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
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Application phase analysis of very low cycle fatigue [in Japanese]

和田義孝 , 並田宜樹 , 上田魁人

計算工学講演会論文集 Proceedings of the Conference on Computational Engineering and Science 24, 4p, 2019-05
11

Finite Element Analysis of Fracture Statistics in Ceramics : Effect of Sintering Condition [in Japanese]

尾崎伸吾 , 青木祐也 , 長田俊郎

計算工学講演会論文集 Proceedings of the Conference on Computational Engineering and Science 24, 4p, 2019-05
12

Previous and Recent Studies on Fracture Mechanics of Cortical Bone : Fracture Toughness of Cortical Bone [in Japanese]

田邊裕治 , PRAMUDITA Jonas A.

非破壊検査 : 検査と材料評価 : journal of the Japanese Society for Non-destructive Inspection 68(4), 150-154, 2019-04
13

Studies of the Caustic Method and Dynamic Fracture Mechanics in Japan [in Japanese]

鈴木新一

非破壊検査 : 検査と材料評価 : journal of the Japanese Society for Non-destructive Inspection 68(4), 144-149, 2019-04
14

Construction of surrogate model for prediction of crack propagation using deep learning [in Japanese]

和田義孝

Ατομοσ : journal of the Atomic Energy Society of Japan = アトモス : 日本原子力学会誌 61(3), 237-240, 2019-03
15

Use of Fracture Mechanics Parameter for Evaluation of Physical Properties in Environmental Friendly Material with Vegetation [in Japanese]

島本由麻 , 鈴木哲也

地盤工学会誌 = Geotechnical engineering magazine : 土と基礎 67(1), 16-19, 2019-01
16

STUDY ON THE FLEXURAL FRACTURE BEHAVIORS OF HELICOIDALLY LAMINATED CFRP [in Japanese]

MATSUMOTO Takashi , ISHIZAWA Ikuma , KONDO Kenta

生体構造を模倣したらせん積層 CFRP の板曲げ挙動を実験的に検討した．一方向炭素繊維プリプレグを積層する際に層間の配向角度差を設けることでらせん積層を構成した供試体を作製している．円周支持の平板を中央点集中荷重と中央部分布荷重の条件下で，直交積層の平板と荷重一変位挙動と破壊挙動を比較した．荷重一変位挙動においては，らせん積層は中央部分布荷重下では大きな荷重降下後にも増減を繰り返 …

Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 75(2), I_581-I_588, 2019

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17

Model Experiment and Numerical Analysis of Rock-fall Protective Soil Embankment to Understand Rock Fall Trapping Performance [in Japanese]

MATSUO Kazushige , MAEDA Kenichi , HORI Kosuke , SUZUKI Kentaro , KONNO Hisashi

本研究は，落石対策工の一つである落石防護土堤に関する落石捕捉性能の把握を目的としている．落石防護土堤は，設置スペースさえあれば現地発生土の流用も可能で経済性，施工性，維持管理性に優れた落石対策工法である．しかしながら，現行の設計マニュアルである落石対策便覧では設計の考え方は落石エネルギーの吸収・消散のメカニズムの概念が文言として記されているのみであり，変形・破壊モードを考慮した性 …

Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 75(2), I_389-I_400, 2019

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18

EFFECT OF LOCAL MATERIALS AND GEOMETRIES OF WELD JOINT ROOT ON FATIGUE CRACK INITIATION AND PROPAGATION LIFE [in Japanese]

TSUTSUMI Seiichiro , SHIBATA Homare , FINCATO Riccardo

社会基盤構造物において疲労が大きな問題となっており，破損事例も多く報告されている．中でも溶接継手ルート部から発生するき裂は，溶接ビード表面からの目視による発見が困難なこともあり，疲労性能支配因子の明確化と精度の高い評価手法が重要となる．本研究では，溶接継手ルート部を起点とする疲労損傷に影響を与える諸因子について数値解析的な検討を行った．具体的には，非線形 FEM 解析および線形破 …

Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 75(2), I_467-I_476, 2019

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19

FRACTURE SIMULATION OF REINFORCED CONCRETE USING DAMAGE MODEL CONSIDERING FRICTIONAL CONTACT ON INTERFACE [in Japanese]

SOMA Yuto , KURUMATANI Mao

本論文では，著者らが提案した界面の摩擦接触を考慮した損傷モデルを用い，鉄筋とコンクリート間の付着に影響する材料界面における破壊や摩擦接触，鉄筋の節による支圧抵抗力を直接反映させた鉄筋コンクリートの破壊シミュレーション手法を構築する．そして，付着性能の異なる丸鋼と異形鉄筋の引抜き試験を模擬した破壊シミュレーションを実施し，鉄筋の表面形状のモデル化を変えるだけで，丸鋼と異形鉄筋の付着 …

Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 75(2), I_165-I_173, 2019

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20

Mechanical properties of patch plate bonded steel plate on one side under axial loading [in Japanese]

Mizutani Morimune , Sakamoto Takahiro , Ishikawa Toshiyuki , Horii Hisakazu

… Furthermore, modified bending moment at the patch ends under the unstable structurel condition was proposed, becasuse the bending moments given by the structural mechanics and FE result do not correspond each other. … Finally, by the tensile test of patch plate bonded steel plate on one side, the energy release rate and principal stress calculated from the shear and peel stresses in adhesive proposed in this study were verified using the reference fracture envelope. …

Journal of Structural Engineering, A 65A(0), 755-768, 2019

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