Toshio Ogasawara
Tokyo University of Agriculture and Technology
Composite numberUltimate tensile strengthFinite element methodMatrix (mathematics)Composite laminatesCreepComposite materialEpoxyFlexural strengthMaterials sciencePolyimideSic fiberCompressive strengthCeramic matrix compositeCarbon nanotubeFiberPolymerStructural engineeringBendingFracture toughness
260Publications
29H-index
3,024Citations
Publications 252
Newest
#1Mae Oiwa (TUAT: Tokyo University of Agriculture and Technology)H-Index: 1
#2Toshio Ogasawara (TUAT: Tokyo University of Agriculture and Technology)H-Index: 29
Last. Takahira Aoki (UTokyo: University of Tokyo)H-Index: 16
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Abstract The objective of this study is to establish a bending strength prediction method for a thin CFRP face sheet / Nomex honeycomb sandwich panel, for which the failure mode is face-sheet / core debonding derived from local buckling of the face sheet. Stress and buckling eigenvalue analyses were conducted using a detailed core model reproducing honeycomb structure and a solid core model in which the core was homogenized as solid elements. In both the detailed model and the solid core model, ...
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#1Kanazawa Shingo (IHI Corporation)H-Index: 1
#2Naoki Yamazaki (IHI Corporation)H-Index: 1
Last. Toshio Ogasawara (TUAT: Tokyo University of Agriculture and Technology)H-Index: 29
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#1Kota Takamoto (TUAT: Tokyo University of Agriculture and Technology)H-Index: 1
#2Toshio Ogasawara (TUAT: Tokyo University of Agriculture and Technology)H-Index: 29
Last. Tomohiro Yokozeki (UTokyo: University of Tokyo)H-Index: 28
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Abstract Thin prepregs with thickness of less than 0.06 mm support flexible lamination design because it is possible to apply various stacking sequences. The objective of this study is to elucidate the effects of the layer thickness and stacking sequence on the open-hole compressive (OHC) strength for thin-ply carbon fiber reinforced plastic composite (CFRP) laminates. Details of layer thickness and stacking sequence effects on the OHC strength for the thin-ply CFRP laminates were evaluated expe...
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#1Ryuunosuke Minegishi (TUAT: Tokyo University of Agriculture and Technology)
#2Toshio Ogasawara (TUAT: Tokyo University of Agriculture and Technology)H-Index: 29
Last. Yuichi Ishida (JAXA: Japan Aerospace Exploration Agency)H-Index: 9
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A phenyl–ethynyl terminated polyimide resin based on KAPTON-type backbone structures, ‘TriA-X’, polyimide is promising as a matrix resin of heat-resistant carbon fiber reinforced plastic composites...
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#1Ryoma AokiH-Index: 2
#2Ryo HiguchiH-Index: 20
Last. Toshio OgasawaraH-Index: 29
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#1Yoshito Ikarashi (TUAT: Tokyo University of Agriculture and Technology)H-Index: 1
#2Toshio Ogasawara (TUAT: Tokyo University of Agriculture and Technology)H-Index: 29
Last. Takuya Aoki (JAXA: Japan Aerospace Exploration Agency)H-Index: 5
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Abstract This paper presents a micromechanical model to predict the time-dependent damage and deformation behavior of an orthogonal 3-D woven SiC fiber/BN interface/SiC matrix composite under constant tensile loading at elevated temperature in vacuum. In-situ observation under monotonic tensile loading at room temperature, load–unload tensile testing at 1200 °C in argon, and constant load tensile testing at 1200 °C in vacuum were conducted to investigate the effects of microscopic damage on defo...
1 CitationsSource
#1Toshio Ogasawara (TUAT: Tokyo University of Agriculture and Technology)H-Index: 29
#2Hajime Yoshinaga (TUAT: Tokyo University of Agriculture and Technology)H-Index: 1
Last. Akinori Yoshimura (Nagoya University)H-Index: 12
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Failure mechanism of sandwich panels is very complicated. The objective of this study is to demonstrate the usefulness of high-speed observation to elucidate the failure mechanism of sandwich panel...
1 CitationsSource
#1Sota Oshima (TUAT: Tokyo University of Agriculture and Technology)H-Index: 3
#2Akinori Yoshimura (Nagoya University)H-Index: 12
Last. Toshio Ogasawara (TUAT: Tokyo University of Agriculture and Technology)H-Index: 29
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Abstract Mode II fracture toughness tests for a type of double-lap joint referred to as the doubly end notched tension (DENT) tests were validated by experimental and numerical approaches. Crack growth behavior of two cracks was simultaneously observed during fracture toughness tests and analyzed by the digital image correlation (DIC) method. As one of the two cracks propagated first and the other followed, finite element (FE) analyses were carried out to clarify the mechanisms. The results of F...
1 CitationsSource
#1Masahito Yamazaki (TUAT: Tokyo University of Agriculture and Technology)
#2Shota Kawasaki (TUAT: Tokyo University of Agriculture and Technology)
Last. Yuichi Ishida (JAXA: Japan Aerospace Exploration Agency)H-Index: 9
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#1Shintaro Kamiyama (TUAT: Tokyo University of Agriculture and Technology)H-Index: 3
#2Yoshiyasu Hirano (JAXA: Japan Aerospace Exploration Agency)H-Index: 20
Last. Toshio Ogasawara (TUAT: Tokyo University of Agriculture and Technology)H-Index: 29
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Abstract This study examined lightning strike damage behaviors of carbon fiber reinforced plastic (CFRP) laminates under air (0.1 MPa), reduced-pressure air (0.02 MPa), and N2 (0.1 MPa) environments to elucidate the effects of atmospheric environments on lightning damage. Simulated lightning current in accordance with SAE-ARP 5412B was applied to each specimen. The maximum current peak value was defined as 40 kA. CFRP laminates under reduced-pressure air (0.02 MPa) exhibited slight damage compar...
3 CitationsSource