Takashi Ishikawa
Nagoya University
Composite numberUltimate tensile strengthFinite element methodMatrix (mathematics)Composite laminatesComposite materialEpoxyTensile testingMaterials scienceImage stitchingCompressive strengthFracture (geology)Ceramic matrix compositeFiberFracture mechanicsStructural engineeringDelaminationBucklingStress (mechanics)Fracture toughness
187Publications
34H-index
4,262Citations
Publications 180
Newest
#1Keita Goto (Nagoya University)H-Index: 4
#2Masahiro Arai (Nagoya University)H-Index: 13
Last. Takashi Ishikawa (Nagoya University)H-Index: 34
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Abstract The compressive fracture aspect for the thick quasi-isotropic carbon fiber reinforced plastic (CFRP) laminates was investigated using a high-speed camera to clarify the progress of the brooming fracture. The compressive fracture types of the laminates could be classified into two groups, i.e., the fractures initiating from the innermost 0 ∘ ply and those initiating from the fixed sections of the specimen. The standard deviation of the compressive strength for the innermost 0 ∘ ply-initi...
7 CitationsSource
#1Keita Goto (Nagoya University)H-Index: 4
#2Kenta Imai (Nagoya University)H-Index: 1
Last. Takashi Ishikawa (Nagoya University)H-Index: 34
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Abstract The shear and tensile strengths of carbon fiber-reinforced thermoplastic (CFRTP) laminate joints by ultrasonic welding were investigated by lap shear tests (LSTs) and cross tensile tests (CTTs). The adherends were the cross-ply and the twill woven CFRTP laminates, and the flat energy director (FED) was used to clarify its effectiveness. A modified jig and testing method for CTTs were newly proposed. In each test, the strengths were calculated in two ways: by indicators of “welding effic...
16 CitationsSource
#1Kazuyuki Segawa (Nagoya University)
#2Makoto Ichiki (Nagoya University)
Last. Takashi Ishikawa (Nagoya University)H-Index: 34
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#1Mariko Terada (Nagoya University)H-Index: 1
#2Atsuhiko Yamanaka (Nagoya University)H-Index: 11
Last. Takashi Ishikawa (Nagoya University)H-Index: 34
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Fiber length and its distribution are important factors to determine the mechanical properties of discontinuous carbon fiber-reinforced composites. For the efficient and easy measurement of fiber length, an optical image scanner was introduced into the measurement procedure. The scan image allowed to measure approximately 25,000 carbon fibers. The measured values ( ) and mean value of these ( ) were evaluated by comparison with reference values ( ) obtained using an optical microscope. were depe...
1 CitationsSource
#1Takashi Ishikawa (Nagoya University)H-Index: 34
#2Kazuaki Amaoka (Nagoya University)H-Index: 1
Last. Jun Takahashi (UTokyo: University of Tokyo)H-Index: 28
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Abstract The recent status of Japan's government-driven project to establish carbon fiber reinforced thermoplastic composites (CFRTP) technology for automotive applications conducted in the National Composites Center (NCC) Japan is introduced first. The baseline technology is discontinuous carbon fiber reinforced thermoplastic composites (C-LFT-D: carbon – long fiber thermoplastic-direct) using press compaction. All the components of the target car chassis made of aluminum alloy are replaced by ...
80 CitationsSource
#1Makoto Ichiki (Nagoya University)
Last. Takashi Ishikawa (Nagoya University)H-Index: 34
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#1Masahiro Arai (Nagoya University)H-Index: 13
#2Keita Goto (Nagoya University)H-Index: 4
Last. Ryohei Otake (Nagoya University)
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#1Toshio Ogasawara (TUAT: Tokyo University of Agriculture and Technology)H-Index: 28
#2Takashi Ishikawa (Nagoya University)H-Index: 34
This study proposes and assesses a simple test method (NAL-II) to evaluate compressive properties of carbon fiber-reinforced polymer matrix composite laminates (CFRP). Compressive tests based on ASTM D6641 and NAL-II methods were conducted for direct comparison using three kinds of quasi-isotropic composite laminates (T800H/3633, T800S/3900-2B, and IM600/133). Stress–strain curves including the compressive modulus obtained using the NAL-II method showed good agreement with those obtained using t...
6 CitationsSource
#1Yuichi Masubuchi (Nagoya University)H-Index: 26
#2Mariko Terada (Nagoya University)H-Index: 1
Last. Takashi Ishikawa (Nagoya University)H-Index: 34
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Abstract Due to the strong correlation with material properties, fiber length distribution in polymer composites has been extensively investigated. The distribution exhibits steep increase until a peak followed by a long tail decay, which has been analyzed in terms of Weibull distribution. However, interpretation of the stochastic process behind Weibull distribution is not trivial, particularly for the shape parameter. In this study, a simple distribution function is proposed based on the two Po...
12 CitationsSource
#1Naoto NogawaH-Index: 1
#2Masahiro AraiH-Index: 13
Last. Takashi IshikawaH-Index: 34
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