Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Jun Koya"'
Publikováno v:
Polymers, Vol 16, Iss 20, p 2857 (2024)
This study aims to explore the impact of load history on the premature failure of the viscoelastic polymer matrix in carbon-fiber-reinforced plastics (CFRPs) using a method based on the concept of fracture fatigue entropy (FFE). A user-defined subrou
Externí odkaz:
https://doaj.org/article/b69c921fa0734ccbb87488a0fe0beaeb
Publikováno v:
Polymers, Vol 16, Iss 13, p 1813 (2024)
To develop durable composite materials, it is crucial to elucidate the correlation between nanoscale damage in thermosetting resins and the degradation of their mechanical properties. This study aims to investigate this correlation by performing cycl
Externí odkaz:
https://doaj.org/article/bee314153eed481593f8340a9bc6826b
Autor:
Aiko Fujii, Jumpei Kajimoto, Jun Koyanagi, Yusuke Maruyama, Hideyuki Kajita, Ryosuke Matsuzaki
Publikováno v:
Composites Part C: Open Access, Vol 11, Iss , Pp 100363- (2023)
Fused filament fabrication (FFF) 3D printers have the advantages of being able to build complex structures automatically and at low cost. On the other hand, the tensile strength in the thickness direction is lower than that in the horizontal directio
Externí odkaz:
https://doaj.org/article/f97ce5c4394349b2a705a97f82fee7be
Publikováno v:
Materials, Vol 17, Iss 2, p 394 (2024)
Carbon fiber-reinforced thermoplastics (CFRTPs) have attracted attention in aerospace because of their superior specific strength and stiffness. It can be assembled by adhesive bonding; however, the existing evaluation of bonding strength is inadequa
Externí odkaz:
https://doaj.org/article/53a5ad3959594b3497004e9745f31363
Publikováno v:
Materials, Vol 17, Iss 2, p 478 (2024)
Compressive strength is one of the most important properties of carbon fiber reinforced plastics (CFRP). In this study, a new method for predicting the axial compressive strength of CFRP using the response surface method is developed. We focused on a
Externí odkaz:
https://doaj.org/article/5e0dd71034c04dcea5815110c7cf5660
Publikováno v:
Composites Part C: Open Access, Vol 10, Iss , Pp 100342- (2023)
In this study, we conduct a numerical simulation of the tensile failure of randomly oriented short fiber reinforced plastics (SFRP) by integrating an entropy damage criterion. The Mori-Tanaka theory is used as the model for the composite. The constit
Externí odkaz:
https://doaj.org/article/b157188660d74557811c4c822c7860ce
Autor:
Ryohei Fujita, Natsuko Kudo, Shun Abe, M. J. Mohammad Fikry, Jun Koyanagi, Shinji Ogihara, Hosei Nagano
Publikováno v:
Engineering Proceedings, Vol 51, Iss 1, p 34 (2023)
In this study, we proposed a non-destructive testing and evaluation (NDT&E) method for assessing the micro-scale fatigue damage of carbon-fiber-reinforced plastic (CFRP) structures. The process involves evaluating the thermophysical properties of the
Externí odkaz:
https://doaj.org/article/5357e8edbb4946c493d3fa8bd5c03a25
Publikováno v:
Materials, Vol 16, Iss 20, p 6821 (2023)
Experimental methodologies for fatigue lifetime prediction are time-intensive and susceptible to environmental variables. Although the cohesive zone model is popular for predicting adhesive fatigue lifetime, entropy-based methods have also displayed
Externí odkaz:
https://doaj.org/article/518decdd2b534855924426c0fd4fcba2
Publikováno v:
Materials, Vol 16, Iss 18, p 6120 (2023)
Fatigue failure of carbon fiber-reinforced plastics (CFRPs) under cyclic loadings has attracted the attention of researchers recently. In this study, the entropy-based failure criterion is proposed to investigate the fatigue lifetime of unidirectiona
Externí odkaz:
https://doaj.org/article/9145b0b27b664dd6a177a0d5aeb6342e
Autor:
Takayuki Inomata, Nobuhiro Tahara, Kazufumi Nakamura, Jin Endo, Mitsuharu Ueda, Tomonori Ishii, Yoshinobu Kitano, Jun Koyama
Publikováno v:
ESC Heart Failure, Vol 8, Iss 4, Pp 2647-2659 (2021)
Abstract Wild‐type transthyretin amyloid cardiomyopathy (ATTRwt‐CM) is caused by the deposition of wild‐type transthyretin (TTR) amyloid fibrils in the heart. The age at diagnosis of ATTRwt‐CM is reported to be approximately 70–80 years, an
Externí odkaz:
https://doaj.org/article/0d7c487ccdff42b6959d0790682fc73c