Zobrazeno 1 - 10
of 239
pro vyhledávání: '"Tomohiro SASAKI"'
Autor:
Hidefumi Takahashi, Tomohiro Sasaki, Akitoshi Nakano, Kazuto Akiba, Masayuki Takahashi, Alex H. Mayo, Masaho Onose, Tatsuo C. Kobayashi, Shintaro Ishiwata
Publikováno v:
npj Quantum Materials, Vol 8, Iss 1, Pp 1-7 (2023)
Abstract Given the rarity of metallic systems that exhibit ferroelectric-like transitions, it is apparently challenging to find a system that simultaneously possesses superconductivity and ferroelectric-like structural instability. Here, we report th
Externí odkaz:
https://doaj.org/article/313308a9eefd493285ca3f810ff160d9
Publikováno v:
Materials, Vol 16, Iss 20, p 6676 (2023)
Accumulation and concentration of debris in deep hole electrical discharge machining (EDM) significantly hinder its machining efficiency and accuracy. It is believed that the movement of bubbles associated with the discharge gap flow field play a piv
Externí odkaz:
https://doaj.org/article/b36b10d0398c428185efc602a671d3fb
Publikováno v:
Materials, Vol 15, Iss 18, p 6330 (2022)
This paper deals with a non-destructive analysis of residual stress through the visualization of deformation behaviors induced by a local spot heating. Deformation was applied to the surface of an aluminum alloy with an infrared spot laser. The heati
Externí odkaz:
https://doaj.org/article/39a489bcca704fe6be94040d2405e2c2
Publikováno v:
Materials, Vol 14, Iss 6, p 1530 (2021)
The deformation and fracture mechanism in 7075 aluminum alloy is discussed based on a field theoretical approach. A pair of peak-aged and overaged plate specimens are prepared under the respective precipitation conditions, and their plastic deformati
Externí odkaz:
https://doaj.org/article/fc508da946ca4f8facc8c24e8c849bfc
Publikováno v:
Applied Sciences, Vol 10, Iss 16, p 5524 (2020)
The application of a recent field theory of deformation and fracture to nondestructive testing (NDT) is discussed. Based on the principle known as the symmetry of physical laws, the present field theory formulates all stages of deformation including
Externí odkaz:
https://doaj.org/article/2fede3f1322e4fd5bc21c574cff87e4b
Autor:
Sanichiro Yoshida, Tomohiro Sasaki
Publikováno v:
Materials, Vol 13, Iss 6, p 1363 (2020)
A method to diagnose the deformation status of solid objects under loading is discussed. The present method is based on a recent field theory of deformation and fracture and optical interferometry known as the Electronic Speckle-Pattern Interferometr
Externí odkaz:
https://doaj.org/article/373566596ac843babb556100efa3dca5
Publikováno v:
Metals, Vol 9, Iss 5, p 505 (2019)
A cylindrical tool was applied for ultrasonic bonding of multi-layered copper foil and a copper sheet to prevent damage to the foil during bonding. The strength of the joints bonded with the cylindrical tool was comparable to that of the joints bonde
Externí odkaz:
https://doaj.org/article/60514d7bd8c544ac8892ad04427e52d6
Publikováno v:
Applied Sciences, Vol 8, Iss 7, p 1026 (2018)
This study reports the application of an optoacoustic method for evaluating the bonding strength of ultrasonically bonded joints in a non-destructive and non-contact fashion. It is proposed that the bonding strength is correlated with the resonant fr
Externí odkaz:
https://doaj.org/article/6fdee630d4284e388195247586fe748e
Autor:
Sanichiro Yoshida, David R. Didie, Daniel Didie, Tomohiro Sasaki, Hae-Sung Park, Ik-Keun Park, David Gurney
Publikováno v:
Applied Sciences, Vol 6, Iss 6, p 163 (2016)
The elastic property of the film-substrate interface of thin-film systems is characterized with an opto-acoustic method. The thin-film specimens are oscillated with an acoustic transducer at audible frequencies, and the resultant harmonic response of
Externí odkaz:
https://doaj.org/article/96364d2e5a0349268c2ece28264c6663
Autor:
Sanichiro Yoshida, Tomohiro Sasaki, Masaru Usui, Shuichi Sakamoto, David Gurney, Ik-Keun Park
Publikováno v:
Materials, Vol 9, Iss 2, p 112 (2016)
Co-application of acoustoelasticity and optical interferometry to residual stress analysis is discussed. The underlying idea is to combine the advantages of both methods. Acoustoelasticity is capable of evaluating a residual stress absolutely but it
Externí odkaz:
https://doaj.org/article/1c482c9b698e47c993eaf262e606c9a6