Numerical analysis of residual stress distribution on peening process

Ikushima, Kazuki*; Shibahara, Masakazu*; Akita, Koichi; Suzuki, Hiroshi; Morooka, Satoshi; Nishikawa, Satoru*; Furukawa, Takashi*

Welding in the World, 61(3), p.517 - 527, 2017/05

http://doi.org/10.1007/s40194-017-0430-4

In this study, first, an analysis method to predict the behaviour of residual stress distribution on shot peening process was proposed. In the proposed method, the load distribution on the collision of shots was modelled, and it was integrated with the dynamic analysis method based on the idealized explicit FEM (IEFEM). The accuracy of the proposed analysis system was confirmed by comparing the stress distribution on the collision of a single shot with the results analyzed by ABAQUS. The thermal elastic plastic analysis method using IEFEM was applied to the analysis of residual stress distribution of multi-pass welded pipe joint. The calculated residual stress distribution was compared with the measured residual stress distribution using X-ray diffraction (XRD). As a result, it was shown that the both welding residual distribution agree well with each other. Considering the calculated welding residual stress distribution, the modification of stress distribution due to shot peening was predicted by the proposed analysis system. As a result, the similar stress distribution with measurement by XRD was obtained in case that a large number of collisions are considered.

Nonlinear analysis of thermal stress fracture of graphite material

Nihon Kikai Gakkai Heisei-7-Nendo Zairyo Rikigaku Bumon Koenkai Koen Rombunshu, Vol.A, 0, p.413 - 414, 1995/00

no abstracts in English

Finite element analysis of stress relaxation behavior on shot peening

Kitamura, Yoshisato*; Okada, Takashi*; Ikushima, Kazuki*; Shibahara, Masakazu*; Nishikawa, Satoru*; Akita, Koichi

no journal, , 

no abstracts in English

Evaluation of the sustainability of compressive residual stress by introduced a stress improvement method, 1; Development of analysis method of the shot peening using idealized explicit FEM

Yamada, Yusuke*; Shibahara, Masakazu*; Ikushima, Kazuki*; Kitani, Yuji*; Nishikawa, Satoru*; Furukawa, Takashi*; Akita, Koichi; Suzuki, Hiroshi; Morooka, Satoshi

no journal, , 

no abstracts in English

Study on optical sound measurement for the in-situ diagnostic system under high radiation environments

Murata, Atsushi*; Saruta, Koichi; Wakui, Takashi; Li, Y.*; Tsutsui, Kihei*; Futakawa, Masatoshi

no journal, , 

Vibration and sound have been used in diagnosis of mechanical structures in a variety of industries. Under high radiation environments, however, conventional electric sensors such as an accelerometer and a microphone are not suitable especially for in-situ diagnostic systems in nuclear reactors, spallation neutron source systems, etc. since electric signals become degraded by background radiation noise. In this study, the applicability of the optical sound measurement using an laser Doppler vibrometer was investigated through the comparison between fundamental experimental results and 3D FEM analyses (LS-DYNA) for the purpose of developing an in-situ diagnostic system of a mercury target.