The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform
Masao Sakane - One of the best experts on this subject based on the ideXlab platform.
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Low Cycle Fatigue testing using miniature specimens
International Journal of Fatigue, 2020Co-Authors: Mineo Nozaki, Masao Sakane, Masaharu FujiwaraAbstract:Abstract This study discussed a low Cycle Fatigue testing method using miniature specimens of SUS304 stainless steel and S35C carbon steel. A stable low Cycle Fatigue testing method was developed for miniature specimens with a 1 mm diameter that gives similar low Cycle Fatigue lives of bulk specimens with a 6.5 mm diameter. The testing method assessed the effects of surface roughness and residual stress. The results showed that low Cycle Fatigue damage could be evaluated using miniature specimens taken from the cracked parts of bulk specimens.
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Cracking directions in multiaxial low Cycle Fatigue at high and room temperatures
Fracture and Structural Integrity, 2017Co-Authors: Masao Sakane, Takamoto ItohAbstract:Cracking direction in multiaxial low Cycle Fatigue is an important research subject because crack initiation and propagation behavior is a physical background for developing an estimation method of multiaxial low Cycle Fatigue lives. However, there are a few open questions on cracking direction in multiaxial low Cycle Fatigue because cracking direction in multiaxial low Cycle Fatigue is complex and changes depending on stress multiaxiality, strain range, notch and material. This paper overviews cracking directions in tension-torsion low Cycle Fatigue of low alloy steels and nickel base superalloys. Two types of cracking directions in these materials, maximum shear direction and maximum principal direction, are discussed in relation with strain multiaxiality and an existence of notch and precrack. The two cracking directions in torsion low Cycle Fatigue of SUS 304 stainless steel are also discussed in relation with strain range. Detailed micro crack observations are finally presented to discuss the two cracking directions in torsion low Cycle Fatigue of a SUS 304 unnotched specimen.
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Tensile and low Cycle Fatigue standard testing for solders - JSMS recommendation
2013Co-Authors: Masao Sakane, Minoru Mukai, Haruo Nose, Makoto Kitano, Hiroyuki Takahashi, Yuji TsukaAbstract:This paper proposes the tensile and low Cycle Fatigue standard testing for lead and lead-free solders. There is no standard method for solder testing, which causes a large scatter in material data of solders. The solder strength working group in the committee on high temperature strength of materials, Japan Society of Material Strength, issued the tensile and low Cycle Fatigue standards for solder testing. The standards recommend the casting method, specimen shape and heat treatment, strain rate and other testing methods needed for tensile and low Cycle Fatigue testing of solders. Benchmark testing using Sn-37Pb and Sn-3.5Ag solders, based on the standard methods, demonstrated that these standards generate the reliable data with a small scatter. The tensile and low Cycle Fatigue database was built based on the standards for the two solders.
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Notch effect on multiaxial low Cycle Fatigue
International Journal of Fatigue, 2011Co-Authors: Masao Sakane, Shengde ZhangAbstract:Abstract This paper discusses the notch effect on multiaxial low Cycle Fatigue. Neuber’s rule was firstly introduced to estimate local strains at the notch root in proportional tension and torsion loading. The Neuber’s rule was applied to estimate crack initiation and propagation lives in tension–torsion low Cycle Fatigue. The rule conservatively estimated the crack initiation life in tension low Cycle Fatigue and appropriately in torsion low Cycle Fatigue. A simple method for estimating the local strain at the notch root was proposed in tension and torsion loading. The notch effect in nonproportional low Cycle Fatigue was discussed in two materials. The local strain at the notch root obtained by finite element analysis underestimated the crack initiation lives for the additional hardening material but that obtained by the Neuber’s rule overestimated for the non-additional hardening material.
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High Temperature Multiaxial Low Cycle Fatigue of Cruciform Specimen
Journal of Engineering Materials and Technology-transactions of The Asme, 1994Co-Authors: Takamoto Itoh, Masao Sakane, Masateru OhnamiAbstract:This paper describes high temperature multiaxial low Cycle Fatigue lives of type SUS304 stainless steel and 1Cr-1Mo-1/4V steel cruciform specimens at 923 K and 823 K in air. Strain controlled multiaxial low Cycle Fatigue tests were carried out using cruciform specimens at the principal strain ratios between [minus]1 and 1. The principal strain ratio had a significant effect on low Cycle Fatigue lives. Fatigue lives drastically decreased as the principal strain ratio increased. Multiaxial low Cycle Fatigue strain parameters were applied to the experimental data and the applicability of the parameter was discussed. The equivalent strain based on crack opening displacement (COD strain) developed in the paper and [Gamma][sup *] -- plane parameter successfully predicted multiaxial low Cycle Fatigue lives. The crack morphology was also extensively discussed from not only the surface crack direction but also the crack inclination into the specimen.
Takamoto Itoh - One of the best experts on this subject based on the ideXlab platform.
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Cracking directions in multiaxial low Cycle Fatigue at high and room temperatures
Fracture and Structural Integrity, 2017Co-Authors: Masao Sakane, Takamoto ItohAbstract:Cracking direction in multiaxial low Cycle Fatigue is an important research subject because crack initiation and propagation behavior is a physical background for developing an estimation method of multiaxial low Cycle Fatigue lives. However, there are a few open questions on cracking direction in multiaxial low Cycle Fatigue because cracking direction in multiaxial low Cycle Fatigue is complex and changes depending on stress multiaxiality, strain range, notch and material. This paper overviews cracking directions in tension-torsion low Cycle Fatigue of low alloy steels and nickel base superalloys. Two types of cracking directions in these materials, maximum shear direction and maximum principal direction, are discussed in relation with strain multiaxiality and an existence of notch and precrack. The two cracking directions in torsion low Cycle Fatigue of SUS 304 stainless steel are also discussed in relation with strain range. Detailed micro crack observations are finally presented to discuss the two cracking directions in torsion low Cycle Fatigue of a SUS 304 unnotched specimen.
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material dependence of multiaxial low Cycle Fatigue lives under non proportional loading
International Journal of Fatigue, 2011Co-Authors: Takamoto Itoh, Tao YangAbstract:This study discusses evaluation of material dependence of multiaxial low Cycle Fatigue to develop a suitable strain parameter for life estimation under non-proportional loading. It has been reported that Fatigue lives are reduced accompanying an additional hardening under strain controlled non-proportional loading in which principal directions of stress and strain are changed in a Cycle. Strain controlled multiaxial low Cycle Fatigue tests under proportional and non-proportional strain paths were carried out using hollow cylinder specimens of several materials. The reduction in low Cycle Fatigue life due to non-proportional loading is discussed relating to the additional cyclic hardening behaviors and its material dependence. Material constant, α, used in strain parameter for life estimation under non-proportional multiaxial low Cycle Fatigue is also discussed.
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High Temperature Multiaxial Low Cycle Fatigue of Cruciform Specimen
Journal of Engineering Materials and Technology-transactions of The Asme, 1994Co-Authors: Takamoto Itoh, Masao Sakane, Masateru OhnamiAbstract:This paper describes high temperature multiaxial low Cycle Fatigue lives of type SUS304 stainless steel and 1Cr-1Mo-1/4V steel cruciform specimens at 923 K and 823 K in air. Strain controlled multiaxial low Cycle Fatigue tests were carried out using cruciform specimens at the principal strain ratios between [minus]1 and 1. The principal strain ratio had a significant effect on low Cycle Fatigue lives. Fatigue lives drastically decreased as the principal strain ratio increased. Multiaxial low Cycle Fatigue strain parameters were applied to the experimental data and the applicability of the parameter was discussed. The equivalent strain based on crack opening displacement (COD strain) developed in the paper and [Gamma][sup *] -- plane parameter successfully predicted multiaxial low Cycle Fatigue lives. The crack morphology was also extensively discussed from not only the surface crack direction but also the crack inclination into the specimen.
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HIGH TEMPERATURE MULTIAXIAL LOW Cycle Fatigue USING CRUCIFORM SPECIMEN
Mechanical Behaviour of Materials VI, 1992Co-Authors: Takamoto Itoh, Masao Sakane, Masateru OhnamiAbstract:ABSTRACT This paper describes the high temperature multiaxial low Cycle Fatigue of type 304 stainless and 1Cr-1Mo-1/4V cruciform specimens at 823K and 923K in air. Strain controlled multiaxial low Cycle Fatigue tests were carried out at the principal strain ratios between -1 and 1. The principal strain ratio had a significant effect on low Cycle Fatigue lives. Fatigue lives drastically decreased as the principal strain ratio increased. Several multiaxial low Cycle Fatigue strain parameters were applied to the experimental data and the applicability of the parameters was discussed.
Kai Liu - One of the best experts on this subject based on the ideXlab platform.
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A review on ultra-high Cycle Fatigue of CFRP
Composite Structures, 2021Co-Authors: Junliang Ding, Li Cheng, Xuan Chen, Chao Chen, Kai LiuAbstract:Abstract Ultra-high Cycle Fatigue problem has received more and more attention with the continuous improvement of the reliability and life index of modern equipment, and has become a hot spot in Fatigue research. As the non-metallic material with the most application potential in the modern aviation industry, the ultra-high Cycle Fatigue problem of carbon fiber reinforced plastic (CFRP) is the most prominent. In this paper, the research progress of ultra-high Cycle Fatigue research of CFRP has been systematically sorted out and summarized from three dimensions of test method, Fatigue fracture macro-micro characteristics and Fatigue damage model construction, including the adopted technical methods, the mechanism of Fatigue crack initiation, the characteristics of S-N curve, Goodman diagram and the influence of humidity and other influence factors. The mechanism, evolution and model of CFRP ultra-high Cycle Fatigue damage are expounded, and the problems existing in the ultra-high Cycle Fatigue research of CFRP are presented.
Xuan Chen - One of the best experts on this subject based on the ideXlab platform.
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A review on ultra-high Cycle Fatigue of CFRP
Composite Structures, 2021Co-Authors: Junliang Ding, Li Cheng, Xuan Chen, Chao Chen, Kai LiuAbstract:Abstract Ultra-high Cycle Fatigue problem has received more and more attention with the continuous improvement of the reliability and life index of modern equipment, and has become a hot spot in Fatigue research. As the non-metallic material with the most application potential in the modern aviation industry, the ultra-high Cycle Fatigue problem of carbon fiber reinforced plastic (CFRP) is the most prominent. In this paper, the research progress of ultra-high Cycle Fatigue research of CFRP has been systematically sorted out and summarized from three dimensions of test method, Fatigue fracture macro-micro characteristics and Fatigue damage model construction, including the adopted technical methods, the mechanism of Fatigue crack initiation, the characteristics of S-N curve, Goodman diagram and the influence of humidity and other influence factors. The mechanism, evolution and model of CFRP ultra-high Cycle Fatigue damage are expounded, and the problems existing in the ultra-high Cycle Fatigue research of CFRP are presented.
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Effects of TiN coating on the high-Cycle-Fatigue and very-high-Cycle-Fatigue properties of Ti-6Al-4V alloy
International Journal of Materials Research, 2018Co-Authors: Lu Kaiju, Li Cheng, Xuan ChenAbstract:Abstract This work examined the effects of a TiN coating on the high-Cycle-Fatigue (HCF) and very-high-Cycle-Fatigue (VHCF) properties of the Ti-6Al-4V alloy using a three-point bending ultrasonic ...
Tao Yang - One of the best experts on this subject based on the ideXlab platform.
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material dependence of multiaxial low Cycle Fatigue lives under non proportional loading
International Journal of Fatigue, 2011Co-Authors: Takamoto Itoh, Tao YangAbstract:This study discusses evaluation of material dependence of multiaxial low Cycle Fatigue to develop a suitable strain parameter for life estimation under non-proportional loading. It has been reported that Fatigue lives are reduced accompanying an additional hardening under strain controlled non-proportional loading in which principal directions of stress and strain are changed in a Cycle. Strain controlled multiaxial low Cycle Fatigue tests under proportional and non-proportional strain paths were carried out using hollow cylinder specimens of several materials. The reduction in low Cycle Fatigue life due to non-proportional loading is discussed relating to the additional cyclic hardening behaviors and its material dependence. Material constant, α, used in strain parameter for life estimation under non-proportional multiaxial low Cycle Fatigue is also discussed.
