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横浜国立大学 笠井研究室

   English version

研究内容

                     

The main research consists of nondestructive inspection technologies
for materials and structures, fracture accident prevention technologies,
industrial accidents statistics analyses and risk analysis.

笠井研究室では、各種モニタリング技術、統計的リスク解析技術、リスクベースメンテナンス等の
研究を行っております。



Call for good quality NDE papers: Special Issue of Metals of MDPI
(Impact Factor 2.117, Q1category of Metallurgy & Metallurgical Engineering, Web of Science)

 





Dear Colleagues,
Every country is currently facing serious issues around aging facilities in industrial plants and aging components of infrastructure. For instance, in Japan, we predict that more than half of our ethylene plants will have surpassed 50 years of operation by 2022. With regard to infrastructure, as the majority of our bridges and tunnels were built in the 1950s to 1960s, it means that our infrastructure is already over 50 years old.



To make a decision about proper maintenance for aging facilities in plants and aging components of infrastructure, the NDE method is a key technology, since it provides important information regarding their material damage, such as the length and the depth of corrosion and cracks. In addition, it is important to marry proper maintenance with reduced cost, including that of the NDE method. 



The aim of this Special Issue is to present the advanced and innovative NDE methods, including through theoretical and experimental studies, and contribute to making a decision for the proper maintenance of aging facilities in industrial plants and aging components of infrastructure. We expect contributions to the Special Issue from scholars and researchers all over the world both in the academic and industrial fields.

Assoc. Prof. Naoya Kasai
Guest Editor



Our research of "Application of risk curve for statistical analysis of backside corrosion in the bottom floors of oil storage tanks" was posted on the website of Advances in Engineering on 27th October.















新しく開発した渦電流プローブによるシミュレーション




赤外線を用いて可燃性ガスを検知する様子。




渦流探傷法で欠陥を検知するシミュレーション①




渦流探傷法で欠陥を検知するシミュレーション②













修了生の就職先

笠井研究室の最近の就職先としては、東京ガス、トヨタ自動車、東北電力、北陸電力、中部電力、三菱重工業、旭硝子、東燃ゼネラル、千代田化工建設、日新製鋼、 などです。OBの就職先の一覧が見たい学生は、笠井のところへおこし下さい。



Our research of "Application of risk curve for statistical analysis of backside corrosion in the bottom floors of oil storage tanks" was posted on the website of Advances in Engineering on 27th October.


My research papers as follows.
[OPEN ACCESS]Atmospheric Corrosion Sensor Based on Strain Measurement with Active–Dummy Fiber Bragg Grating Sensors, Metals 10 (8), 1076A
[OPEN ACCESS]A Uniform Eddy Current Probe with a Double-Excitation Coil for Flaw Detection on Aluminium Plates, Metals, 2019, 9(10), 1116
[OPEN ACCESS]Flaw Detection in Aluminum Plates Using a Rotating Uniform Eddy Current Probe with Two Pairs of Excitation Coils, Metals, 2019, 9(10), 1069



Real-time aerosol chloride deposition measuring device using a conductivity sensor, Atmospheric Environment, Volume 213, 15 September 2019, Pages 757-766
Simplified approach to evaluating safety distances for hydrogen vehicle fuel dispensers, International Journal of Hydrogen Energy, Volume 44, Issue 33, 5 July 2019, Pages 18639-18647
[OPEN ACCESS]Atmospheric Corrosion Sensor Based on Strain Measurement with an Active Dummy Circuit Method in Experiment with Corrosion Products, Metals
[OPEN ACCESS]The Improvement of Flaw Detection by the Configuration of Uniform Eddy Current Probes (Review Article), Sensors
[OPEN ACCESS]A new analysis of wind on chloride deposition for long-term aerosol chloride deposition monitoring with weekly sampling frequency,Atmospheric Environment
[OPEN ACCESS] Evaluation of Safety Measures of a Hydrogen Fueling Station Using Physical Modeling, Sustainability 2018, 10(11), 3846, (2018)
Barkhausen Noise Measurement System Using a Three-Pole Probe, Journal of Nondestructive Evaluation, (2018)
[OPEN ACCESS]A Robust Fiber Bragg Grating Hydrogen Gas Sensor Using Platinum-Supported Silica Catalyst Film , Journal of Sensors, 2018(1)
[OPEN ACCESS]Development of Amplifier Circuit by Active-Dummy Method for Atmospheric Corrosion Monitoring in Steel Based on Strain Measurement, Metals. 2018; 8(1):5
[OPEN ACCESS]Simulation-based safety investigation of a hydrogen fueling station with an on-site hydrogen production system involving methylcyclohexane, International Journal of Hydrogen Energy
 ・Atmospheric corrosion sensor based on strain measurement, Measurement Science and Technology, 28 (1), 015106
 ・[OPEN ACCESS]Leakage-type-based analysis of accidents involving hydrogen fueling stations in Japan and USA, Volume 41, Issue 46, 14 December 2016, Pages 21564-215705
Mechanism for Corrosion Prevention by a Mechanical Plating of Uniform Zinc-Iron Alloy, Journal of Materials Engineering and Performance, November 2016, Volume 25, Issue 11, pp 4680?4685 ・Predicting maximum depth of corrosion using extreme value analysis and Bayesian inference, International Journal of Pressure Vessels and Piping, 2016
・The qualitative risk assessment of an electrolytic hydrogen generation system, International Journal of Hydrogen Energy 41 (30), 13308-13314, 2016
・Application of risk curve for statistical analysis of backside corrosion in the bottom floors of oil storage tanks, International Journal of Pressure Vessels and Piping 141, 19-25, 2016
・Preliminary hazard identification for qualitative risk assessment on a hybrid gasoline-hydrogen fueling station with an on-site hydrogen production system using organic chemical hydride, International Journal of Hydrogen Energy 41 (18), 7518-7525, 2016
[OPEN ACCESS]Effect of gasoline pool fire on liquid hydrogen storage tank in hybrid hydrogen?gasoline fueling station, International Journal of Hydrogen Energy 41 (3), 2096-2104, 2016
・Degradation of Anticorrosive Organic Coating Applied to Inner Bottom Plate of Oil Storage Tank By a Large Scale Earthquake, Meeting Abstracts, 622-622, 2015
・Risk assessment for a gas and liquid Hydrogen fueling station, AIChE
Study on the effect of elastic stress and microstructure of low carbon steels on Barkhausen noise, Journal of Nondestructive Evaluation., September 2013, Volume 32, Issue 3, pp. 277-285
・Accident occurrence model for the risk analysis of industrial facilities, Reliability Engineering & System Safety, Volume 114, June 2013, Pages 71?74
Development of an Eddy Current Inspection Technique with Surface Magnetization to Evaluate the Carburization Thickness of Ethylene Pyrolysis Furnace Tubes, Journal of Nondestructive Evaluation, Volume 31, Issue 4 , pp 349-356 (2012)
Experimental and Analytical Investigations ofAcoustic Wave Propagation using a Reservoir and an Acoustic Lens, Materials Evaluation, Vol. 70, No.4, pp.470-478.(2012) 
・Experimental and analytical study for detectability of the back-side flaws of flat ferromagnetic plates by RFECT, NDT & E International, Volume 44, Issue 8, December 2011, Pages 703-707
・Quantitative investigation of a standard test shim for magnetic particle testing, NDT & E International, 44(5):421-426 (2011) 
・Propane gas leak detection by infrared absorption using carbon infrared emitter and infrared camera, NDT & E International, 44(1):57-60. (2011)
Detection of carburization in ethylene pyrolysis furnace tubes by a C core probe with magnetization, Journal of Nondestructive Evaluation, Volume: 29, Issue: 3,Pages: 175-180 (2010)
・Correlation between corrosion rate and AE signal in an acidic environment for mild steel, Corrosion Science, Volume 51, Issue 8, Pages 1679-1684 
・Statistical Analysis of Corrosion in the Bottom Floors of Oil Storage Tanks (Second Report) Report on the directed percolation simulation for corrosion in the bottom floors of oil storage tanks and its application, Journal of High Pressure Institute of Japan, Vol. 46 (2008), No. 4, pp.237-244 
・Evaluation of back-side flaws of the bottom plates of an oil-storage tank by the RFECT. NDT & E International, 2008. 41(7): pp. 525-529.
・Detection of fatigue damage accumulation and hydrogen embrittlement in 7075 alloy by the eddy current method, Journal of High Pressure Institute of Japan, 44(5),pp.10-16(2006)
・Residual Magnetic Flux Leakage Technique for Surface Flaws with the Magneto - Impedance Sensor and Wavelet Analysis, Journal of High Pressure Institute of Japan, 44(1),pp.47-54(2006)
・Influence of corrosion products on magnetic flux leakage signals in inspection of far-side metal-loss defects in oil storage tank bottom floors, Jpn. Petrol. Inst., 47 (1), pp.19-26 (2004)
・Non-destructive Evaluation Method for Far-side Corrosive Type Flaws in Oil Storage Tank Bottom Floors Using the Magnetic Flux Leakage Technique, J. Jpn. Petrol. Inst., 46(2), pp.126-132(2003)

You can find my research papers in following URL for nondestructive testing.





We previously proposed a statistical risk analysis method for accidents at industrial facilities
by using a risk curve to show the relationship between the cumulative frequencies and
the damage magnitude of the accidents on a log-log scale.