Evaluation of Fatigue Properties of Steel Bar by Smart Stress-memory Patch
スポンサーリンク
概要
- 論文の詳細を見る
A fatigue sensor called “smart stress-memory patch” has been presented to evaluate the fatigue damage of infrastructures as bridges and ship. In this study, the smart stress-memory patch was applied to the steel bar to estimate the stress amplitude and the cyclic number. Firstly, the fatigue test of the steel bar with attached sensor was carried out and the fatigue crack growth behavior of the sensor was investigated. Secondly, the stress distribution of the sensor was calculated by using the finite element method to evaluate a complex strain transfer from the steel bar. Finally, the possibility of measurement for the stress amplitude and the cyclic number by using smart patch was evaluated. The fatigue crack growth rate of the attached sensor was decreasing with the crack growth. Especially when the stress amplitude was large, the crack growth rate decreased dramatically with the crack growth. The analysis of stress distribution shows that the size of plastic zone around crack tip decreases with the crack length and the load subjected to the sensor is similar to that of the uniform displacement testing. In addition, the modified stress intensity factor based on the uniform displacement testing is proposed to correct the shape effect of the attached sensor on crack growth behavior. Appling the modified stress intensity factor to the principle of smart patch, it was demonstrated that the stress amplitude and the cyclic number of the steel bar could be estimated from the crack lengths of two sensors.
- 社団法人 日本鉄鋼協会の論文
- 2011-02-15
著者
-
Shiraiwa Takayuki
Department of Materials Engineering, The University of Tokyo
-
Shiraiwa Takayuki
Department Of Civil Engineering Kitami Institute Of Technology
-
Enoki Manabu
Department Of Engineering The University Of Tokyo
-
Shiraiwa Takayuki
Department Of Materials Engineering The University Of Tokyo
関連論文
- Evaluation of Fatigue Properties of Steel Bar by Smart Stress-memory Patch
- Fatigue Process Evaluation of Ultrasonic Fatigue Testing in High Strength Steel Analyzed by Acoustic Emission and Non-Linear Ultrasonic
- SCC Monitoring of Chloride Droplets on Thin SUS304 Plate Specimens by Analysis of Continuous Recorded AE Waveform
- Acquisition and Analysis of Continuous Acoustic Emission Waveform for Classification of Damage Sources in Ceramic Fiber Mat
- Evaluation of Thermal Deformation Process of Nickel Based Active Composites by Laser AE Technique
- Crack Monitoring during Plasma Spraying of Ceramic Coatings by Non-Contact Acoustic Emission Method
- Deformation and Anelastic Recovery of Pure Magnesium and AZ31B Alloy Investigated by AE
- Recovery Behaviour of Pure Magnesium in Cyclic Compression-Quick Unloading-Recovery Process at Room Temperature Investigated by AE
- Evaluation of the Twinning Behavior of Polycrystalline Magnesium at Room Temperature by Acoustic Emission
- Classfication of Microfracture Process Type in Glass Matrix Composites by Quantitative Acoustic Emission Method
- Evaluation of Microfracture Mode in Ceramic Coating during Thermal Cycle Test using Laser AE Technique
- Monitoring of Acoustic Emission Activity of Smart Stress Memory Patch to Estimate Maximum Fatigue Stress for Structural Health Monitoring
- Evaluation of Fatigue Properties of Steel Bar by Smart Stress-memory Patch
- Scattering in Fatigue Crack Growth of Thin Pure Copper Sheet for Smart Stress Memory Patch
- Smart Stress-Memory Patch for Fatigue Damage of Structure
- W03I Development of stress memory patch(International Workshop on "New Frontiers of Smart Materials and Structural Systems")
- Fatigue Crack Length Measurement of Sputtered Metal Film for RFID-based Smart Stress Memory Patch
- Detection of AE Events due to Cracks in TBC during Spraying Process
- Strain-Controlled Fatigue Behavior in Thin Pure Copper Sheet for Smart Stress-Memory Patch
- In-Situ Observation and Acoustic Emission Analysis for Corrosion Pitting of MgCl_2 Droplet in SUS304 Stainless Steel
- Finite Element Analysis of Tensile Fatigue Behavior of Coronary Stent
- Effects of Plating Conditions on Electroless Ni-Co-P Coating Prepared from Lactate-Citrate-Ammonia Solution