A5074937408- Welding Techniques and Residual Stresses
- Advanced Fiber Optic Sensors
- Additive Manufacturing Materials and Processes
- Laser Material Processing Techniques
- Advanced Welding Techniques Analysis
- Advanced machining processes and optimization
- Advanced Machining and Optimization Techniques
- Concrete Corrosion and Durability
- Smart Materials for Construction
- Photonic and Optical Devices
- Geophysics and Sensor Technology
- Structural Health Monitoring Techniques
- Ocular and Laser Science Research
- Laser and Thermal Forming Techniques
- Analytical Chemistry and Sensors
- Non-Destructive Testing Techniques
- Manufacturing Process and Optimization
- Machine Fault Diagnosis Techniques
- Infrastructure Maintenance and Monitoring
- Microstructure and Mechanical Properties of Steels
- Geotechnical Engineering and Underground Structures
Dalian University of Technology
2021-2024
Welding Science (Brazil)
2023
To investigate the long-term performance of packaged fiber Bragg grating (FBG) sensors embedded in civil infrastructure for strain monitoring, this paper, influence host matrix's creep effect on behavior FBG was systematically studied through theoretical, numerical, and experimental analysis. A theoretical transfer analysis between optic fiber, packaging layer, matrix to consider performed accordingly monitoring. Parametric studies were carried out using numerical with glass reinforced...
From the viewpoint of BDS bridge displacement monitoring, which is easily affected by background noise and calculation a fixed threshold value in wavelet filtering algorithm, often related to data length. In this paper, processing method Complete Ensemble Empirical Mode Decomposition with Adaptive Noise (CEEMDAN), combined adaptive de-noising proposed. The composed mean variance coefficients each layer used de-noise monitoring data. CEEMDAN was decompose response obtain intrinsic mode...
As the main load bearing component, steel strand has a significant impact on safety of civil infrastructure. Real-time monitoring stress distribution throughout damage process is an important aspect infrastructure health assessment. Hence, this study proposes optical-electrical co-sensing (OECS) smart with DOFS and CCFPI embedded in. It can simultaneously measure small strains in initial phase high accuracy obtain information large deformation relatively low precision. Several experiments...
Carbon-fiber-reinforced polymer (CFRP) is a type of composite material with many superior performances, such as high tensile strength, light weight, corrosion resistance, good fatigue, and creep performance. As result, CFRP cables have great potential to replace steel in prestressed concrete structures. However, the technology monitor stress state real-time throughout entire life cycle very important application cables. Therefore, an optical-electrical co-sensing cable (OECSCFRP cable) was...
Carbon fiber reinforced polymer (CFRP) can be applied for bridge cables due to its excellent properties. As the important load-bearing structural component, real-time force monitoring of CFRP cable is required. This paper presents a new smart that combines self-sensing rods with embedded sensors and anchorage system using extrusion technology. By embedding optical (OF) coaxial Fabry-Perot interferometer (CCFPI) into respectively, two types (CFRP-OF rod CFRP-CCFPI rod) were fabricated. A unit...
The flow characteristics of keyhole and molten pool impact the real-time process stability seam formation severely in all-position low-power laser MAG hybrid (LP-LMH) welding. To probe into pool's dynamics at various spatial welding positions, high-speed camera images metal transfer were sensed. Meanwhile, a novel model was developed, functions position gravity on investigated. results proved that as increases, location where droplet striking changes accordingly, further disturbing keyhole's...
To address the problem of mutual constraints between heat input and efficiency in arc additive manufacturing, a BCTW-GIA process is proposed. In this paper, components are manufactured using T-DW methods. The macroscopic morphology, cooling process, microstructure properties analysed. According to results, method achieves deposition 15.46 kg/h, which 123% improvement compared method. addition main wire consumed some heat, resulting less being applied member, maximum average temperatures were...
Abstract Based on the dynamic behavior of laser keyhole, time characteristics coupling discharge heat source in pulsed induced double-TIG welding (LIDTW) are studied. The behaviors arc plasma and keyhole were directly observed by high-speed camera auxiliary illumination source. physical analyzed spectrometer quality analyzer. A model is established to reveal regulation mechanism discharge. It found that after pulse action between double-arc does not end immediately, its depends existence...
In order to study the influence of transverse offset distance between laser and arc (TODLA) on discharge characteristics hybrid heat source coupling flow molten pool, dynamic behavior plasma, pool keyhole was monitored in real time, plasma spectral information collected analyze its energy distribution characteristics. The results show that under different TODLA conditions, charged has two states: strong state separation state. When TODLA=2 mm, at center strongest intensity, lowest electron...
<title>Abstract</title> Based on the defects such as sidewall and interlayer unfusion in welding process of titanium alloy thick plate, it is proposed to transverse offset between laser arc change discharge position energy distribution, which provides a theoretical basis for solving plate. In this study, effect distance (TODLA) characteristics hybrid heat source coupling flow molten pool was studied by using method plate surfacing. The dynamic behavior plasma, keyhole monitored real time,...