Inverse estimation of heat input in laser surface hardening with a dual-phase-lag model
Source abstract
Abstract
This study deals with the application of the conjugate gradient method for estimating the unknown time-dependent heat input in laser surface hardening based on the dual-phase-lag model. Subsequently, inverse variations of temperature at the heated surface can be obtained. Simulated experimental data, needed for the inverse analysis, are generated by adding random errors to the calculated exact temperatures for the boundary and interior of the medium. Two examples are considered to illustrate the accuracy of the proposed method. The influence of the measurement error and the measurement location upon precision of the estimated results is also investigated. Results show that an excellent estimation on the time-dependent laser heat input can be obtained with any arbitrary initial guess for the test cases considered in this study.
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Research context
OpenAlex topics: Laser and Thermal Forming Techniques · Thermography and Photoacoustic Techniques · Advanced Measurement and Metrology Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Clean Energy Center, Department of Mechanical Engineering, Kun Shan University 1 , No. 195, Kun-Da Rd., Yung-Kang Dist., Tainan 710-03, Taiwan
Department of Aeronautics and Astronautics, National Cheng Kung University 2 , No. 1, University Rd., Tainan 701, Taiwan
Funding
Ministry of Science and Technology, Taiwan, Republic of China
References (19)
Show source-provided references
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