Process planning for laser peen forming of complex geometry: An analytical-based inverse study
Ph.D. student Jiang proposed an analytical-based process planning method for LPF of complex thin-walled structures and developed the analytical model between eigen-moment field and principal curvature field. Experimental results show high conformity between the deformed and objective surfaces, validating the proposed method. This work was recently published in THIN WALL STRUCT.
Laser-Induced Stress-Driven Nanoplate Jumping Visualized by Ultrafast Electron Microscopy
Ph.D. candidate Yu Zhou et al. conducted the time-resolved transmission electron microscopy observations and TTM-MD simulation to reveal a jumping regime of nanoplate driven by laser-excited stress without melting and sublimation. This study unveiled the jumping regime driven by impulsive laser-excited stress and offers understanding of light-matter interaction. This work was recently published in ACS NANO
Femtosecond laser-induced nanoparticle implantation into flexible substrate for sensitive and reusable microfluidics SERS detection
Prof. Hu and Ph.D. student Zhou proposed a novel process of femtosecond laser nanoparticle array (NPA) implantation to achieve homogeneous forward transfer of gold NPA on a flexible polymer film and integrated it within microfluidic chips for SERS detection. SERS substrates represent excellent reusability and sensitivity in continuous detection of redox reaction. This work was recently published in INT J EXTREME MANU
Alternate deposition and remelting microdroplets via single laser for printing low-defect and high-performance metal micropillars
Dr. Luo et al. proposed alternate deposition and remelting microdroplets to eliminate voids and delamination suffered by LIFT. The yield strength and elastic modulus of printed micropillars were measured to augment threefold, approaching 63% of the bulk metal. Laser remelting regime was elucidated, including the non-melting, remelting, and vaporizing regions. This work was recently published in INT J MACH TOOL MANU
Density-based topology optimization of multi-condition peening pattern for laser peen forming
Ph.D. student Jiang proposed a process planning method for LPF to determine multi-condition peening patterns by means of topology optimization, providing an effective approach for complex shaping of LPF and liberating the high flexibility of the process. Results indicate that multi-condition planning yields superior outcomes compared to using a consistent process condition. This work was recently published in INT J MECH SCI
