The hydrogen embrittlement (HE) behavior of a commercial QP980 steel is studied in this work. HE susceptibility results indicate that suffers from severe HE, and the fracture mode transforms ductile dimpling to brittle quasi-cleavage under attack hydrogen. EBSD show strain-induced martensite transformation can rarely occur at strain close strain, which mainly attributed high mechanical stabilit...

because of its kinetic nature and computational advantages, the lattice boltzmann method (lbm) has been well accepted as a useful tool to simulate micro-scale flows. the slip boundary model plays a crucial role in the accuracy of solutions for micro-channel flow simulations. the most used slip boundary condition is the maxwell slip model. the results of maxwell slip model are affected by the ac...

Natural fliers demonstrate a diverse array of flight capabilities, many of which are poorly understood. NASA has established a research project to explore and exploit flight technologies inspired by biological systems. One part of this project focuses on dynamic modeling and control of micro aerial vehicles that incorporate flexible wing structures inspired by natural fliers such as insects, hu...

The development of an automated bio-micromanipulation system provides high manipulation rates with optimal reproducibility and makes quantitative bio-micromanipulation possible. Visual-servo control is necessary for realizing automated bio-micromanipulation and increasing accuracy of micromanipulator. We have developed a dual-hand bio-micromanipulation system with micro-visual-servo control to ...

In micro-teleoperation, such as micro tele-surgery, a scaling problem is one of the most important problems. The human operator must be able to identify the micro-environment and execute well the microteleoperation. In this study, a human-centered scaling is suggested. In the developed micro-teleoperaion system, the human operator can choose the optimum scaling parameters in consideration of hi...