...Jiaxi Xie; Kornel Ehmann; Jian Cao This work proposes a physically consistent numerical model to simulate ultrashort laser absorption by a metallic workpiece at the water–metal interface when optical breakdown of the dielectric occurs. The simulation couples the framework of the finite difference...

...Jingzhou Zhao; Xiaochun Li Thermal drawing from a preform recently emerges as a scalable manufacturing method for the high volume production of continuous metal microwires for numerous applications. However, no model can yet satisfactorily provide effective understanding of core diameter...

..., 2017; published online December 14, 2017. Assoc. Editor: Joey Mead. 21 05 2017 21 11 2017 Modeling Nanomanufacturing Production of graphene has become an important research topic after its first isolation in 2004. The single layer of graphene separated via micromechanical...

.... The dependence of the processing window on Cu layer thicknesses and laser exposure durations has also been investigated. A simplified model to estimate optimum laser sintering windows for Cu NPs using pulsed lasers is presented and the predicted estimates are compared against the experimental results. Given...

... of high duty ratio and applied frequency have been investigated on the corresponding width of the fabricated microslits and the experimental results have been represented graphically where the minimum width of the microslit is obtained as 44.85 μ m. Furthermore, mathematical modeling has been developed...

...; published online June 13, 2017. Assoc. Editor: Ulf Engel. 20 01 2017 17 05 2017 Modeling Nanomanufacturing Numerical simulations How water interacts with a surface is important for many physical, chemical, and biological applications. The wetting properties of water...

..., is an ideal tool for this processing technology. In this paper, an improved model for the prediction of ablation crater shape and fluence threshold in femtosecond laser processing of fused silica is presented, in which self-trapping excitons and electrons' relaxation are involved to depict ionization process...

... received November 28, 2016; published online January 10, 2017. Editor: Jian Cao. 24 11 2016 28 11 2016 Micro tool Miniaturization Modeling The original elliptical vibration texturing (EVT) process utilizes ultrasonic vibration of the cutting tool for fast generation...

... by an experimentally validated multiphysics model which also allows for estimation of the loss in yield and potential contact-related template damage because of the particle encounter. Also, finer inspection of template damage needs to be carried out over a much smaller area, thereby increasing throughput...

...Arvind Pattabhiraman; Deepak Marla; Shiv G. Kapoor A computational model to investigate the flushing of electric discharge machining (EDM) debris from the interelectrode gap during the spray-EDM process is developed. Spray-EDM differs from conventional EDM in that an atomized dielectric spray...

... characteristics, and material removal in micro-EDM via modeling and experimentation. Experiments have been carried out at four levels of electrical conductivity of saline water, i.e., 4 μ S/cm, 362 μ S/cm, 1106 μ S/cm, and 4116 μ S/cm, to study electrical breakdown of the dielectric and resulting craters...

... investigates the phenomenon of liquid dielectrophoresis (LDEP) using a localized nonuniform static electric field to deflect and control the jet's trajectory at the microscale for a water jet in air. A new analytical modeling approach has been attempted by representing the stable length of a water jet...

... of the microplastic part, the mold, and the actual process. Available simulation software is however actually made for macroscopic injection molding. By means of the correct implementation and careful modeling strategy though, it can also be applied to microplastic parts, as it is shown in the present work. Process...

... by a direct measurement may include voltage drop across the stray impedances in the circuit and may not accurately represent the exact voltage drop across micro-EDM plasma alone. Therefore, a model-based approach is presented in this paper to predict time-transient electrical characteristics of a micro-EDM...

... are modeled as a Gaussian process. Our approach seeks solutions using an iterative Newton–Raphson method for a fiber's linear and angular velocities such that the net forces and torques, including both hydrodynamic and Brownian effects, acting on the fiber are zero. In the Newton–Raphson method...

...; final manuscript received August 23, 2015; published online September 22, 2015. Assoc. Editor: Bin Wei. 26 06 2015 23 08 2015 Laser forming Modeling Nanomanufacturing Sintering Additive manufacturing, also called 3D printing (3DP), refers to a set of freeform...

... to enhance mechanical stability of these features when subjected to print force variation. This capability is gained through (1) the creation of a predictive model of the photolithographic process using matlab and (2) the verification of this model with the thick-film photoresistive polymers SPR 220 and AZ...

...Chi Xu; James Zhu; Shiv G. Kapoor The first step in model development is to decompose the cutting edge into a set of i circular sectors by discretizing the polar angle into differential segments d γ , as shown in Fig. 1 . For the present work, it is assumed that cutting is limited...

... surface finish, with the developed machine tool. The workpiece rotates at the angular velocity ω W in the actual cutting, as shown in Fig. 9( a ) . In the model, meanwhile, the workpiece does not rotate. Instead, the center of tool rotation O T rotates around the workpiece at the radius ε...

... interface. In this research, a shielding nozzle design is presented. A computational fluid dynamic model is developed to perform parameter analysis of the design. The numerical simulations were accomplished using the Eulerian approach to the continuous phase and a Lagrangian approach for droplet tracking...