Microneedles have recently received much attention as a novel way for transdermal drug delivery. In this paper, numerical simulation of the insertion process microneedle into human skin is reported using finite element method. A multilayer model consisting stratum corneum, dermis and underlying hypodermis has been developed. The effective stress failure criterion coupled with deletion technique to predict complete process. results show good agreement experimental data deformation force....

With the continuous development of economy and society, production solid waste is increasing. Construction demolition (CDW), used tires silica fume are main components waste. Recycling these materials will reduce resource pressure, decrease carbon emissions protect environment, while bringing certain economic benefits. This study focused on influence synergistic effect recycled steel fibers (RSF) mechanical properties impact resistance aggregate concrete (RAC). The mathematical statistical...

The mouthparts of female mosquitoes have evolved to form a special proboscis, natural biomicroelectromechanical system (BMEMS), which is used for painlessly penetrating human skin and sucking blood. Scanning electron microscope observations show that the mosquito proboscis consists small bundle long, tapering, feeding stylets are collectively called fascicle, large scaly outer lower lip labium. During blood feeding, only fascicle penetrates into while labium buckles back remain on surface...

We show here that the mosquito cannot only give rise to a higher water-supporting force than water strider if ratio of body weight insect itself is compared, but also can safely take off or land on surface, and attach any solid surface like fly. found mosquito's legs are covered by numerous scales consisting uniform microscale longitudinal ridges (nanoscale thickness spacing between) nanoscale cross ribs between). Such special delicate microstructure and/or nanostructure leg contact angle...

This paper reports the development of a novel bio-inspired composite sandwich panel (BCSP) with fiber metal laminate (FML) face sheets and dual core to improve low-velocity impact behavior based on woodpecker's head layout as design template. The dynamic response BCSP under load is simulated analyzed by ABAQUS/Explicit software compared that (CSP) single foam core. affected these parameters, i.e., different sheet thickness, rubber thickness height, was also reported. results show has...

The laser power and scan speed are significant processing parameters influencing the defects microstructures due to affecting thermal state within melt pool during powder bed fusion (LPBF). To this end, these process parameter combinations under a constant energy density correlated with (balling phenomenon pores) (melt arrangement cell morphology). Setting combination (laser 200 W 910 mm/s, respectively) yields large balling droplets (average size of 150 μm) relatively high viscosity...

The utilization of sludge from sewage treatment plants, ground granulated blast furnace slag (GGBFS) and recycled fine aggregate (RFA) demolition abandoned buildings in the production geopolymer mortar (GRM) offers a sustainable solution to reduce Ordinary Portland cement (OPC) application, address growing volume municipal construction waste. This work aims investigate workability, mechanical performance microstructure GGBFS ash (SSA) based alkali activated GRM. SSA was used replace 100% OPC...

The utilization of recycled coarse aggregate (RCA) from construction and demolition waste (CDW) is a sustainable solution to protect the fragile natural environment save diminishing resources. current study was aimed at exploring impact resistance mechanical properties concrete (RAC) affected by hooked-end steel fiber (HF) crimped (CF). Fifteen mixtures considering different RCA substitution ratio, dosage, shapes were designed. Meanwhile, statistical analysis method-based Weibull...

In order to reduce the manufacturing cost of foamed ceramics and expand application scope industrial solid waste, in this study, a new type environment-friendly was prepared using direct high-temperature foaming with waste silicomanganese slag (SMS) fly ash (FA) as raw materials silicon carbide (SiC) agent. The influence SMS content, SiC sintering temperature on characteristics microstructure specimen were explored. More concretely, compressive strength, pore morphology, bulk density,...

Mosquitoes possess a remarkable ability to stand effortlessly and walk freely on water surfaces because their six legs provide large force support the body weight. This study is focused role of tarsus (the distal segment mosquito leg) it was observed that normally only tarsi make contact with water. The maximum value supporting (6 mm long) in estimated as 492 ± 5 μN, nearly 20 times weight mosquito, whereas for whole leg (11 mm) about 23 We demonstrate huge provided by originates from its...

In order to study the basic mechanical properties of basalt fiber reinforced recycled aggregate concrete, concrete mix ratio, length and volume mixing ratio chopped yarn are designed for changing factors. A total 324 specimens have been completed this investigation. The compressive strength, splitting tensile elastic modulus axial strength carried on experimental theoretical analysis as 81 specimens, respectively. all coarse were replaced by with a replacement rate 100%. Experimental results...