springback is one of the most common and important issues in metal forming area. due to it depends on variety of parameters, it is hard to predict. hence, in this paper, the effect of continuum damage mechanics (cdm) based on the lemaitre isotropic unified damage lawon springback was investigated. swift’s hardening law was employed to describe isotropic hardening behavior.the result showed cons...

With the gradual application of composite materials to ships and offshore structures, structural strength composites that can replace steel should be explored. In this study, mechanical bearing failure modes a composite-to-metal joining structure connected by mechanically fastened joints were experimentally analyzed. The effects fiber tensile stress concentration on static structures investigat...

Active transducer networks using distributed piezoelectric actuator/sensor were designed in terms of a concept of ‘Standard Sensor Unit’ (SSU). Functionally integrating the artificial neural networks well-trained by Damage Parameters Database (DPD) developed in Part I, an active online structural health monitoring (SHM) system was configured on a VXI platform, which was then validated by quanti...

We present a surface-mountable miniature Fabry-Perot (FP) pressure sensor that utilizes the total internal reflection at a 45 degrees angled fiber end face to steer the optical axis by 90 degrees . By using the fiber as a waveguide, as well as a natural mask in photolithography, an FP cavity is constructed on the sidewall of the fiber. A polymer-metal composite diaphragm is employed as the pres...

We present the case of a 45-year-old woman with recent onset of dipnea and atrial fibrillation. She was referred to our center for treatment of an associated ventricular septal defect. Echocardiography confirmed the presence of a membranous ventricular septal defect, but also showed signs of constriction. Cardiac computed tomography displayed a severe, diffuse calcified pericarditis. We show th...

For direct detection of faint exoplanets, high-contrast imagers would be indispensable for strongly suppressing central bright stars. In particular, extremely high contrast of 10−10 will be needed for detecting Earth-like planets. An eight-octant phase-mask (EOPM) coronagraph is one of promising concepts because of its high-contrast performance, small inner working angle, and simple optical con...

Surfaces containing reactive ester polymer brushes were functionalized with cyclopropenone-masked dibenzocyclooctynes for the light activated immobilization of azides using catalyst-free click chemistry. The photodecarbonylation reaction in the amorphous brush layer is first order for the first 45 s with a rate constant of 0.022 s(-1). The catalyst-free cycloaddition of surface bound dibeznocyc...

We report a new technique for building a wide-angle, lightweight, thin-form-factor, cost-effective, easy-to-manufacture near-eye head-mounted display (HMD) for virtual reality applications. Our approach adopts an aperture mask containing an array of pinholes and a screen as a source of imagery. We demonstrate proof-of-concept HMD prototypes with a binocular field of view (FOV) of 70°×45°, or to...

We investigated how operating system design should be adapted for multithreaded chip multiprocessors (CMT) – a new generation of processors that exploit thread-level parallelism to mask the memory latency in modern workloads. We determined that the L2 cache is a critical shared resource on CMT and that an insufficient amount of L2 cache can undermine the ability to hide memory latency on these ...

The damage mechanisms of biaxial non-crimp-fabric (NCF) reinforced composites with a quasi-isotropic [(45/-45)(90/0)]4s layup subject to low-velocity impact (LVI) and compression-after-impact (CAI) loadings are investigated. Experimental results indicate that fibre compressive failure in the 0° plies controls peak load during CAI, which is influenced by out-of-plane transverse deformation impac...