This paper presents the results of tensile tests for lead zirconate titanate (PZT)/Platinum (Pt) thin films of 2.15 lm thickness in atmospheric air at room temperature. An axial loading tester developed by the authors was used for the tests. The tester was equipped with a load cell with a maximum capacity of 0.5 N and a non-contact position measuring system based on the principle of capacitance micrometry. Furthermore, the tester was equipped with a CCD (chargecoupled device) system for measuring the displacement of the gage length. Specimens with three different widths (50, 100 and 150 lm) were fabricated to study the size (width of specimen) effects. The elastic moduli of the specimens with 50, 100 and 150 lm width were 72.8 € 3.7, 75.0 € 1.3, 73.3 € 1.8 GPa, respectively. In addition, the ultimate tensile strength of the specimens with 50, 100 and 150 lm width were 263.4 € 21.1, 238.6 € 4.5, 221.1 € 13.9 MPa, respectively. It was observed that the width of specimen has little effect on the elastic modulus of PZT/Pt thin films but has an effect on the ultimate tensile strength of PZT/Pt thin films and the ultimate tensile strength decreases as the width increases. It was assumed that the scatter in the ultimate tensile strength of 50 lm width was attributed to delamination of PZT/Pt layers before the fracture in the tensile test. The 0.2% offset yield strength could not be measured because the PZT/Pt thin film is very brittle.Keywords: Lead zirconate titanate thin film (PZT) / platinum (Pt) / micro tensile test / tensile strength / elastic modulus / thin film / Schlüsselwörter: dünne Blei-Zirkonat-Titanat (PZT) Schicht / Platin (Pt) / Mikrozugversuch / Zugfestigkeit / elastischer Modul / dünne Schicht /
In this paper, we propose a new approach to thermometer-to-binary encoder of Flash ADCs. Instead of integrating bubble error correction circuit as previous approaches, proposed approach integrates a bubble error detection circuit. The advantage of this approach is that it can handle all types of bubble error whereas previous approaches often deal with first-order bubble error only. Simulation results show that the bubble error detection circuit consumes very little energy.
: Ship are a box-shaped structure. It is used often fore and aft parts, bilge strake, deck with camber of ship structures. When this structure is compared with flat plate structure, it different to behaviour. Generally, if it subjected to axial compressive load, ultimate strength depend on the change of curvature. Also, In this paper, stiffened curved plate with 1/2+1+1/2 bay model subjected to compressive load carried out the elasto-plastic large deflection series analysis. and parameter effect considered slender ratio, web height/thickness as well as change of curvature and investigated collapse mode for analysis model.
In this paper, it performed to the elastic-plastic large deflection series analysis using the experimental model and predicted a failure mode and ultimate strength. The collapse mode of numerical analysis model is formed a plastic hinge on loaded flange and consistent with the collapse mode of experimental model. Also, The yield line is formed in the web could observed that have occurred the crippling collapse mode and the ultimate loads of the experimental model and numerical analysis model have maintained linearly Means 1.07, Standard deviation 0.04, Coefficient of variation(COV) 0.04 and the result of ultimate loads have appeared approximately 8% error rate. it was found that very satisfied to the experimental results and the applied rules. if it is considered to be maintain a reasonable safety level, it is possible to predict the failure modes of aluminium alloy plate girders and ultimate loads.
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