Abstract The analyzed electrohydraulic servo valve is jet pipe type, is one of the mechatronics component used for precision flow control application. It consists of several precision and delicate components. For the analysis the jet pipe assembly of servovalve is identified and conducted a direct-solution steady-state dynamic analysis to study the response of the system for harmonic excitation...

We study a two-person game played on graphs based on the widely studied chip-firing game. Players Max and Min alternately place chips on the vertices of a graph. When a vertex accumulates as many chips as its degree, it fires, sending one chip to each neighbour; this may in turn cause other vertices to fire. The game ends when vertices continue firing forever. Min seeks to minimize the number o...

Damage from a dormant-season windstorm in a 3-year-old Populus research trial differed among four clones and three spacings and between monoclonal and polyclonal plots. Clonal differences in susceptibility to toppling (or leaning) were associated with both above-and below-ground characteristics. Susceptible clones had less taper in the lower stem and more weight in branches on the upper stem. T...

This paper presents some basic concepts of linear and non linear fracture mechanics, with particular attention to some aspects related to hard soils and rocks such as the behaviour of cracks in compression. A non-linear method is presented in particular, which allows to simulate the process zone at the crack tip as a cohesive crack, where shear resistance decays from the peak to the residual va...

The high-velocity impact resistance of hot-pressed zirconum diboride with 30 volume percent silicon carbide was studied using a combined experimental and computational approach. Test specimens in the form of 2 mm thick polished disks were impacted with -0.8 mm diameter tungsten carbide spheres at velocities up to 320 d s . The intrinsic flexure strength of the specimens was -1000 MPa. The flexu...