clay soils and their related abnormal behavior such as excessive shrinkage, swelling, consolidation settlement and cracking on drying has been the subject of many investigations. previous studies mainly evaluated the effects of additives such as lime, cement and sand on these characteristics. initial results indicated that the soil characteristics were improved. however, reportedly in many case...

a series of tests and also numerical analyses were conducted to explore the mechanical behavior of a mixture of coarse gravelsize particles floating in a matrix of silt, sand or clay. the research is a step forward in an ongoing investigation on behavior of composite clay, which is used as the core material of some large embankment dams all over the world. after providing the reader with an ove...

Control of dynamical systems gets considerably harder with an increasing number of control variables. Especially when the control variables are restricted to integer values, the solution is of combinatorial complexity. An example of such systems are Digital Hydraulic Drives, where several cylinders contribute to the output torque independently. In this work we present an optimal control approac...

Engineering education in fluidics means to convey the physical principles behind pneumatic or hydraulic building blocks such as valves or cylinders. Up to now fluidic hardware plays an important role in this connection: Education laboratories with semi-professional components are used to build up small circuits and to perform experiments respecting hydraulic and pneumatic laws of nature. Based ...

Modelling and experimental identification of a hydraulic servoactuator system is presented. The development of the model i s important for further understanding the system and for developing a robust force controller. System parameters are identified using the elbow joint of the SARCOS slave experimental hydraulic manipulator. Experimental work is central to achieving the modelling objectives. ...

This paper presents an investigation of the hydro elastic behavior of vibrating blades in hydraulic machines, which is of strong interest for turbo machinery applications. As a representative case study for vibrating blade in hydraulic machines, a NACA 0009 oscillating hydrofoil is considered. The aim is to model the hydrodynamic moment acting on the oscillating hydrofoil. Two types of oscillat...