Objective
In the ultrasonic travelling wave motor electrical signals generate high-frequency mechanical vibrations via piezo elements, the-high frequency vibration then being transformed into rotatory mechanical motion via contact and friction between elastic solids.
The motor is presently being intensively used in photo cameras. It may also have a high potential in automation, control and in the automotive industry. This requires intensive research concerning the wave propagation and contact phenomena as well as modelling the interaction of the piezo ceramic elements with the elastic parts. Such research is presently being carried out in several European countries sponsored by industry and by different national organisations, e.g. in Germany by the Deutsche Forschungsgemeinschaft. In the NIS extensive basic research in this field has been carried out.
This project will carry out an examination in depth of the applicability of classical Hertz theory to dynamic contact problems. Preliminary investigations have shown that there may be significant restrictions, especially when bodies in contact vibrate near their resonance frequencies. On the other hand, motion and energy transformation is most effective under resonance excitation. Therefore the project will make it possible to find solutions to several model problems concerning the frictional contact interaction between solids under near-resonance excitation. These problems are extremely complicated because they lead to non-linear boundary-value problems for partial differential equations with unknown separation of the adhesion and slip zones. In these zones the boundary conditions change from those expressing proportionality between normal and tangential stresses to kinematic conditions of adhesion together with well-known inequalities for stresses. Also, the velocities of the relative motion of the solids are unknown. They are to be determined simultaneously with the contact stress distributions from the rigid body equations of motion.
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
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Coordinator
64289 Darmstadt
Germany
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.