Within this contribution we present recently published findings [1] on the new way of utilizing polymeric materials for vibration damping. We present and demonstrate patented dissipative bulk and granular systems technology [2], based on which we have developed granular damping elements (GDE). The damping elements consist of granular viscoelastic material encapsulated and pressurized within a woven container made of basalt, carbon, and/or glass fibres. The hydrostatic pressure changes material properties and consequently the performance of the vibration isolation. Within this contribution, properties of three TPU materials in solid state are investigated, which after granulation are potential candidates for producing new GDE damping elements. We have demonstrated that for the case of TPU materials the stiffness and energy absorption capability of insulation may be increased between 10 to 100 times.
B.04 Guest lecture
COBISS.SI-ID: 16373019Members of the programme group organized 33rd Danubia Adria Symposium, which highlights the latest innovations, R&D and industrial activities in the area of experimental methods in mechanics. It also provides forum for discussion of the latest research results, new developments of concepts and technologies, proven techniques, as well as practical applications and standardization of the experimental methods in mechanics. Main topics on this simposium were: • Structural analysis: experimental tests, structural health monitoring, system identification, damage assessment, self-adaptive structures • Material characterization and testing: smart materials, residual stress, fatigue, fracture, creep • Practical applications and case studies • Biomechanics: biomaterials, biomechanics, medical and orthopedic devices, biofluid mechanics • Instrumentation: new sensors and actuators, advanced measurement systems, validation and reliability of instrumentation • Complex systems, integration of mathematical/numerical methods with experimental mechanics • Recent developments in international standardization and technical regulations • Mechanics of time-dependent materials • Polymer processing
B.01 Organiser of a scientific meeting
COBISS.SI-ID: 286319616The invention concerns a damping element (10, 108) for absorbing mechanical excitations comprising a container (14, 112, 114, 116) encapsulating a viscoelastic material, wherein the container (14, 112, 114, 116) is pressurized to a pressure level (p), at which said damping element's (10, 108) frequency (50) for absorbing a maximum energy (49), substantially matches a frequency of the mechanical excitation (56). The invention further relates to a method for producing a damping element (10, 108) as well as different uses.
F.32 International patent
COBISS.SI-ID: 12444187Odlični v znanosti is the annual project of the Slovenian Research Agency in the field of science promotion. In 2017, the achievement of the CEM research group was ranked among the most prominent achievements of Slovene researchers during the year. Researchers present a new generation of damping elements that surpass all existing technical solutions at least ten times and represent a technological breakthrough in the field of vibration damping, shock loads and noise. The patented achievement combines its own basic knowledge of the influence of pressure on the behavior of polymeric materials and on the process of forming a "field of contact forces" in granular materials. Patented damping elements represent a completely new and effective way of damping vibrations and noise. They consist of a knitted basalt tube filled with polymeric granular material under pressure. They can be used for anti-earthquake construction, protection of devices and machines, and protection of cars against shock loads in accidents.
E.01 National awards
The goal of the project was to optimize calendering and thermoforming processes for manufacturing plastic containers for the food industry through the knowledge and measurement of basic thermal and mechanical properties and to obtain the correlation of these properties with process conditions. The project also aims to create a link between the industrial partner (Panplast d.o.o.), the educational institution (UL FS and UL FKKT) and students with the common goal of spreading know-how from one side to the other and vice versa.
D.10 Educational activities
COBISS.SI-ID: 16372763