Performance and service life prediction is an integral part of mechanical engineering and design of any part subjected to repeated loading during use. The goal is to accurately predict service life (or remaining service life) and increase the reliability of part functionality. This allows a company to have a competitive edge over its rivals in terms of optimised material selection and design considerations. In addition to machine parts service life prediction is relevant to other cyclically loaded structures such as overhead conductors and their fixtures, cutting elements of blanking dies etc.
The goals of the research are:
1. development of the product-based methods for evaluating their service life by using traditional or novel material testing methods.
2. clarifying of product-based failure causes and mechanisms and relate them to material microstructure/properties, including effect of residual stresses and design aspects.
The research is carried out in cooperation with Laboratory of Mechanical testing and Metrology. On one hand experts in the field of mechanical testing and accredited laboratory, with calibrated testing machines, on the other can work in unisom.
Areas of expertise:
• failure analysis, causes and measures to avoid failure,
• product development (material, heat treatment, production technology etc.),
• optimisation parameters of industrial production lines, laboratory and industrial tests with component control,
• material strengthening technologies (surfacing and heat treatment).
Area of applications:
• sheet-metal cutting and fine blanking
• assessment of automotive parts,
• assessment of aeronautical parts,
• energy transfer (overhead line conductors and fastenings).
Test and analysis methods:
• fatigue testing of metallic and non-metallic (hardmetals and ceramic) materials and coatings, including low and high temperatures,
• impact and fracture toughness testing, including low and high temperatures
• failure analysis and fractography (microstructure, composition, SEM, XRD and etc),
• quantitative and qualitative analysis methods,
• vibration testing.
Fig. 1 Fatigue testing of overhead conductor.
Head of reasearch:
Mart Saarna, Priidu Peetsalu