Abstract
The mathematical models of damageability under static and cyclic loadings are investigated. The parameters of damageability and endurance are considered necessary for the calculation of long-term durability wear and low-cycle and high-cycle fatigue, thermo-cyclic endurance and deformation as well as general models, taking into account multi-axis and multicomponent loads. The models of damageability at loading range, the probabilistic models of endurance and accumulation of damage at random influence are given. Probabilistic criteria for service life estimation and their connection with accumulated damageability are researched. Santrauka Darbe išanalizuoti pažeidimų matematiniai modeliai, kai veikia statinės ir ciklinės apkrovos. Išnagrinėti pažeidimų modelių parametrai bei ilgaamžiškumo savybės, reikalingos ilgalaikio stiprumo išnaudojimui, mažacikliam ir daugiacikliam nuovargiui, termocikliniam ilgaamžiškumui ir takumui įvertinti. Apibendrinti modeliai, įvertinantys daugiaašių ir daugiakomponenčių apkrovų ypatybes. Pateikti pažeidimų modeliai, esant apkrovų spektrui, tikimybiniai stiprumo ir pažeidimų kaupimo modeliai, esant atsitiktiniams poveikiams. Išanalizuoti resurso išnaudojimo kriterijai, parodytas jų ryšys su sukauptais pažeidimais.
Highlights
For the constructive elements with long periods of latent damage accumulation, it is expedient to evaluate operational condition on the basis of individual service life calculation depending on stressing during the operation period
In the process searching for rational constructive and engineering solutions, which allow an increase in the reliability of a specific component, is always the result of the analysis and the compromise between features of various aspects of stressing, a calculation of probability for possible types of destruction, its consequences, an engineering and economic ground of the appointed service life
Such an approach to service life calculation can be implemented by means of the rated-experimental methods providing comparison between parameters of operational loading of components with the experimental performances of their durability considering the influence of the main factors of actual loading processes
Summary
For the constructive elements with long periods of latent damage accumulation, it is expedient to evaluate operational condition on the basis of individual service life calculation depending on stressing during the operation period. In the process searching for rational constructive and engineering solutions, which allow an increase in the reliability of a specific component, is always the result of the analysis and the compromise between features of various aspects of stressing, a calculation of probability for possible types of destruction, its consequences, an engineering and economic ground of the appointed service life. Such an approach to service life calculation can be implemented by means of the rated-experimental methods providing comparison between parameters of operational loading of components with the experimental performances of their durability considering the influence of the main factors of actual loading processes
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
