Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 5 of 5 for “"lifetime prediction model"”.
-
In situ power-loss estimation of IGBT modules
A fault detection and prediction method for insulated-gate bipolar transistors (IGBTs) has been improved over the past decades to reduce system downtime. In situ lifetime estimation of IGBT modules has been challenging due to a number of requirements: the necessity to operate at high voltage in the …
-
Effects of metallurgical chemistry and service conditions on the oxidation limited life time of FeCrAl-based components
… In the present work a number of commercial and model alloys have been studied with respect to the lifetime oxidation behaviour. The experimentally determined lifetimes were compared with those calculated based on the available lifetime prediction model. Analytical studies were performed on …
-
Fatigue life modelling of anisotropic styrenic block copolymers for a prosthetic heart valve application
This thesis describes a fatigue lifetime prediction model for anisotropic styrenic block copolymers. A shortlist of cylinder forming block copolymers has been tested for a flexible leaflet aortic prosthetic heart valve, designed to mimic the native structure of the aortic leaflet. Polymeric valves …
-
Nondestructive Evaluation of Engine Run Turbine Blades Using Laser Ablation and Photoluminesence Stress Measurements
… of TBCs and the eventual use of remaining lifetime models on individual components would save potentially functional parts from being removed from use before necessary. Using thermally sprayed sample coupons and simulated thermal loading in elevator furnaces, non-destructive evaluation …
-
Analysis and Modeling of the Mechanical Durability of Proton Exchange Membranes Using Pressure-Loaded Blister Tests
… are then used to validate the constitutive model and methods of the finite element analysis (FEA). With confidence in the FEA, stress histories of constant pressure tests are used to develop linear damage accumulation and residual strength based lifetime prediction models. Robust models, …