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Local Damage Analysis Of Fiber -Reinforced Polymer Matrix Composites, Arsenio Domingo Caceres
Local Damage Analysis Of Fiber -Reinforced Polymer Matrix Composites, Arsenio Domingo Caceres
Graduate Theses, Dissertations, and Problem Reports
While it is widely recognized that failure occurs as a result of damage accumulation, characterization of composite material behavior is currently limited to obtaining the elastic properties and the strength values. With such information, it is not possible to assess the remaining life of a structural component or to estimate the likelihood of failure as a function of the time in service. The present investigation concerns the development of a continuum damage mechanics (CDM) formulation for polymer-matrix composites assuming the damage accumulates in the matrix, fiber, and fiber-matrix interphase regions. A local approach was taken by dividing the analysis of …
Computational Models Of Particle Size Effects On Brittle Oxide Scale Erosion, Ravi S. Tangirala
Computational Models Of Particle Size Effects On Brittle Oxide Scale Erosion, Ravi S. Tangirala
Graduate Theses, Dissertations, and Problem Reports
Metals and alloys designed for machines at elevated temperatures have microstructures and chemistries optimized to provide strength and resistance to oxidation. The majority of the commercial high temperatures metal or alloys intended to use at temperatures below 850°C or so rely on the formation of a continuous surface layer of essentially oxide scale for further oxidation resistance. Erosion of these machine parts by the small solid particle entrained in the liquid or gaseous working environment is a serious problem in many industrial applications. Numerous experiments have been conducted to obtain empirical relations for predicting material loss during erosion and to …
Computational Modeling Of Brittle Impact Erosion Mechanisms, Shanmuga Sundaram Balasubramaniyam
Computational Modeling Of Brittle Impact Erosion Mechanisms, Shanmuga Sundaram Balasubramaniyam
Graduate Theses, Dissertations, and Problem Reports
Materials are subjected to an erosion-corrosion environment in a wide range of applications today. Elevated temperatures promote the formation of oxide layers in jet engines. In fluidized bed boilers, the bed materials and piping of slurries and caustic materials cause erosion and corrosion. The process of erosion-corrosion may result in material loss and damage. Proper analytical modeling of the erosion-corrosion processes validated by experiments is needed to estimate the extent of damage in the material.;Empirical relations are available in the literature for predicting the amount of material loss due to erosion. These are obtained by conducting large number of experiments. …