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Fiber Reinforcement Compaction In Resin Injection Pultrusion Process, Neerad Shakya
Fiber Reinforcement Compaction In Resin Injection Pultrusion Process, Neerad Shakya
Electronic Theses and Dissertations
Resin injection pultrusion is a cost-effective continuous manufacturing process to produce composites of constant cross-section. In this process, fiber reinforcements are continuously pulled through the injection chamber where liquid resin is injected to cause complete wetout of the fibers before exit. The fiber-resin combination obtained from the injection chamber is then cured to obtain the desired pultruded composite. There are various processing and geometric parameters affecting the wetout process. The main objective of this study is to present a numerical model to simulate the resin flow through the fiber reinforcement when compaction of the fibers is also taken into account. …
Enhanced Pvdf Film For Multi Energy Harvesting, Ranmunige Nadeeka Karunarathna
Enhanced Pvdf Film For Multi Energy Harvesting, Ranmunige Nadeeka Karunarathna
Electronic Theses and Dissertations
No abstract provided.
Micro-Mechanics Based Representative Volume Element Modeling Of Heterogeneous Cementitious Materials, Mohammadmehdi Shahzamanian Sichani
Micro-Mechanics Based Representative Volume Element Modeling Of Heterogeneous Cementitious Materials, Mohammadmehdi Shahzamanian Sichani
Electronic Theses and Dissertations
The current work focuses on evaluation of the effective elastic properties of cementitious materials through a voxel based FEA approach. Voxels are generated for a heterogeneous cementitious material (Type-I cement) consisting of typical volume fractions of various constituent phases from digital microstructures. The microstructure is modeled as a micro-scale representative volume element (RVE) in ABAQUS to generate cubes several tens of microns in dimension and subjected to various prescribed deformation modes to generate the effective elastic tensor of the material. The RVE-calculated elastic properties such as moduli and Poisson's ratio are validated through an asymptotic expansion homogenization (AEH) and compared …