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.
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Showing 1 to 6 of 6 for “"Fracture Behaviors"”.
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Peridynamic Investigation of Stress-Strain Response and Fracture Behavior Variations in Micro-CT Images of Mock Energetic Nanocomposites
The stress-strain response and fracture behaviors of a mock energetic nanocomposite were investigated to reveal behaviors that contribute to variations throughout the sample. Approximately 100 XCT images that span the depth of a single sample were modeled in a peridynamics formulation to …
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Fracture of Asphalt Concrete: A Cohesive Zone Modeling Approach Considering Viscoelastic Effects
… that exhibits time and temperature dependent fracture behavior. Softening of the material can be associated to interlocking and sliding between aggregates, while the asphalt mastic displays cohesion and viscoelastic properties. To properly account for both progressive softening and …
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Microscale strain accumulation during fatigue and fracture of additively manufactured Ti-6Al-4V
… Ti-6Al-4V alloys to the observed fatigue and fracture behaviors. Additively manufactured Direct Metal Laser Melted (DMLM) Ti-6Al-4V samples with two different build orientations and build layer thicknesses were compared to conventionally manufactured annealed Ti-6Al-4V samples. Optical images …
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Application of the Variational Fracture Model to Hydraulic Fracturing in Poroelastic Media
… the use of simple numerical models to describe fracture geometry and propagation. Field tests provide evidence of interaction and merging of multiple fractures, complex fracture geometry and propagation paths. These complicated behaviors suggest that the simple models are incapable of serving as …
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Experimental evaluation of monotonic and cyclic fracture behavior using disk-shaped compact tension test and released energy approach
This thesis involves the evaluation of fracture behavior of asphalt concrete under monotonic and cyclic loading using the disk-shaped compact tension (DC(T)) test and a released-energy based approach. The standard DC(T) test was revised to facilitate both monotonic and cyclic loading tests, …
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Biomineralized Composites: Material Design Strategies at Building-Block and Composite Levels
… slips under low loads, and shifts to cleavage fracture under high loads. In comparison, the P. placenta composites, composed of micro-sized single-crystal laths and extensive intercrystalline organic interfaces, exhibit better crack resistance. In contrast, the single-crystal A. rigida prisms …