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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 16 of 16 for “"Material fracture"”.
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Material Point Methods For Simulating Material Fracture
Material fracture surrounds us every day from tearing off a piece of fresh bread to dropping a glass on the floor. Modeling this complex physical process has a near limitless breadth of applications in everything from computer graphics and VFX to virtual surgery and geomechanical modeling. Despite …
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Structural behavior of fiber reinforced mortar related to material fracture resistance
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1989.
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Modelagem de fratura dúctil em colisão de embarcações utilizando modelo de dano de Lemaitre modificado
… methodologies, and to simulate numerically the material’s ductile fracture, several failure criteria have been applied. With this perspective, thi3s article considers a new approach for the application of numerical analysis to ship collision and stranding, based on the Continuum Damage Mechanics …
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Potential-Based Fracture Mechanics Using Cohesive Zone and Virtual Internal Bond Modeling
… of nonlinear constitutive relationships along fracture surfaces is a fundamental issue in mixed-mode cohesive fracture simulations. A generalized potential-based constitutive theory of mixed-mode fracture is proposed in conjunction with physical quantities such as fracture energy, cohesive …
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Investigation of rapid freeze prototyping and investment casting with ice patterns
… on curing kinetics of the slurries and the fracture toughness of mold materials. The curing kinetics of the slurries and mold material fracture toughness from different compositions are examined and the effects of various processing parameters on the results are examined and …
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Fracture of Hot-Pressed Silicon Nitride at Elevated Temperatures
… hot-pressed silicon nitrides were fractured between 1100(DEGREES)C and 1350(DEGREES)C in four point bend at three displacement rates. Fracture stress and critical stress intensity factor were calculated and plotted versus temperature for each displacement rate. The scanning electron …
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Stent Reliability and Maintenance: Integrating Probabilistic and Physics-of-Failure Models
… of stents are investigated and analyzed based on fracture mechanics study in biomaterial and medical fields. We then propose a probabilistic modeling framework to study reliability and maintenance strategies for stent deployment and operation through two dominating failure processes: delayed …
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Materials At Extremes: Shock-induced Fracture and Phase Transitions
… science, aerospace engineering, chemistry, and materials science. Most broadly, the study of shock wave can be broken into two categories; the destructive and the constructive. On the destructive side, researchers are investigating the deleterious effects of shock waves in primary traumatic …
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Fracture-Based Method to Determine the Flexural Load Capacity of Concrete Slabs
… service demands and limited availability of raw materials for rigid pavements pose a unique challenge in terms of the initial pavement design, concrete material selection, and the slab's cracking performance throughout its service life. New pavement technologies and concrete materials continue to …
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Materials characterization and structural design of ceramic micro turbomachinery
… includes the effect of length scale on materials and structural response, material characterization, structural analysis and failure probability, and heat transfer analysis. Due to the differences in length scales between the microengine and conventional macroscale turbomachinery, a …
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Junctions and Strands: Breaking Property Tradeoffs in Polymer Networks and Composite Polymer Electrolytes
… the mechanics of polymer networks, specifically material toughness and the nature of material fracture. Polymer networks, which include tire rubber, windmill turbine blades, tissue engineering scaffolds, polymer electrolytes (vide infra) and many other materials, possess a useful lifetime …
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Wave management in 1D and 2D granular systems: designs for stress wave mitigation and control
… beyond merely dissipating their energy through material fracture, fragmentation, yielding etc., has been a significant focus of research in recent years. Materials exhibiting stress wave control characteristics would enable novel applications, such as for example stress wave focusing, …
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Three-dimensional modeling of failure in quasi-brittle materials and structures
… and failure due to the presence of a nonlinear fracture process zone ahead of the crack front. Predictive models and design methodologies have to be able to reliably calculate the load capacity, or structural strength, of structures while taking into account the nonlinearity of the material …
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Fracture characterization of thin bonded asphalt concrete overlay systems
… benefits. Conventional asphalt concrete fracture tests were developed for pavements with homogeneous asphalt concrete mixtures, and typically their thicknesses exceed two inches. The use of spray paver technology for construction of TBO leads to continuously varying asphalt binder …
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The effect of geometry on acoustic emission.
… the acoustic emission sources in terms of material fatigue and fracture parameters in order to determine their severity on the structure components. In practice, the acoustic emission signature from the receiving transducer output is strongly affected by the structure geometry, …
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Seismic precursor identification method integrating acoustic emission physical models and multi-source data
… time. Earthquakes result from macroscopic rock fracture in the Earth's crust, and their preparation process shares profound physical homology with the cross-scale damage evolution in materials, from microcrack initiation and propagation to macroscopic instability. Acoustic emission (AE), as …