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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 20 of 42 for “"Fracture mechanisms"”.
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Fracture mechanisms of synthetic fiber ropes
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1984.
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Fracture mechanisms in PVC and other thermoplastics
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1984.
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Tensile Fracture Mechanisms of Ferritic/martensitic Structural Materials
X-ray measurements and analysis not only support the hypothesis of the association between critical stress and critical interfacial strength, but also offer a new method to determine the true strain/stress behavior during deformation. This method is called the Universal Micro-structural …
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Toughening and fracture mechanisms of rubber modified polyamides
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1995.
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Fracture Mechanisms of Concrete Under Static, Sustained, and Repeated Compressive Loads
Made available in DSpace on 2014-12-10T22:21:43Z (GMT). No. of bitstreams: 1 7212137.pdf: 7017329 bytes, checksum: a66bb32306c2ad50e4147ec5d5d5eb7f (MD5) Previous issue date: 1971
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Effects of Carbon on Fracture Mechanisms in Nanocrystalline BCC Iron - Atomistic Simulations
… defects. The effects of intergranular carbon on fracture toughness and the mechanisms of fracture were investigated. It was found that as the average grain size changes the dominant energy release mechanism also changes. Because of this the role of the intergranular carbon changes and these …
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In situ TEM investigation of deformation and fracture mechanisms of ceramics and alloys
Limited Restriction Lifted for Item 103359 on 2019-09-30T09:15:20Z.
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Multi-paradigm modeling of mode I&II dynamic fracture mechanisms in single crystal silicon
… and similar technologies. The understanding of fracture of silicon is crucial for the engineering process and the development of robust devices. However, the mechanisms of fracture in silicon are complex and are still not fully understood. Several experimental studies of fracture have been …
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Modeling of nano-scale fracture mechanisms in a graphene sheet using the atomistic j-integral
… penalty and improve their strain to failure and fracture toughness. This thesis aims at studying these length scale effects in nano-fillers, identifying the existence of a lower bound on flaw-size that marks the transition from brittle fracture to strength-based failure in nanocomposites, …
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The Effects of Temperature on Fracture Behavior and Fracture Mechanisms of Copper Alloys for High Heat flux Applications
Made available in DSpace on 2017-07-06T18:55:08Z (GMT). No. of bitstreams: 3 Li_Meimei_MS.pdf: 41567594 bytes, checksum: dce44a7ecbfc865b1e4d3aea199d02ad (MD5) Li_Meimei_MS_ABS.pdf: 1028268 bytes, checksum: 3958467b416638279ef210f1b6cb352b (MD5) license.txt: 4813 bytes, checksum: …
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Tensile Mechanics of the Knee Meniscus in the Context of Cracks: Failure and Fracture Mechanisms, Strain Concentrations, and the Effect of Specimen Shape
… tension, with specific attention to failure mechanisms (fracture and bulk rupture) and local strain concentrations. A finite element model was used to find a test configuration likely to cause fracture and crack propagation. Center cracks with a 45° crack–fiber angle were selected for …
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Investigation of Toughening Mechanisms in the Fracture of Asphalt Concrete Using the Clustered Discrete Element Method
… of solid inclusions and a viscous matrix. The fracture of heterogeneous solids is a difficult problem to handle numerically due to the creation and continuous motion of new surfaces. A clustered discrete element method (DEM) is employed as a means to investigate fracture mechanisms in asphalt …
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Damage accumulation of bovine bone under variable amplitude loads.
Stress fractures, a painful injury, are caused by excessive fatigue in bone. This study into damage accumulation in bone sought to determine if the Palmgren-Miner rule (PMR), a well-known linear damage accumulation hypothesis, is predictive of fatigue failure in bone. An electromagnetic shaker …
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A Multiscale Method for Simulating Fracture in Polycrystalline Metals
… particularly in simulating fundamental atomic mechanisms involved in the initiation and evolution of damage. Simulating fundamental material processes using first principles in physics strongly motivates the formulation of computational multiscale methods to link macroscopic failure to the …
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Fatigue-fracture relation on asphalt concrete mixtures
… potential relationships between fatigue and fracture parameters obtained from standardized laboratory tests. A flexural bending beam test was used to obtain two fatigue parameters, which include a traditional fatigue criterion based on stress or strain to find number of cycles to failure and …
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Quantitative and consistent tests for interlayer adhesion in laminated glass
… of samples: low and high adhesion. Stress and fracture analysis was conducted using the finite element method. The numerical analysis was first validated against simple strength of materials analyses and the measured load deflection response. The numerical analysis then provided the variation …
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The influence of microporosity on the mechanical properties of bulk, scaffold, and composite scaffold biphasic calcium phosphate
… testing. The compressive mechanical strength and fracture mechanisms of monolithic BCP and composite BCP/PMMA scaffolds with varying micropore size and fraction were characterized. The Young‘s modulus of the resonant frequency samples showed an exponential dependence on micropore fraction and a …
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High velocity impact fracture
An in-depth understanding of dynamic ductile fracture is one of the most important steps to improve the survivability of critical structures such as the lost Twin Towers. In the present thesis, the macroscopic fracture modes and the fracture mechanisms of ductile structural components under high …
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Assessing coupled mechanical behavior and environmental degradation at submicron scales
… electromechanical properties, deformation and fracture mechanisms, and environmental resistance of materials at submicron scales have been investigated through the combination of nanomechanical testing, high resolution microscopy, diffraction, and electrochemical testing. Nanomechanical …
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Mechanics of Notched Izod impact testing of polycarbonate
… has been done using Izod testing to compare the fracture energies of blends of Polycarbonate and rubbery materials; however the specific yielding and fracture mechanisms associated with each blend are rarely analyzed. This study presents detailed images, fracture energies, and time durations of …
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