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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 134 for “"Tearing"”.
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Inertial tearing modes in magnetically-confined plasmas
… behavior of the plasma instability known as the tearing mode in parameter regimes relevant to magnetically-confined fusion plasmas. This included a derivation of the relevant equations and a method of solving them using Fourier analysis. This method allowed the derivation of several analytic …
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Quasi-static tearing tests of metal plating
Thesis (S.M. in Naval Architecture and Marine Engineering)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2002.
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Tearing down classroom walls to address nature-deficit disorder
International research shows that children who spend significant time in nature perform better academically, have a longer attention span, interact easily with others and are generally healthier (Coyle, 2010). This dissertation investigated the advantages of outdoor learning and play, and its …
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Tearing a cleft in the continuous surface of reality
My thesis investigates representation and manipulation of spatial conditions intrinsically linked to the visual perception of materials and surfaces. Trying to develop architecture from visual relationships between materials, light, and the eye has required that I circumvent the objective view …
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Tearing the envelope: from tunnel to tower industrial typology
… in spatial boundaries. With the interest of 'tearing' the factory building envelope for integration, the urban investigation seeks to establish ways of inhabiting and crossing these architectural and urban boundaries to foster connection.
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Hot tearing and constitutive behaviour of semi-solid aluminum alloys
The occurrence of hot tearing during solidification is one of the major factors influencing both the quality and productivity of aluminum castings. In order to reduce the formation of hot tears, quantitative information regarding both hot tearing formation and semi-solid deformation is essential. …
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Efficient direct-method parallel circuit simulation using multilevel node tearing
… The parallelism in the LU factorization without tearing has been found to be small and one level node tearing could have a large border size if it is forced to partition the circuit into a fixed number of subcircuits. In this thesis we increase the parallelism by using a multilevel node tearing …
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Deformation and tearing of uniformly blast-loaded quadrangular stiffened plates
An investigation into the deformation and tearing of stiffened quadrangular plates subjected to a uniform blast load is presented. A series of experimental results and numerical modelling using the finite element package; ABAQUS, on built-in quadrangular mild steel plates of different stiffener …
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A study of diverging concertina tearing of ductile metal plates
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1994.
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Tearing-mode transport model in the reversed field pinch concept
… originated by plasma electrical resistivity (tearing-, or resistive interchange, modes). The ultimate goal is to provide a model of transport scaling in an RFP which can evaluate the global parameters describing the plasma confinement performance. Starting from a magnetic field configuration …
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Tearing of Vaginal Tissue under Biaxial Loading: Implications for Women's Health
… tissue is subjected to biaxial loads until tearing to reveal its mechanical properties. The resulting large inhomogeneous deformations are measured by the digital image correlation optical method to calculate material strain. The influence of these strains near to and far from the immediate …
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Stabilization of the tearing mode by turbulent diffusion and runaway electrons
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1986.
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Experimental investigation of tearing fracture in sheets under quasi-static loading
Although there has been interest in the behavior of metal plates under blast and projectile loading for many years, definitive open-source analysis has only been recently forthcoming. This analysis is most often in the form of scaled recreations of the dynamic blast event, or "live fire" tests. New …
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Tearing of Black-Filled (N660) Synthetic Polyisoprene Rubber Vulcanizates at Various Temperatures
… The addition of carbon black affects tearing; this depends on the type and concentration of black. Tearing behavior of IR with various amount of N660 carbon black at various temperatures was investigated, and the results are compared to those obtained with natural rubber. The addition …
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Constraint and Ductile Tearing Effects on the Cleavage Fracture of Ferritic Steel
… the brittle transgranular cleavage and ductile tearing are competing failure mechanisms in ferritic steel. At metallurgical scales (<50mum), the formation and growth of the voids driving ductile crack extension likely alter the local stress fields acting on the smaller inclusions that trigger …
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3-D Modeling of Ductile Tearing Using Finite Elements: Computational Aspects and Techniques
To provide a computational framework suitable for the solution of these problems, this work also describes the parallel implementation of a nonlinear, implicit finite element code. The implementation employs an explicit message-passing approach using the MPI standard to maintain portability, a …
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Effects of prior ductile tearing on cleavage fracture in the ductile-to-brittle transition region
… of specimen size, a/W ratio and prior ductile tearing on cleavage fracture toughness values ($J\sb{c}$) measured in the ductile-to-brittle transition region of ferritic materials. In the lower-transition region, cleavage fracture often occurs under conditions of large-scale yielding but without …
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An investigation into the deformation and tearing of thin circular plates subjected to impulsive loads
… I (large ductile deformation), mode II (tensile-tearing and deformation) and mode III (transverse-shear) failure modes. The impulse is measured by means of a ballistic pendulum upon which the test plates are attached. During mode II and mode III failure the complete circumferential tearing of the …
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Effect of Crosslink Density on the Tearing of Gum Natural Rubber Cured with Dicumyl Peroxide (DCP)
ABSTRACTThe goal of the present work is to study and understand the fracture of NR vulcanized with different levels of DCP. The tensile behavior of gum natural rubber (NR) vulcanizates cured with dicumyl peroxide (DCP) was studied. The effect of crosslink density on tensile strength, tear strength, …
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Tearing resistance for fillet welds in ships exposed to grounding : a full scale test & cost implications
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1994.
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