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 20 of 94 for “"damage tolerance"”.
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Impact of Uncertainties on Structures Damage Tolerance Parameters
… Traditional fracture control methods, such as damage tolerance analysis (DTA), assume deterministic factors, considering uncertainties inherent in material properties, inspections, and operational conditions only at the final stage by applying safety factors. This research seeks to incorporate …
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Multidisciplinary Optimization and Damage Tolerance of Stiffened Structures
… when using higher order 2D shell FEM elements. A damage tolerance framework, EBF3PanelOpt, has been developed to design and analyze curvilinearly stiffened panels. The framework is written with the scripting language PYTHON and it interacts with the commercial software MSC. Patran (for geometry …
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Design of marine vessels for improved damage tolerance
… membrane tension in the shell and spreading of damage throughout the compartment. An reduced the number of web frames from optimum design six to two and increased the energy absorbed before rupture by 130%. Lesser collisions energies were found for more conservative designs which included a set …
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Damage tolerance of integrally stiffened composite plates and cylinders
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1990.
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Impact resistance and damage tolerance of composite sandwich panels
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
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Automated design of composite plates for improved damage tolerance
… composite plates subject to a local damage constraint under tensile and compressive loadings has been developed. A strain based criterion was used to obtain fracture toughness of cracked plates under tension. Results of an experimental investigation of the effects of simulated …
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Mechanisms of damage tolerance and arrest in pressurized composite cylinders
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1996.
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DNA damage tolerance and mutagenesis : the regulation of S. cerevisiae Rev1
DNA damage constantly challenges the integrity of genetic material during the lifetime of every cell. Accurate duplication of DNA and its proper transmission to a new cell are critical to avoid mutations or loss of genetic information that ultimately may cause altered cellular functions, cell …
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Damage resistance and damage tolerance of thin composite facesheet honeycomb panels
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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Damage tolerance and arrest characteristics of pressurized graphite/epoxy tape cylinders
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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Damage Control Measures in Composites: Focus on Damage Tolerance of Aerospace Structures
<p>Barely Visible Impact Damage (BVID) in composite materials presents a stealthy yet significant risk to structural integrity, particularly challenging due to its elusive nature. The approach adopted here diverges from traditional methodologies, focusing on the novel application of Digital Image …
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Strain rate effects on tensile fracture and damage tolerance of composite laminates
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1992.
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Damage tolerance of pressurized graphite/epoxy tape cylinders under uniaxial and biaxial loading
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
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Magnetic polyamide 6 nanocomposites for increasing damage tolerance through self-healing of composite structures.
… materials have the ability to repeatedly repair damages that occur before complete failure of materials. The development of stimuli-responsive self-healing materials has been in demand recently for composite structures, since their failure is relatively uncertain and can result in major expenses. …
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Damage tolerance of composite honeycomb sandwich panels under quasi-static bending and cyclic compression
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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Analysis of NusA's roles in DNA repair and damage tolerance pathways in Escherichia coli
… However, its role in DNA repair and damage tolerance has not been explored until recently. Cohen et al. proposed for the first time that NusA functions as a coupling factor in transcription-coupled translesion synthesis (TC-TLS) and nucleotide excision repair (TCR) processes. A very …
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Regulation of DNA damage tolerance : studies of the translesion synthesis DNA ploymerase eta in Saccharomyces cerevisiae
All organisms must control the effects of DNA damage to protect the integrity of their genomes. In addition to DNA repair, this requires DNA damage tolerance pathways, which allow the continuation of essential processes in the presence of DNA damage. One such mechanism is translesion synthesis …
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Improving Damage Tolerance of Composite Sandwich Structures Subjected to Low Velocity Impact Loading: Experimental and Numerical Analysis
… However, there is a need to develop better damage tolerant sandwich structures since conventional composite facing skins exhibit low impact resistance in the transverse direction. Here, composite skin sandwich structures with three different impact resistant core materials were fabricated …
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