Results 271 to 280 of about 355,992 (315)
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Evaluation of damage tolerance in aircraft structures
15th Structural Dynamics and Materials Conference, 1974The specific requirements and the evaluation procedures used to qualify the damage tolerance of two competing wing carrythrough structure designs are reviewed. One design is principally beta-processed 6A1-4V titanium in a fail safe configuration, and the other is principally 10 Ni steel in a monolithic configuration.
H. I. McHenry, E. K. Hensley
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Journal of Aircraft, 1970
The emergence of damage tolerance as a primary design consideration for new generations of aircraft is shown to be the result of concern for increased safety and reliability by airframe manufacturers and regulatory bodies. Design criteria applicable to the case of structurally damaged components are defined.
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The emergence of damage tolerance as a primary design consideration for new generations of aircraft is shown to be the result of concern for increased safety and reliability by airframe manufacturers and regulatory bodies. Design criteria applicable to the case of structurally damaged components are defined.
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Contact Damage and Damage Tolerance of Dental Ceramics
Key Engineering Materials, 2006Surface and subsurface contact damage in dental ceramics and the influence of microstructure on damage tolerance were investigated in this study through indentation methods. The dependence of the damage tolerance on common materials properties was discussed.
Yan Qiu, Yi Wang Bao, Yi Hong Liu
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Approximations in Optimization of Damage Tolerant Structures
AIAA Journal, 2000Approximations for structural response and design sensitivities signie cantly reduce the computational cost of structural optimization. To be useful, the approximation must be accurate and computationally efe cient. Damage tolerant design puts even more stringent computational demands on optimization procedures and approximations ...
John H. Garcelon +2 more
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2001
The spirit of Glare is its crack bridging mechanism, which provides superior damage tolerance properties. Depending on the specific property, Glare shows either monolithic metal or composite behaviour. This challenges the definition of strength justification and certification procedures.
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The spirit of Glare is its crack bridging mechanism, which provides superior damage tolerance properties. Depending on the specific property, Glare shows either monolithic metal or composite behaviour. This challenges the definition of strength justification and certification procedures.
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Assessment of damage tolerance in composites
Composite Structures, 1985Abstract Damage tolerance to processing and normal service damage has been assessed for carbon epoxy coupons and built-up panels in uniaxial loading. In coupons, the low velocity impact damage is more severe than damage in holes, delaminations or porosity and it causes compression strength loss from 58% at the barely visible threshold to 73% at the ...
E. Demuts, R.S. Whitehead, R.B. Deo
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Damage tolerance substantiation
1989Previous chapters dealt with analysis procedures, (Chapters 2-5), the ingredients needed for the analysis (Chapters 7-10) and with the use of the results for fracture control (Chapter 11). This Chapter concentrates on the general scope of the analysis, its relationship to tests (verification and substantiation), the assumptions and sources of error ...
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2005
Abstract This chapter presents a fracture-mechanics-based approach to damage tolerance, accounting for mechanical, metallurgical, and environmental factors that drive crack development and growth. It begins with a review of stress-intensity factors corresponding to a wide range of crack geometries, specimen configurations, and loading ...
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Abstract This chapter presents a fracture-mechanics-based approach to damage tolerance, accounting for mechanical, metallurgical, and environmental factors that drive crack development and growth. It begins with a review of stress-intensity factors corresponding to a wide range of crack geometries, specimen configurations, and loading ...
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Durability and Damage Tolerance of Composites
2001In certain structural applications the use of fiber composites is advantageous over metallic structures (lighter weight, and higher stiffness). Polymer matrix composite (PMC) materials with continuous high modulus graphite fibers are very effective under high-cycle fatigue loading due to the ability of fibers to transmit and disperse the high-frequency
Frank Abdi +2 more
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Damage Accumulation Techniques in Damage Tolerance Analysis
1984Damage tolerance analysis requires the capability to assess the damage, usually measured by incremental crack growth, accumulating in a given piece of structure under flight-by-flight spectrum loading. This requirement implies the need to process this damage accumulation over thousands of flights consisting of millions of load cycles.
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