نتایج جستجو برای: ductility factor

تعداد نتایج: 848839  

Journal: :IOP Conference Series: Earth and Environmental Science 2021

Journal: :Bulletin of the New Zealand Society for Earthquake Engineering 2004

Ahmadreza Torabipour Mahmoudreza Shiravand,

Due to lack of the proper and well behavior of steel moment-resisting connections subjected to the great and major earthquakes, excessive researches have been conducted to mitigate the damages on the primary elements and connections. Therefore, elimination of residual drift and increasing the plastic rotation capacity for the connectors in the panel zone are required. The main purpose of this s...

Journal: :Bulletin of the New Zealand Society for Earthquake Engineering 1980

Journal: :Physical review letters 2010
Fadi Abdeljawad Mikko Haataja

At low temperatures, monolithic bulk metallic glasses (BMGs) exhibit high strength and large elasticity limits. On the other hand, BMGs lack overall ductility due to highly localized deformation mechanisms. Recent experimental findings suggest that the problem of catastrophic failure by shear band propagation in BMGs can be mitigated by tailoring microstructural features at different length sca...

2017
Evan Ma Ting Zhu

Metals can be processed to reach ultra-high strength, but usually at a drastic loss of ductility. Here, we review recent advances in overcoming this tradeoff, by purposely deploying heterogeneous nanostructures in an otherwise single-phase metal. Several structural designs are being explored, including bimodal, harmonic, lamellar, gradient, domain-dispersed, and hierarchical nanostructures. The...

2016
M. Huang G. H. Fan L. Geng G. J. Cao Y. Du H. Wu T. T. Zhang H. J. Kang T. M. Wang G. H. Du H. L. Xie

Layered Ti-Al metal composite (LMC) fabricated by hot-pressing and hot-rolling process displays higher ductility than that of both components. In this paper, a combination of digital image correlation (DIC) and X-ray tomography revealed that strain delocalization and constrained crack distribution are the origin of extraordinary tensile ductility. Strain delocalization was derived from the tran...

2016
Megumi Kawasaki Byungmin Ahn Praveen Kumar Jae-il Jang Terence G. Langdon

The processing of metals through the application of severe plastic deformation (SPD) techniques provides the potential for achieving exceptional grain refinement leading to ultrafine-grained (UFG) materials in bulk solids. These materials generally exhibit high strength but very limited ductility at room temperature (RT) leading to the so-called paradox of strength and ductility. The recent dev...

2009
E. M. Hines L. A. Fahnestock

The authors propose a design philosophy for steel buildings in moderate seismic regions that draws on familiar concepts of ductility and capacity design, but also integrates the concepts of reserve capacity, elastic flexibility and strength to broaden the field of design possibilities. The paper discusses structural systems representing each of these concepts: Moderate-Ductility Concentrically-...

2013
D. J. Magagnosc R. Ehrbar G. Kumar M. R. He J. Schroers D. S. Gianola

Widespread adoption of metallic glasses (MGs) in applications motivated by high strength and elasticity combined with plastic-like processing has been stymied by their lack of tensile ductility. One emerging strategy to couple the attractive properties of MGs with resistance to failure by shear localization is to employ sub-micron sample or feature length scales, although conflicting results sh...

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