Relevant bibliographies by topics / Ductility

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Ductility'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 June 2025

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Journal articles on the topic "Ductility"

1

Mander, John B. "Beyond ductility." Bulletin of the New Zealand Society for Earthquake Engineering 37, no. 1 (March 31, 2004): 35–44. http://dx.doi.org/10.5459/bnzsee.37.1.35-44.

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Although the precepts of capacity design and detailing for ductile performance are now well established, the end-user community is now demanding more in terms of predictable performance with an expectation that structures should survive earthquakes with minimal and preferably no damage. The paper first explains the shortcomings of present designs from a probabilistic fragility point-of-view, and then goes on to explain how performance can be improved by making a paradigm shift. This paper examines the emerging quest where structural engineering researchers are investigating design alternatives that strive for damage avoidance.
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Zhu, Yuntian T., and Xiaozhou Liao. "Retaining ductility." Nature Materials 3, no. 6 (June 2004): 351–52. http://dx.doi.org/10.1038/nmat1141.

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Reyes-Salazar, Alfredo. "Ductility and ductility reduction factor for MDOF systems." Structural Engineering and Mechanics 13, no. 4 (April 25, 2002): 369–85. http://dx.doi.org/10.12989/sem.2002.13.4.369.

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Darveaux, Robert, Michael Johnson, and Corey Reichman. "Solder Joint Ductility." International Symposium on Microelectronics 2012, no. 1 (January 1, 2012): 001046–56. http://dx.doi.org/10.4071/isom-2012-thp15.

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Solder joint arrays were tested under tensile loading to determine the strain-to-failure (ductility) under a wide range of conditions. The trends in ductility with alloy, joint size, pad metallization, and test conditions were quantified and discussed. 63Sn37Pb solder joints showed a significant increase in ductility as applied stress is reduced below 40MPa. Lead free alloy ductility was much less sensitive to applied stress level. Hence, at low stress levels, eutectic SnPb has greater ductility than the lead free alloys. Larger joints showed greater ductility in a constant crosshead rate test compared to smaller joints. This is believed to be a function of the load train stiffness. Such a discrepancy was not observed in the constant load test method.
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Grocholski, Brent. "Pathways for ductility." Science 370, no. 6512 (October 1, 2020): 70.12–72. http://dx.doi.org/10.1126/science.370.6512.70-l.

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Sealy, Cordelia. "Defects define ductility." Materials Today 10, no. 4 (April 2007): 15. http://dx.doi.org/10.1016/s1369-7021(07)70041-x.

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Gensamer, Maxwell. "Strength and Ductility." Metallography, Microstructure, and Analysis 6, no. 2 (March 30, 2017): 171–85. http://dx.doi.org/10.1007/s13632-017-0341-1.

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Wang, H., Y. Zhang, and S. Qin. "A Study on Ductility of Prestressed Concrete Pier Based on Response Surface Methodology." Engineering, Technology & Applied Science Research 6, no. 6 (December 18, 2016): 1253–57. http://dx.doi.org/10.48084/etasr.855.

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The ductility of prestressed concrete pier is studied based on response surface methodology. Referring to the pervious prestressed concrete pier, based on Box-Behnken design, the ductility of 25 prestressed concrete piers is calculated by numerical method. The relationship between longitudinal reinforcement ratio, shear reinforcement ratio, prestressed tendon quantity, concrete compressive strength and ductility factor is gotten. The influence of the longitudinal reinforcement ratio, the shear reinforcement ratio, the prestressed tendon quantity and concrete compressive strength to curvature ductility is discussed. Then the ductility regression equation is deduced. The result showed that the influence of the prestressed tendon quantity to the ductility of prestressed concrete pier is significant. With the increasing of the prestressed tendon quantity, the curvature ductility curved reduces. With the increasing of shear reinforcement ratio and compressive strength of concrete, the curvature ductility increases linearly. And the influence of the longitudinal reinforcement ratio to ductility of the prestressed concrete pier is insignificant.
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Wang, H., Y. Zhang, and S. Qin. "A Study on Ductility of Prestressed Concrete Pier Based on Response Surface Methodology." Engineering, Technology & Applied Science Research 6, no. 6 (December 18, 2016): 1253–57. https://doi.org/10.5281/zenodo.225511.

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The ductility of prestressed concrete pier is studied based on response surface methodology. Referring to the pervious prestressed concrete pier, based on Box-Behnken design, the ductility of 25 prestressed concrete piers is calculated by numerical method. The relationship between longitudinal reinforcement ratio, shear reinforcement ratio, prestressed tendon quantity, concrete compressive strength and ductility factor is gotten. The influence of the longitudinal reinforcement ratio, the shear reinforcement ratio, the prestressed tendon quantity and concrete compressive strength to curvature ductility is discussed. Then the ductility regression equation is deduced. The result showed that the influence of the prestressed tendon quantity to the ductility of prestressed concrete pier is significant. With the increasing of the prestressed tendon quantity, the curvature ductility curved reduces. With the increasing of shear reinforcement ratio and compressive strength of concrete, the curvature ductility increases linearly. And the influence of the longitudinal reinforcement ratio to ductility of the prestressed concrete pier is insignificant.
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Urbini, Flavio, Emanuela Caracuzzo, Antonio Chirumbolo, and Antonino Callea. "Individual and Organizational Ductility: Conceptualization, Development, and Validation of a New Scale." Behavioral Sciences 14, no. 6 (June 20, 2024): 511. http://dx.doi.org/10.3390/bs14060511.

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In this article, we conceptualize a new construct named “ductility” and propose a measurement instrument. We examine psychometric properties—the factorial validity and reliability of the Ductility Scale in Italy. The results of exploratory factor analysis showed that the scale has a two-factor structure, namely, individual and organizational ductility. The scale reliability was excellent for both dimensions (individual ω = 0.82; organizational ω = 0.85). The participants were employees from private and public organizations (n = 466). We tested the construct validity of the Ductility Scale. The invariance of the measurement model tested via multigroup confirmative factor analysis showed that the Ductility Scale was invariant across gender. In addition, we found ductility to be positively related to proactive personality and work engagement. These preliminary results show that the Ductility Scale is a reliable and valid measure. In addition, our findings illustrate the potential usefulness of the ductility construct via the newly developed scale.
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Dissertations / Theses on the topic "Ductility"

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Mohamed, Z. M. E. Q. "Hot ductility of steels." Thesis, City University London, 1988. http://openaccess.city.ac.uk/8348/.

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The hot tensile test has been used for a variety of steels, to investigate the influence of such factors as inclusions, precipitation, phase transformation and grain size on hot ductility. Tests were performed in the temperature range 700-1000 °C and at a strain .4 _2 1 rates of (10 —10 S ), generally to simulate the conditions experienced during the straightening operation in the continuous casting process in which transverse cracks propagate. Two zones of reduced ductility can be identified. The Y-a transformation zone which has been shown to produce a significant ductility trough due to strain concentration in the softer ferrite films surrounding the V grains, cating voiding around he MnS inclusions which link to give intergranular failure, and factors which alter the A3 temperature, such as carbon content, have been shown to produce a change in the temperature at which the ductility trough occurs. The second zone of reduced hot ductility was observed in the austenite region, due to the retardation of dynamic recrystallisation associated with the presence of fine carbides, nitrides and/or inclusions precipitates at the austenite grain boundaries, which allows intergranular cracks to develop. The depth and width of this ductility trough is primarily dependent on the size and amount of precipitates present. The influence of MnS inclusions in reducing hot ductility has been noted above and below the Ae3 temperature. Above the Ae3 , inclusions act in a similar way to fine precipitation preventing dynamic recrystallisation and below the Ae3 , they offer more sites for micro-voiding to occur. Although grain size refinement improves ductility, it does so as long as similarity in precipitate volume fraction and size exist. Improved hot ductility has been achieved by adding Ca to the steel which reduces the amount of l9nS inclusions precipitated during cooling from solution temperature at the austenite grain boundaries.
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Abu, Shousha R. I. "Hot ductility of steels." Thesis, City University London, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305120.

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Wassouf, Mohamad. "Bond and ductility of concrete reinforced with various steel bars surface and ductility conditions." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/6272/.

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Reinforced concrete is a wide field for researches and studies in civil engineering subject. It is due to the fact that reinforced concrete is the most widely used material for the infrastructure in the world. Reinforced concrete consists of two main materials: reinforcing steel and concrete, each of those two materials has its own effect on the performance of the structure. In this thesis, the change in RC performance due to different steel properties and specifications will be investigated. The study focuses on the bond interaction between steel and concrete and the flexural behaviour of RC beams. Pull-out forces have been exerted on the reinforcing bars in RC blocks to examine the impact of steel properties on the bond strength and failure mode of the blocks. In addition to that, flexural tests have been conducted on simply supported RC beams to investigate how reinforcement properties can affect the ductility of reinforced concrete. Comparison of results of the previous two tests with codes and analytical models have been carried out to verify the outcome of this research.
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Crowther, David Neville. "The hot ductility of steels." Thesis, City, University of London, 1986. http://openaccess.city.ac.uk/19368/.

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Hot tensile tests have been performed on a variety of plain carbon and micro-alloyed steels, in order to determine the influence of such factors as phase transformation, grain size and precipitation on hot ductility. The γ-∝ phase transformation has been shown to produce a significant ductility trough in the high temperature tensile behaviour of plain C steels, and factors which alter the A3 temperature, such as cooling rate and C content, have been shown to produce a change in the temperature at which the ductility trough occurs. This ductility trough is due to strain concentration in the ferrite films surrounding the grains, leading to intergranular failure. It has also been shown that an increase in grain size can increase the depth and width of this ductility trough. For plain C steels with a C content of 0.35% or above, and for some micro-alloyed steels, a ductility trough may also be present in the single phase austenite region. For the plain C steel, this is. believed to be due to the increase in activation energy for deformation associated with increasing C contents. In microalloyed steels, the trough is due to the retardation of dynamic recrystallization associated with the presence of fine carbide and/or nitride precipitates, which allows intergranular cracks to develop. The depth and width of this ductility trough is primarily dependent on the size and amount of precipitates present, although it has been shown that grain size has a secondary effect. In C-Mn-Nb-Al steels, factors which tend to reduce hot ductility by reducing precipitate size and/or increasing the amount of precipitate present include the reheating of tensile samples cast 'in-situ', the introduction of temperature oscillations during COOling from solution temperature, and the presence of large amounts of'dynamic' precipitates formed during tensile testing. In C-Mn-V-Al steels, 'dynamic' precipitates do not have such an adverse effect. Strain rate was also shown to have an important influence on hot ductility, and decreasing strain rates have been Shown to reduce hot ductility in both plain carbon and micro-alloyed steels.
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Eon, Kang Shin. "Hot ductility of TWIP steels." Thesis, City University London, 2014. http://openaccess.city.ac.uk/13703/.

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TWIP (Twining Induced Plasticity) steel is very promising AHSS (Advanced High Strength Steel) grade owing to its superior toughness and ductility. Recently it has attracted the interest of the automotive and steelmaking industries, as the need for reducing weight to provide better fuel efficiency is of paramount importance with the gradual depletion of fuel resources. A high Al, TWIP steel is being commercially developed as Al has been found very well in delaying fraction in deep drawn products. However these steels are difficult to continuous cast and cracking can occur at the slab surface. Therefore it becomes very important to gain an understanding of the cause of this cracking, in order to prevent their occurrence. To assess the likelihood of the cracking in these high Al TWIP steel slabs (1~1.5%Al, 0.6%C, 18%Mn), conventional hot tensile tests were performed to simulate the continuous casting process. A variety of TWIP steels were tested in order to determine the influence of such factors as chemical composition, cooling rate and thermal cycle on hot ductility. Using a cooling rate of 60oC/min after heating to 1250oC, ductility was generally <40% RA (Reduction of Area) indicating that these high Al TWIP steels it will be difficult to cast without transverse cracking occurring. The 1.5%Al containing steels had worse ductility than the low Al containing steels (0.02%Al) because of the presence of large amounts of AlN precipitated at the austenite grain boundaries. Reducing the Al and N level improved ductility. Higher strength Nb/V high Al containing TWIP steels were also examined although ductility was likely to be worse than the simpler microalloying free TWIP steels as was confirmed. Increasing the cooling rate from 60 to 180oC/min after melting caused the ductility to further deteriorate and high N levels produced only a small reduction in the ductility, probably because ductility is so poor. Increasing the S level from 0.003 to 0.01% caused the ductility to deteriorate in TWIP steels free of microalloying. Increasing the S level to 0.023% caused no further deterioration in ductility even though the MnS volume fraction increased. The worse ductility in the higher S steels was not caused by a simple increase in the sulphide volume fraction but more a consequence of the change from coarse hexagonal plate AlN, which are mainly within the matrix and so have little influence on the hot ductility, to very long dendritic rod precipitates, which are situated at the dendritic or close to the austenite grain boundaries. This dendritic precipitation was rarely observed in the low S steel. The MnS inclusions appeared to act as nucleation sites for the precipitation of AlN and when there was few inclusions precipitation of AlN was mainly confined to the matrix. The ductility of Nb containing high Al, TWIP steels was very poor in the as-cast condition. Adding B and Ti still gave rise to extremely poor ductility when a cooling rate of 60 oC/min was used but reducing it to 12oC/min caused the ductility to improve so that RA values were now close to the 35~40% RA value required to avoid transverse cracking. To improve ductility B and Ti additions were examined. 0.04%Ti and 0.002%B are required to ensure good hot ductility in high Al, TWIP steels. Sufficient Ti is needed to remove all the N as TiN so preventing AlN precipitating as films over the austenite grain surfaces. B is also needed as it can segregate to the boundaries and strengthen them. A SIMS technique confirmed that B had indeed segregated to the boundaries. The slower cooling rate 10~15oC/min compared to 60oC/min will result in the optimum segregation of B as well as coarsening the TiN precipitates so they are no longer effective in reducing the ductility. Following all these recommendations, i.e. a low S level, slow secondary cooling rate, a Ti level above the stoichiometric for TiN and a boron addition of 0.002%, transverse cracking was avoided commercially in these very difficult to cast high strength TWIP steels.
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Occhiuzzi, Antonio. "Seismic ductility of base isolated structures." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/35011.

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Henriques, José Alexandre Gouveia. "Ductility requirements in shear bolted connections." Master's thesis, Departamento de Engenharia Civil, 2007. http://hdl.handle.net/10316/15762.

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Soesianawati, M. T. "Limited ductility design of reinforced concrete columns." Thesis, University of Canterbury. Department of Civil Engineering, 1986. http://hdl.handle.net/10092/3643.

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This report describes an experimental and analytical investigation of the strength and ductility of reinforced concrete columns. Four columns of square cross-section were tested under axial compression loading and cyclic lateral loading applied at mid-height which simulated seismic loading. The main variable investigated was the quantity of transverse confining steel used, which ranged between 17 to 46 percent of the NZS 3101:1982 recommended quantity for ductile detailing. The experimental results are reported in the form of lateral loaddisplacement and lateral load-curvatures hysteresis loops, curvature profiles, transverse steel strain distributions and concrete compressive strains. The results are discussed and compared with the analytical predictions. A modified equation for the quantity of confining reinforcement in rectangular columns is recommended. Conclusions are made regarding the ductility available from columns containing substantially less transverse confining reinforcement than recommended by the New Zealand concrete design code.
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Lobato, de Sousa Monteiro de Morais Miguel Nuno. "Ductility of beams prestressed with FRP tendons." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614171.

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Wolff, Ira M. "Ductility in high chromium super-ferritic alloys." Doctoral thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/22200.

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Includes reprints of author's related articles.<br>Bibliography: pages 187-201.<br>The competition between microfracture and plastic flow has been studied in relation to the thermomechanical processing parameters and minor element chemistry of wrought super-ferritic alloys based on a composition of Fe-40wt% Cr. These alloys have been developed for corrosion-resistant applications, specifically by micro-alloying with platinum group metals to induce cathodic modification, but their use has been hampered by inadequate toughness at ambient temperatures. Brittle cleavage of the alloys is a consequence of the high resistance to plastic flow required to accommodate local stresses, such as those found ahead of a loaded crack. Once initiated, a crack propagates in a brittle manner with minimal ductility. The impact toughness therefore relies on the ability of the alloys to withstand crack initiation. The frequency of the crack initiation events is related to the distribution of secondary phases within the matrix and at the grain boundaries. A direct means of improving the toughness and the ductility is accordingly via annealing cycles and minor alloying additions to control the precipitation of second phases. The ductility is enhanced by raising the mobile dislocation density, and this may be achieved by pre-straining recrystallised material, or increasing the number of dislocation sources in the otherwise source-poor material. The generation of mobile dislocations by prismatic punching at second phase particles in response to local or tessellated stresses was found to increase the ductility and the impact toughness of the alloy. The addition of nickel also increases the brittle fracture resistance by promoting stress accommodation at the crack tip, a result which can, in principle, be explained on the basis of enhanced dislocation dynamics. The tendency of the alloys to form a stable recovered substructure was identified as a critical parameter for both the mechanical and corrosion properties. The low-angle dislocation sub-arrays contribute to overall strain-hardening, but destabilise the passivity of the alloys in acid media. In practice, rationalisation of the microstructural parameters has enabled the practicable fabrication of tough, corrosion-resistant alloys, suitable for commercial development.
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Books on the topic "Ductility"

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Zhao, Yonghao, and Xiaozhou Liao. Ductility of bulk nanostructured materials. Stafa-Zurich, Switzerland: Trans Tech, 2010.

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Gioncu, Victor. Ductility of seismic resistant steel structures. New York: Spon Press, 2001.

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M, Mazzolani Federico, ed. Ductility of seismic resistant steel structures. London: Spon Press, 2002.

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1943-, Usami Tsutomu, Itoh Yoshito 1952-, and International Colloquium on Stability and Ductility of Steel Structures (5th : 1997 : Nagoya, Japan), eds. Stability and ductility of steel structures. Amsterdam: Elsevier, 1998.

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Guha, Sumit. Improving the low temperature ductility of NiAl. [Washington, DC]: National Aeronautics and Space Administration, 1992.

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Salomon, R. J. The ductility behaviour of incoloy alloy MA956. Birmingham: University of Birmingham, 1994.

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O, Scattergood Ronald, and United States. National Aeronautics and Space Administration., eds. Ductile-regime turning of germanium and silicon. [Washington, DC: National Aeronautics and Space Administration, 1989.

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O, Scattergood Ronald, and United States. National Aeronautics and Space Administration., eds. Ductile-regime turning of germanium and silicon. [Washington, DC: National Aeronautics and Space Administration, 1989.

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V, Nathal Michael, and United States. National Aeronautics and Space Administration., eds. Tensile behavior of Fe-40A1 alloys with 8 and Zr additions. [Washington, DC]: National Aeronautics and Space Administration, 1986.

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V, Nathal Michael, and United States. National Aeronautics and Space Administration., eds. Tensile behavior of Fe-40A1 alloys with 8 and Zr additions. [Washington, DC]: National Aeronautics and Space Administration, 1986.

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Book chapters on the topic "Ductility"

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Sandström, Rolf. "Creep Ductility." In Basic Modeling and Theory of Creep of Metallic Materials, 257–73. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-49507-6_13.

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AbstractFor a number of creep resistant steels, the creep ductiliy decreases with increasing temperature and time. As a function of stress, the ductiity is often describe with an S-shaped curve with an upper and a lower shelf level. As a function of time, the S-shape is inverted. If the ductility is high, the rupture is referred to as ductile, and for low ductility levels as brittle. Ductile rupture is believed to be due to a plastic instability such as necking. Brittle rupture on the other hand is controlled by the nucleation, growth and linkage of creep cavities. With the help of the basic models for creep deformation and cavitation, the rupture stress and ductility can be predicted. Several models exist for the influence of multiaxiality on the creep ductility. Although the models are based on different principles, they predict approximately the same behavior, which is verified by comparison to rupture data for notched bars.
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Gooch, Jan W. "Ductility." In Encyclopedic Dictionary of Polymers, 247. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_4087.

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Bhanja, Santanu. "Ductility design." In Reinforced Concrete Design, 277–305. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003415398-17.

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Zeris, C. "Behavior Factor and Ductility." In Encyclopedia of Earthquake Engineering, 1–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-36197-5_118-1.

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Zeris, Christos A. "Behavior Factor and Ductility." In Encyclopedia of Earthquake Engineering, 260–80. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-35344-4_118.

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Bhadeshia, Harshad K. D. H. "Ductility, Toughness and Fatigue." In Pearlite in Steels, 94–142. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781032631981-5.

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Papagiannopoulos, George A., George D. Hatzigeorgiou, and Dimitri E. Beskos. "Ductility-Based Plastic Design." In Seismic Design Methods for Steel Building Structures, 195–228. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80687-3_6.

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Tsuji, Nobuhiro, Shigenobu Ogata, Haruyuki Inui, Isao Tanaka, and Kyosuke Kishida. "Proposing the Concept of Plaston and Strategy to Manage Both High Strength and Large Ductility in Advanced Structural Materials, on the Basis of Unique Mechanical Properties of Bulk Nanostructured Metals." In The Plaston Concept, 3–34. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-7715-1_1.

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AbstractAdvanced structural materials are required to show both high strength and large ductility/toughness, but we have not yet acquired the guiding principle for that. The bulk nanostructured metals are polycrystalline metallic materials having bulky dimensions and average grain sizes smaller than 1 μm. Bulk nanostructured metals show very high strength compared with that of the coarse-grained counterparts, but usually exhibit limited tensile ductility, especially small uniform elongation below a few %, due to the early plastic instability. On the other hand, we have recently found that particular bulk nanostructured metals can manage high strength and large tensile ductility. In such bulk nanostructured metals, unusual deformation modes different from normal dislocation slips were unexpectedly activated. Unusual &lt;c+a&gt; dislocations, deformation twins with nano-scale thickness, and deformation-induced martensite nucleated from grain boundaries in the bulk nanostructured Mg alloy, high-Mn austenitic steel, and Ni-C metastable austenitic steel, respectively. Those unexpected deformation modes enhanced strain hardening of the materials, leading to high strength and large tensile ductility. It was considered that the nucleation of such unusual deformation modes was attributed to the scarcity of dislocations and dislocation sources in each recrystallized ultrafine grain, which also induced discontinuous yielding with clear yield drop universally recognized in bulk nanostructured metals having recrystallized structures. For discussing the nucleation of different deformation modes in atomistic scales, the new concept of plaston which considered local excitation of atoms under singular dynamic fields was proposed. Based on the findings in bulk nanostructured metals and the concept of plaston, we proposed a strategy for overcoming the strength-ductility trade-off in structural metallic materials. Sequential nucleation of different deformation modes would regenerate the strain-hardening ability of the material, leading to high strength and large tensile ductility. The strategy could be a guiding principle for realizing advanced structural materials that manage both high strength and large tensile ductility.
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Wang, Qi, and Shunzhong Yao. "Seismic Performance Analysis of Non-uniformly Corroded Reinforced Concrete Column Assembly Joints Strengthened with CFRP." In Novel Technology and Whole-Process Management in Prefabricated Building, 279–87. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-5108-2_30.

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AbstractIn order to analyze the seismic behavior of non uniformly corroded reinforced concrete column assembly joints strengthened with CFRP. In this paper, one corroded and unreinforced RC column specimen and four corroded but CFRP Reinforced RC column specimens were fabricated. According to the hysteretic curve, the skeleton curve change and stiffness degradation of each specimen are analyzed, and the load displacement condition of the assembled joint is judged. According to the strain of the assembled joint of reinforced concrete column, the ductility, energy consumption and other properties of each joint are analyzed, so as to analyze the seismic performance of the specimen. The results show that the unreinforced reinforced concrete column specimens have small ductility, low energy consumption and poor seismic effect; The reinforced concrete column specimens strengthened with CFRP have larger ductility, higher energy consumption and better seismic performance. Conclusion: the seismic performance is related to the stiffness, ductility coefficient, energy dissipation coefficient and other indicators. The larger the above indicators, the better the seismic performance, which plays an important role in improving the stability of the assembly structure.
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Moritoki, Hitoshi. "Free Surface Ductility in Upsetting." In Anisotropy and Localization of Plastic Deformation, 647–50. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3644-0_151.

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Conference papers on the topic "Ductility"

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Muñoz Irigoyen, Carlos Alejandro, Oscar Alberto López Bátiz., and José de la Cruz Sebastián Serrano Vega. "Comparison of the behavior of Reinforced Concrete Frame Structures Designed with low Ductility and High Ductility." In IABSE Congress, San José 2024: Beyond Structural Engineering in a Changing World, 1265–73. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2024. https://doi.org/10.2749/sanjose.2024.1265.

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&lt;p&gt;This study presents a comparative analysis of the behavior of reinforced concrete frame structures, with an emphasis on the influence of reinforcement and detailing in connections. During the earthquakes that occurred in Turkey on February 6, 2023, the performance of this type of system without proper connection detailing was inadequate. In this article, the behavior of three buildings is analytically simulated, considering three levels of detailing: the first with a strength-based detailing level, the second with a low ductility level (Q=2), and the third with a high ductility level (Q=4). The obtained results highlight the influence of detailing on the behavior of reinforced concrete structures under seismic incidents.&lt;/p&gt;
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Caruso, Matthew, Samuel Crowley, and Lesley Frame. "Hot Ductility of 70/30 Copper-Nickel Alloys." In IFHTSE 2024, 179–82. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.ifhtse2024p0179.

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Abstract Ductility dip cracking (DDC) is a detrimental solid-state cracking phenomenon that can occur during welding of copper-nickel (Cu-Ni) alloys used in naval vessels. The presence of these cracks has several deleterious effects, including reduced fatigue life and increased susceptibility to corrosion. The mechanism of DDC remains highly debated and understudied, especially in material systems outside of Ni-Cr-Fe alloys. The predominant mechanisms that have been proposed include: 1. Grain boundary sliding, 2. Precipitate-induced strain, and 3. Impurity element segregation. In the present body of research, thermal-mechanical testing over a wide range of strain rates and temperatures was performed using a Gleeble 3500. Both flow-stress and fracture morphology of wrought 70/30 Cu- Ni are considered. Following fracture, microstructural analyses using both scanning electron microscopy and optical microscopy were conducted to observe and quantify intergranular cracking and fracture surface features. Results show a strong correlation among fracture morphology, ductility, and temperature.
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Komai, Nobuyoshi, Ko Arisue, Keita Hashimoto, Nobuhiko Saito, and Kimihiko Tominaga. "Creep Rupture Strength and Ductility of Grade 92 Steel." In AM-EPRI 2024, 461–72. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.am-epri-2024p0461.

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Abstract This study aims to elucidate the chemical compositions and microstructural factors that affect longterm creep rupture strength and creep rupture ductility using multiple heats of Gr.92 steel. Evaluating the reduction behavior in long-term creep rupture strength, we propose a relative creep rupture strength value, which is expressed as the logarithmic ratio of the estimated creep strength for each rupture time exceeding 10,000 hours, with 10,000 hours as the reference. Higher initial hardness correlates with greater pronounced strength reduction in the long-term regime. While smaller prior austenite grain sizes lead to greater reductions in creep rupture strength, this effect diminishes above 30 μm. However, no clear correlation was observed between Cr content and creep strength reduction in this study. Brittle creep ruptures with smooth test specimens were observed just below the extensometer ridge in the parallel section of test specimen, indicating notch weakening. Even in heats with excellent creep ductility, the amount of inclusions tended to be higher than in heats with lower creep ductility. Factors other than inclusions also seem to influence long-term creep ductility.
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Bryant, Jon R., and Ernst Wallis. "Ductility of Precipitation Hardenable Nickel Alloy Following Hydrogen Absorption." In CORROSION 1988, 1–14. NACE International, 1988. https://doi.org/10.5006/c1988-88068.

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Abstract This study was undertaken to better define the effects of hydrogen absorption on the ductility of alloy UNS N05500. Samples were cathodically charged with hydrogen followed by slow strain rate tensile testing. The samples consisted of forged rods and one piece of cold rolled strip. For comparison, alloy UNS N07718 was also tested in rod and strip form. Tensile strength increased as a function of charging time (1-15 days) and the ductility clearly dropped as measured by percent loss in elongation. Strip material was more susceptible to hydrogen embrittlement than the rod specimens for both materials. The degree of ductility loss for the UNS N07718 alloy was clearly less than the UNS N05500 alloy. Finally, a series of tests were conducted to measure the galvanic corrosion potential between alloy UNS N05500 and carbon steel in a 0.1 N NaCl solution at 77 F (25 C) and 176 F (80 C) purged with carbon dioxide (CO2) and a second series purged with air.
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Poirier, D., B. Guerreiro, B. Jodoin, A. Weck, and J. D. Giallonardo. "Laser Heat Treatment for Improved Cold-Sprayed Copper Coating Ductility." In ITSC 2025, 376–83. ASM International, 2025. https://doi.org/10.31399/asm.cp.itsc2025p0376.

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Abstract This work aims to evaluate the viability of laser heat treatments as a method to recover cold-sprayed coating ductility, i.e., to achieve with laser heat treatment a gain in elongation equivalent to a furnace heat treatment. A 4kW YAG laser was employed to heat treat 4-5 mm thick coldsprayed copper coatings produced on coupons and on prototypes of large components. Surface temperatures were monitored during the heat treatment using an infrared camera. Hardness and tensile properties were measured on as-sprayed and heat-treated coatings. Microstructural examinations provided additional insights to explain the properties evolution during heat treatment.
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Piermattei, E. J., B. F. Ronalds, and D. J. Stock. "Jacket Ductility Design." In Offshore Technology Conference. Offshore Technology Conference, 1990. http://dx.doi.org/10.4043/6383-ms.

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Moghaddam, Hasan A., and Maysam Samadi. "On the Effect of Ductility of Confining Material on Concrete Ductility." In Structures Congress 2009. Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41031(341)28.

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Şen, Ornela Lalaj, Mehmet Çevik, and Ali Haydar Kayhan. "Sectional Ductility of Wide Beams." In International Students Science Congress. Izmir International Guest Student Association, 2021. http://dx.doi.org/10.52460/issc.2021.051.

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Wide beam structures are categorized as Limited Ductility Class in Turkey and elsewhere and considered not fit for construction in areas of high seismicity. One of the main reasons that wide beam structures are considered to possess limited ductility is the perceived low local ductility of the wide beams, due to the high reinforcement ratios. Wide beams have small depths, which indeed require higher reinforcement ratios to produce the necessary moment capacities, as compared to normal beams. However, the low local ductility of the wide beams can be contested. This paper presents a database of more than 150 beam sections, some of which are normal and some of which are wide beams. The moment-rotation relationships were computed for all the sections, and the sectional ductility was calculated from the yield and ultimate rotations. The relations between sectional ductility and other parameters such as section aspect ratio, longitudinal reinforcement ratio and transverse reinforcement ratio were investigated. An example of the relation between ductility and section properties, in this case section aspect ratio is shown. Both positive and negative ductility were calculated and plotted. It should be noted that beams with section ratio of 0.5 are conventional beams, while the rest are wide beams. The values of ductility vary for all beams, and conventional beams have a slightly wider spread. While these parameters vary within the section database, the sectional ductility oscillates around 30, and no clear correlations could be established for any of the above-mentioned parameters. There were no significant differences between the average sectional ductility of conventional and wide beams. For this dataset, the mean positive ductility was 29.66 and 29.33 for conventional and wide beams respectively, and the mean negative ductility was 28.96 and 31.50 for conventional and wide beams, respectively.
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Orlacchio, Mabel, Georgios Baltzopoulos, and Iunio Iervolino. "CONSTANT-DUCTILITY RESIDUAL DISPLACEMENT RATIOS." In 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering Methods in Structural Dynamics and Earthquake Engineering. Athens: Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece, 2019. http://dx.doi.org/10.7712/120119.7271.18881.

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Yamaguchi, N., and M. Nakao. "Ductility-Related Force Modification Factors of Wood Constructions with Shear Walls of Different Ductility." In ATC and SEI Conference on Improving the Seismic Performance of Existing Buildings and Other Structures. Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41084(364)73.

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Reports on the topic "Ductility"

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Billone, M., T. Burtseva, Y. Chen, and Z. Han. Ductility of Zircaloy-4 Sibling Pin Cladding. Office of Scientific and Technical Information (OSTI), February 2023. http://dx.doi.org/10.2172/1973847.

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Bair, Jacob, David Abrecht, Nicole Overman, Anthony Guzman, David Collins, Richard Cox, and Shawn Riechers. Improving Ductility of Hydride Embrittled Zirconium: Final Report. Office of Scientific and Technical Information (OSTI), August 2020. http://dx.doi.org/10.2172/2203117.

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Nieh, T., C. Schuh, M. Caturla, and A. Hodge. Enhancement of Strength and Ductility in Bulk Nanocrystalline Metals. Office of Scientific and Technical Information (OSTI), February 2004. http://dx.doi.org/10.2172/15013859.

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Taleff, E. M., G. A. Henshall, D. R. Lesuer, T. G. Nieh, and J. Wadsworth. Enhanced tensile ductility of coarse-grain Al-Mg alloys. Office of Scientific and Technical Information (OSTI), December 1995. http://dx.doi.org/10.2172/201796.

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Rath, B. B., M. A. Imam, B. K. Damkroger, and G. R. Edwards. High temperature ductility loss in titanium alloys -- A review. Office of Scientific and Technical Information (OSTI), February 1994. http://dx.doi.org/10.2172/10124556.

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Kang, Bruce. Ductility Enhancement of Molybdenum Phase by Nano-sized Oxide Dispersions. Office of Scientific and Technical Information (OSTI), July 2008. http://dx.doi.org/10.2172/1109082.

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Geltmacher, A., and D. A. Koss. On Specimen Shape Effects and the Ductility of Porous Metals. Fort Belvoir, VA: Defense Technical Information Center, February 1989. http://dx.doi.org/10.21236/ada206216.

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Bruce Kang. Ductility Enhancement of Molybdenum Phase by Nano-sizedd Oxide Dispersions. Office of Scientific and Technical Information (OSTI), July 2008. http://dx.doi.org/10.2172/952943.

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9

Gill. L51675 Effects of Weldment Property Variations on the Behavior of Line Pipe. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), January 1993. http://dx.doi.org/10.55274/r0010133.

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A steel weldment is a composite of zones or layers of different microstructures that possess different material properties. The zones include the base metal (or the sections of pipe), the weld metal, and a complex heat-affected zone (HAZ) of base metal that has been exposed to a variety of thermal cycles resulting in varying microstructures. The material properties of primary concern with respect to the mechanical behavior of the pipe are the stress-strain response (the constitutive properties) and the resistance to initiation and propagation of cracks or tears in the presence of a crack, notch, or other stress concentrator (the fracture toughness properties). Most of the experimental data on the behavior of welds with significant discontinuities were obtained from test specimens with surface or through-thickness notches or cracks. These data typically show an increase in load or nominal ductility for overmatched welds and a decrease in load or nominal ductility for undermatched welds. However, there are cases where the presence of a soft zone may enhance the nominal ductility and cases where overmatched welds will decrease the nominal ductility. The latter is especially likely in a girth weld with a circumferential crack in the HAZ.
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Wada, Y., R. Ishigaki, Y. Tanaka, and K. Ohnishi. DTRS-3878-HEELAS Hydrogen Environment Embrittlement of Low Alloy Steel at Room Temperature. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), January 1998. http://dx.doi.org/10.55274/r0011860.

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To verify the safety application and use of Cr-Mo steel for the high-pressure hydrogen equipment, tensile, fatigue, and crack growth tests of JIS-G4105-1979 SCM435 and 440 steel under 45MPa high-pressure hydrogen at room temperature were conducted. There were no significant differences in tensile deformation behaviors between the air environment and 45MPa hydrogen until the maximum load point. However, the hydrogen tested specimen broke with less ductility accompanied by many surface crack on the specimen surface which is caused by the specimen machining. The scatter of ductility was observed due to the specimen surface preparation conditions. As a result, reduction of ductility in the gaseous hydrogen environment is caused not only by the specimen machining effect but also by the presence of non-metallic inclusion at the surface.
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