Elevated-Temperature Properties of Carbon Steels

Simmons, Ward F.; Cross, Howard C.

doi:10.1520/stp180-eb

Cited by 9 publications

(1 citation statement)

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“…Notes The report is a supplement to ASTM STP 180 [65], often called DS 11. Relatively little data are reported for T > 538 • C. It also contains extensive data tables that summarize the chemistry and processing of the steels, but does not show any stress-strain curves.…”

Section: Steel Descriptionmentioning

confidence: 99%

High-temperature tensile constitutive data and models for structural steels in fire

Luecke¹,

Banovic²,

McColskey³

2015

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This report documents a model to represent the true stress-strain, σ − , behavior of structural steel. It is based on combination of data from the NIST World Trade Center collapse investigation and many other evaluated literature sources. Unlike other models for stress-strain behavior of structural steel, such as the Eurocode 3 formulation [1], the model explicitly describes the time-dependent nature of the strength of steel at high temperature. For untested steels, it predicts the stress-strain behavior using only the measured room-temperature yield strength, S y. The relative deviation between the model of this report and the actual data for the steels is generally less than 25 %, and is always less than 50 %. On subset of eight steels, the model predicts the stress-strain behavior slightly better than the equally complicated Eurocode 3 model. For three literature structural steels, not analyzed as part of the model, the model of this report and the Eurocode 3 model predict stress-strain behavior with similar quality.

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Section: Steel Descriptionmentioning

confidence: 99%

High-temperature tensile constitutive data and models for structural steels in fire

Luecke¹,

Banovic²,

McColskey³

2015

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Thermomechanics of Sliding Contact

Soom

Serpe

Dargush

2001

Fundamentals of Tribology and Bridging the Gap Between the Macro- And Micro/Nanoscales

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When relatively hard surfaces that make asperity contact slide against one another at speeds on the order of a mls or more very high local temperatures can be generated. If the sliding conditions are of sufficient severity and duration, thermal distortions at local or component levels can occur. Overall thermal deformations are primarily determined by thermal gradients. We have found that during the early parts of a sliding interval, all heat input is confined to small volumes at individual asperities which form "hot mounds" surrounded by much larger cool regions where there is little or no temperature change. Thermal distortions are essentially non-existent and overall component level interactions, including thermal softening, are not much different from isothermal. Eventually, more of the surface and near surface regions are heated and the possibility of component level thermal deformation increases.The modeling of such problems with reasonable fidelity using modern numerical approaches (e.g., finite or boundary element methods) remains a challenge. Asperity level up to component level analysis must be performed simultaneously. When the problem is isothermal, the macro level interactions can be handled by replacing the rough surface by a distributed contact compliance while retaining smooth surface geometry in the analyses. However, with thermomechanical problems, the assumption of smooth surfaces, however implemented, leads to thermomechanical deformations and macroscopic contact pressure distributions that are not found in practice.In this paper, we present some examples of these phenomena both via experimental observations, including shapes of wear tracks, and coupled thermomechanical finite element analyses of smooth and rough surface contacts. Neither view provides a complete picture of the interactions. We describe the current state of the art as we understand it and discuss approaches being taken to model the full problem.

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Low Manganese Steels For Nuclear Applications

Beeghly¹

1956

JOM

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Elevated-Temperature Properties of Carbon Steels

Cited by 9 publications

References 0 publications

High-temperature tensile constitutive data and models for structural steels in fire

High-temperature tensile constitutive data and models for structural steels in fire

Thermomechanics of Sliding Contact

Low Manganese Steels For Nuclear Applications

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