Dynamic and Quasi-Static Tensile Properties of Structural S400 Steel

Authors

  • G. H. Farrahi School of Mechanical Engineering, Sharif University of Technology
Abstract:

The study of mechanical behavior of the structural steel S400 under quasi- static and dynamic loading has been the subject of this investigation. In oder to obtain different stress - triaxiality conditions the specimens were notched with 1, 1.5, 2 and 3.5 mm notch radius. The results of fractography show as the velocity of tension increases, ductility reduces and a ductile-brittle transition occurs under certain stress triaxiality or strain rates. The observation of load-time history diagrams and SEM micrographs show that, as far as the fracture is ductile, any increase in velocity leads to the reduction of fracture load which is presumed to be due to reduction of plastic deformation. In brittle fracture, however, the velocity increase results in increase in fracture load which is thought to be due to micro-cracks formed at different level near to the fracture surface of specimens, the so called crack shielding and crack branching at high deformation velocities. Notch radius also proved to be highly effective on fracture mechanism which is due to notch strengthening. The change in grain size of some of the specimens shows that the ductile to brittle transition in fracture mechanism can be postponed by a suitable heat-treatment scheme up to a certain strain rate.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

static versus dynamic assessment of l2 learners’ reading ability

dynamic assessment according to vygotskys sociocultural theory, states that instruction and assessment are interrelated. using static forms of assessment with second and foreign language students could do more harm than good. many teachers neglect to take account of the complexity involved in learning a second or foreign language and often wonder why learning of a language take so long. thi...

Nanostructured Al–Fe alloys produced by e-beam deposition: static and dynamic tensile properties

Three different aluminum–iron alloys were produced by electron-beam deposition with the iron content in the range 1.15–1.71 at.%. These alloys did not contain any identifiable iron-bearing particles, and exhibited full density with high-angle grain boundaries in the micrometer range, and a sub-grain size typically smaller than 100 nm. The tensile deformation characteristics of the alloys were e...

full text

Strain Rate Effect on Tensile Behavior for a High Specific Strength Steel: From Quasi-Static to Intermediate Strain Rates

The strain rate effect on the tensile behaviors of a high specific strength steel (HSSS) with dual-phase microstructure has been investigated. The yield strength, the ultimate strength and the tensile toughness were all observed to increase with increasing strain rates at the range of 0.0006 to 56/s, rendering this HSSS as an excellent candidate for an energy absorber in the automobile industry...

full text

some properties of fuzzy hilbert spaces and norm of operators

in this thesis, at first we investigate the bounded inverse theorem on fuzzy normed linear spaces and study the set of all compact operators on these spaces. then we introduce the notions of fuzzy boundedness and investigate a new norm operators and the relationship between continuity and boundedness. and, we show that the space of all fuzzy bounded operators is complete. finally, we define...

15 صفحه اول

Static and dynamic nonlinear analysis of steel frame with semi-rigid connections

One of the important issues in the study of steel frames is to find a suitable formulation for semi-rigid connections. In this paper, the explicit stiffness matrix for a two-dimensional beam-column element having end-flexibilities is derived. The effects of the lateral uniformly distributed load on the deflection are considered. Both tensile and compressive axial loads are also taken into accou...

full text

Investigating The Seismic Response of Structural Walls Using Nonlinear Static and Incremental Dynamic Analyses

Structural walls commonly used as efficient structural elements to resist lateral and vertical loads. Diverse performance of bearing wall system in past earthquakes, motivates investigation on the adequacy of current seismic design provision for these walls. This study considers seismic performance of model walls of bearing wall and building frame systems designed as ordinary and special struct...

full text

My Resources

Save resource for easier access later

Save to my library Already added to my library

{@ msg_add @}


Journal title

volume 13  issue 1

pages  51- 60

publication date 2000-02-01

By following a journal you will be notified via email when a new issue of this journal is published.

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023