Low-cycle fatigue performance of solid cylindrical steel components subjected to torsion at very large strains

2017-02-01
Milani, Ali Salem
Dicleli, Murat
In this research, low-cycle fatigue performance of cylindrical specimens produced from different ductile steel grades subjected to torsion is investigated. The primary motivation behind this research is the need for data on low-cycle fatigue in solid cylindrical specimens of 5355 structural steel to use in a new steel Multi-Directional Torsional Hysteretic Damper (MTHD). This steel damper is intended to be used for seismic protection of buildings and bridges. In the newly developed steel damper the energy dissipaters are in the shape of a cylinder with enlarged ends and can undergo cyclic shear strain as large as 13%. Such.large strains are not encountered under service conditions in structural or mechanical components but are common in earthquake engineering in those components which are designed to plasticize and dissipate energy, e.g., plastic hinge regions, and in the case of the specific application presented in this paper, in the energy dissipaters of the steel damper. A total of 61 solid cylindrical specimens made of S355J2 +AR and C45E steel grades are tested using a special test setup capable of twisting the specimens up to +/- 50 degrees. The steel specimens are tested under different levels of torsional shear strain ranging between 0:044 and 0.130 and the data is used to calibrate the Coffin-Manson model for low cycle fatigue life prediction of specimens. Also, the impact of various other relevant factors on low-cycle fatigue behavior of specimens are looked into, including loading pattern and sequence, low temperature, surface finishing and aspect ratio (height/diameter).
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH

Suggestions

Non-destructive evaluation of residual stresses in the multi-pass steel weldments
Erian, Gökhan; Gür, Cemil Hakan; Batıgün, Caner; Department of Metallurgical and Materials Engineering (2012)
The purpose of this thesis is non-destructive determination of residual stress state in the multi-pass welded steel plates by Magnetic Barkhausen Noise (MBN) technique. To control the effectiveness of the developed procedure, continuous MBN measurements on the heat affected zone and parent metal of the welded plates were performed. In the experimental part, various steel plates were welded with different number of weld passes. Various series of samples were prepared for residual stress and for angular defle...
Effects of SiC particulates on the fatigue behaviour of an Al-alloy matrix composite
Kaynak, Cevdet (2006-01-01)
In this study, the fatigue behaviour of aluminium matrix-silicon carbide (SiC) particulate reinforced composite specimens was investigated in comparison to the matrix aluminium alloy containing 12 wt% Si. Three different weight percentages of SiC particulates: 5, 10, and 15 in the size range of 40-60 gm were injected into the melt. Mg was also added to improve the wettability of Al-alloy matrix over SiC particulates resulting in better interfacial bonding. Test specimens were machined from squeeze casting b...
The effect of double austenitization on the microstructure and toughness of AISI M2 high speed steel
Ögel, Bilgehan (1998-06-01)
In this study, the effect of double austenitization on microstructure and toughness of AISI M2 high speed steel was investigated. For double austenitization treatment, the specimens, which are hardened initially at 1220 degrees C and quenched in air, were hardened for a second time in the temperature range 1150 - 1050 degrees C. For comparison purposes, another set of specimens is austenitized singly in the temperature range 1150 - 1050 degrees C. Tempering process was carried out between 500 - 640 degrees ...
Low-velocity impact damage in glass fibre epoxy cylindrical tubes
Doyum, Ahmet Bülent; Altay, B (1997-10-01)
Types and characteristics of defects produced by low-velocity transverse impact loading on (+/-45 degrees(2), 90 degrees) S-glass and (+/-54 degrees(3), 90 degrees) E-glass fibre reinforced epoxy composites were investigated in this study. For both materials, the specimens were in the form of thin-walled cylindrical tubes. A test set-up capable of producing low-velocity transverse impact at energy levels between 3.5 J and 8.5 J was designed and manufactured. Fifteen specimens were tested from each type of c...
Strong strain path dependence of strain localizations and fracture in magnesium AZ31 sheet
Alkan, Kıvanç; Aytuna, O. Berk; Güler, Baran; Efe, Mert (Elsevier BV, 2020-6)
This study compares the deformation and fracture behavior of a basal-textured Mg AZ31 alloy sheet under uniaxial tension and biaxial stretching by using an in-plane biaxial test setup capable of observing and measuring the deformation at both meso (millimeter) and microstructure scales. Strain distributions at the mesoscale and accompanying fracture surfaces indicate a significant dependence on strain path. At the microscale, limited slip activity in biaxial case promotes contraction twins, where severe str...
Citation Formats
A. S. Milani and M. Dicleli, “Low-cycle fatigue performance of solid cylindrical steel components subjected to torsion at very large strains,” JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, pp. 12–27, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37838.