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The retardation effect of static torsion on fatigue crack

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The retardation effect of static torsion on fatigue crack is extensively used in a variety of industries. The retardation effect of static torsion on fatigue crack is widely used in structural applications, including bridges, buildings and construction equipment and more.

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The retardation effect of static torsion on fatigue crack

Apr 12,2020 The retardation effect of static torsion on fatigue crack#0183;The mechanism of the retardation due to static torsion was discussed and supported by the microscope fractography analysis.An effective stress intensity factor expression was proposed based on the fractography analysis to estimate the fatigue crack growth under constant torque in the low torque condition.The effects of overloads in fatigue crack growthSeveral theories have been proposed to explain the transient fatigue crack growth decelerations and accelerations which follow overloads.The mechanisms that have been proposed to explain retardation after a tensile overload,for example,include residual stress,crack deflection,crack closure,strain hardening,and plasticThe effect of steady torsion on fatigue crack growth under In this study,fatigue crack growth on rotating bending axles and shafts with or without an applied steady torsion is presented.Fracture mechanics approaches are used to analyze the results based on Stress Intensity Factors developed for bending and torsion in shafts and show fatigue crack growth retardation when steady torsion is applied.

The effect of mode III loading on fatigue crack growth in

The effect of a steady torsion on fatigue crack growth under rotating bending is focused in this paper. The mechanism of the retardation due to static torsion was discussed and supported by The Effects of Carburization on the Fatigue Crack Growth Jun 03,2019 The retardation effect of static torsion on fatigue crack#0183;In this study,a series of fatigue tests were conducted on C45 steel specimens with local surface cracks.The effects of carburizing treatment with different case depths were discussed under cyclic tensile and torsional loading.Moreover,the surface crack extension paths and crack propagation rates were discussed.In addition,the effects of additional static torsion under cyclic tensile The Effects of Carburization on the Fatigue Crack Growth In this study,a series of fatigue tests were conducted on C45 steel specimens with local surface cracks.The effects of carburizing treatment with different case depths were discussed under cyclic tensile and torsional loading.Moreover,the surface crack extension paths and crack propagation rates were discussed.In addition,the effects of additional static torsion under cyclic tensile

Some results are removed in response to a notice of local law requirement.For more information,please see here.Previous123456NextSTOCHASTIC DAMAGE EVOLUTION UNDER STATIC AND

STOCHASTIC DAMAGE EVOLUTION UNDER STATIC AND FATIGUE LOADING IN COMPOSITES WITH MANUFACTURING DEFECTS A Dissertation by 3.2 The effect of shear stress on the fatigue performance of composite Figure 3.15 The schematic of the tension/torsion fatigueSEMIELLIPTICAL FATIGUE CRACK GROWTH UNDERAbstract An analysis of the influence of steady torsion loading on fatigue crack growth rates under rotating or reversed bending is presented.Mixedmode (I + III) tests were carried out on cylind

Polymer - CiteSeerX

tomer matrix.A torsion fatigue test protocol is adopted to assess the self-healing performance of two different elastomeric matrices.Signicant recovery of torsional stiffness occurs after approximately 5 h,the time required to achieve a measurable degree of cure of the healing agents.Total fatigue crackPolymer - CiteSeerXtomer matrix.A torsion fatigue test protocol is adopted to assess the self-healing performance of two different elastomeric matrices.Signicant recovery of torsional stiffness occurs after approximately 5 h,the time required to achieve a measurable degree of cure of the healing agents.Total fatigue crackMultiaxial Fatigue - publish.illinois.eduJun 05,2014 The retardation effect of static torsion on fatigue crack#0183;Multiaxial Fatigue The retardation effect of static torsion on fatigue crack#169; 2001-2011 Darrell Socie,University of Illinois at Urbana -Champaign,All Rights Reserved 1 of 125 Contact Information

Investigation of fatigue behavior of two austenitic

Fatigue of two stainless steels,AISI 304L and AL6-XN,was systematically investigated.While AISI 304L is well known in industry and has been used in engineering applications over the years,AL6-XN is a relatively new alloy and fatigue properties of this material have not been fully investigated by researchers.Both materials belong to one group of austenitic stainless steels.International Journal of Fatigue 0142-1123 ElsevierIJ Fatigue keywords The International Journal of Fatigue has traditionally contained author indexes and contents lists at the end of each year.Useful though these are,we believe that they would be enhanced by the addition of indexes compiled from keywords associated with each paper.Full-Scale Fatigue Testing of a Wind Turbine Blade in Oct 03,2017 The retardation effect of static torsion on fatigue crack#0183;In this regard,modal analysis,static and fatigue testing were performed on a 45.7 m blade for three states of the blade (i) as received blade (ii) when a crack of 200 mm was introduced between the web and the spar cap and (iii) when the crack was extended to 1000 mm.Calibration pull-tests for all three states of the blade were performed to

Fatigue crack orientation in NR and SBR under variable

fully reversed torsion tests were also conducted with static axial displacements to investigate the effects of static axial displacements on the fatigue behavior during torsion tests.Path D applied a tensile static displacement and path E applied a static compressive displacement.The variable amplitude load signals consisted of multi-Fatigue crack initiation direction under cyclic tension or Sep 29,2004 The retardation effect of static torsion on fatigue crack#0183;JOURNAL OF MATERIALS SCIENCE LETTERS 18 (1999) 1931 1932 Fatigue crack initiation direction under cyclic tension or torsion with superimposed biaxial static load YONG-HAK HUH,SEONG-JAI CHO Material Evaluation Center,Korea Research Institute of Science and Standards,Science Town,Taejon,305-600,Korea E-mail [email protected] JIN-YOUNG KIM Department ofFatigue Life Extension by Crack Repair Using Double Stop Drilling holes in the vicinity of the crack tip turns the crack into a notch and reduces the crack tip stress intensity factor.In this paper,a new idea is used in which instead of a single hole,two symmetric and interconnected holes are drilled at the crack tip.The main concept of double stop-hole method is to reduce the stress concentration at the edge of stop-holes in the cracked

Fatigue Crack Retardation of Low Carbon Steel in

Retardation cycles were smaller in 3 percent saltwater than in air.Since the overload affected zone size was not affected by saltwater,the decrease in retardation cycles was attributed to the higher rates of fatigue crack propagation in 3 percent saltwater.Thinner specimen showed stronger retardation thanFatigue Crack Retardation of Low Carbon Steel in K.Fatigue Crack Retardation of Low Carbon Steel in Saltwater The crack propagation behavior following the application of a single tensile overload in 3 percent saltwater was examined using a low carbon steel,which has a considerably lower static strength than high strength steel used in previous report.Fatigue Crack Growth of Silicon Nitride at 1400 The retardation effect of static torsion on fatigue crack#176;C Atime was systematically longer than the static one.Some direct fatigue crack growth measurements at elevated temperatures for a commercial A1,0,and an AI,O,-SiC composite also seem to support the same notion of fatigue retardation.28' No mecha- nistic explanation,to our knowledge,has been offered to ratio- nalize these observations.

Fatigue Crack Growth of Silicon Nitride at 1400 The retardation effect of static torsion on fatigue crack#176;C A

time was systematically longer than the static one.Some direct fatigue crack growth measurements at elevated temperatures for a commercial A1,0,and an AI,O,-SiC composite also seem to support the same notion of fatigue retardation.28' No mecha- nistic explanation,to our knowledge,has been offered to ratio- nalize these observations.Effects of crack size and crack face interference on shear Effects of crack size and crack face interference on shear fatigue crack growth in a bearing steel Fully-reversed cyclic torsion was combined with a static axial compressive stress to obtain a stable shear-mode crack growth in the longitudinal direction of cylindrical specimens. Effects of crack size and crack face interference on shear Effect of torsion angle on tension-torsion multiaxial The retardation effect of static torsion on fatigue crack growth in strip steel analysing the effect of static torsion on Mode I fatigue crack growth behaviour. the retardation due to

Effect of Strain Rate on the Fatigue and Static Crack

Mar 26,2017 The retardation effect of static torsion on fatigue crack#0183;A test was performed to understand the fatigue crack growth rate behavior under gentle cycling at two different values of K max in 3.5wt% NaCl/pH = 8.2 at -1050 mV SCE.The measured fatigue crack growth rate increased as the frequency was decreased from 1 mHz to 0.01 mHz.Effect of Large Hydrostatic Pressures on the Torsional Effect of Large Hydrostatic Pressures on the Torsional Fatigue Strength of two Steels Show all authors.D.J.Burns * A two-stage process of fatigue crack growth,Proc.Crack Propagation Symp.,Cranfield,1961,77 W.A.,Bendler,H.M.Effect of superimposed static tension on the fatigue process in copper subjected to Effect of Biaxial Static Loads on Fatigue Crack Fatigue crack propagation behavior under cyclic tensile or torsional loading with biaxial static loads has been investigated.Two different biaxial loading systems,i.e.cyclic tensile loading with static torsional load and cyclic torsional loading with static tensile load,were employed to thin-walled tubular specimens.The crack propagation was measured by two crack gages mounted near the

EFFECT OF BAND OVERLOAD ON FATIGUE CRACK

This is to certify that the project thesis entitled,Effect of Band Overload on Fatigue Crack Growth Retardation submitted by Kaustav Moni Saikia,Roll No.10503036,Mechanical Engineering,National Institute of Technology,Rourkela is an authentic work carriedDiscerning the Fatigue Crack Growth Behavior of API2.1 Fatigue Crack Growth Test The compact tension (CT) specimens were machined following to the general requirement of the ASTM E647.The geometry and actual machined specimen is illustrated in Fig.2.The specimen was pre-cracking up to crack length 2 mm to eliminate the effect of machined starter notch and provide a sharpened of crack tip.Discerning the Fatigue Crack Growth Behavior of API X65 2.1 Fatigue Crack Growth Test The compact tension (CT) specimens were machined following to the general requirement of the ASTM E647.The geometry and actual machined specimen is illustrated in Fig.2.The specimen was pre-cracking up to crack length 2 mm to eliminate the effect of machined starter notch and provide a sharpened of crack tip.

Despite the practical importance of polymodal fatigue,

with and without steady torsion.Results show that the static mode III Present study shows the effect of steady torsion (Mode III) on cylindrical specimens under reversed bending (Mode I) and compares leads to a significant fatigue crack growth retardation.So the crack growth rates decrease with increasing mode IIIDespite the practical importance of polymodal fatigue,Results show that the superimposed static mode III loading to a crack growing in cyclic mode I,leads to a significant fatigue crack growth retardation.So the crack growth rates decrease with increasing mode III load for cyclic mode I (AKj)+ static Mode III (Km) loading.The shape of the final crack was obtained after final fracture ofDTITORSIONAL FATIGUE TESTS AND DATA Torsional fatigue tests were performed on both materials for each surface condition as-machined,polished,and shot-peened.Each group was tested in torsional fatigue to failure at various levcls of twist moment,from 33 to 100 percent of the maximum static value.Three specimens were run at each value

Crack initiation and propagation in torsional fatigue of

This anomalous notch-strengthening effect was ascribed to the larger retardation of fatigue crack propagation by sliding contacts of fracture surfaces.The superposition of static tension on cyclic torsion causes notch weakening.The notch-strengthening effect in torsional fatigue was not found in carbon steels,SGV410.Crack growth mechanism in precracked torsional fatigue The mechanism of crack growth of precracked materials was investigated under cyclic torsion loading with and without axial static stress using 4340 steel.During the crack growth,branching of the crack was observed.The length of the crack between the firstCrack face interactions near-threshold fatigue crack The effect of a steady torsion on fatigue crack growth under rotating bending is focused in this paper. The mechanism of the retardation due to static torsion was discussed and supported by

Cited by 18Publish Year 2014Author K.TanakaFatigue crack growth under rotating bending loading on

The effect of steady torsion on fatigue crack growth rate due to rotating bending rate is verified.The conditions for the retardation effect is presented and explained.Differences between fatigue crack growth rate under rotating bending and standard specimens.Cited by 11Publish Year 2015Author M.da Fonte,L.Reis,M.de FreitasEffect of steady torsion on fatigue crack initiation and The retardation effect of static torsion on fatigue crack#0183;Fractographic observations lead to the conclusion that the retardation effect on fatigue crack growth,is due to a significant higher irregularity on fatigue crack path which is observed when steady torsion is applied to rotating bending,which also contributes to the closure effect.Cited by 11Publish Year 2015Author M.da Fonte,L.Reis,M.de Freitas(PDF) The effect of steady torsion on fatigue crack growth Results show that fatigue crack growth rate in rotating bending can decrease in the presence of a steady torsion and this retardation effect increases with the level of steady torsion,even though the Von Mises equivalent stress increases.

Author Yunchao Lu,Te Chen,Fengpeng Yang,Tian LanPublish Year 2020The retardation effect of static torsion on fatigue crack

This study is aimed at analysing the effect of static torsion on Mode I fatigue crack growth behaviour.Experiments have been conducted under constant torque or constant twist angle with different Author M.da Fonte,L.Reis and M.de FreitasCharacterisation of Crack Tip Fields 5 Fatigue Fracture Apr 29,2020 The retardation effect of static torsion on fatigue crack#0183;Influence of the constraint effect on the fatigue crack growth rate in S355 J2 steel using digital image correlation. Plastic CTOD as fatigue crack growth characterising parameter in 2024T3 and 7050T6 aluminium alloys using DIC The retardation effect of static torsion on fatigue crack growth in strip steel.Yunchao Lu; Te Chen AN EFFECT OF SHOT PEENING ON GROWTH ANDRetardation of crack growth was significant particularly with cracks shorter than 2 mm.For the specific stress amplitude,evaluated results enable to estimate threshold length of defects,which after the application of shot peening will be reliably arrested.Keywords Shot peening,fatigue crack growth,fatigue life,aircraft Al-alloy.1.

A Review on Fatigue Life Prediction Methods for Metals

A few models explaining the macrocrack growth retardation effect under variable A probabilistic treatment of microstructural effects on fatigue crack growth of large cracks A new criterion of fatigue strength of a round bar subjected to combined static and repeated bending and torsion, Fatigue 12345NextExperimental Study on the Fatigue Crack Growth and cause to crack retardation.The theory based on residual stress was introduced to describe the retardation effect,and the plastic zone size of crack tip was calculated by the Dugdale model.The Wheeler model was successfully used to t the decreased crack growth rate.Keywords fatigue crack growth,fracture surface,overload,1 (20) Fatigue crack propagationSolid Mechanics Fatigue crack propagation Anders Ekberg 2 (20) Stress intensity factors and fracture In static loading,the stress intensity factor for a small crack in a large specimen can be expressed as Kf aI =(,) where f depends on geometry If the stress is kept constant,we will get fracture for a certain crack length,a=aC,which will give KI=KIC.

(PDF) Load path effect on fatigue crack propagation in I+

applied on a specimen that is subjected to a static mode I and mode 110 F.Fremy et al./ International Journal of Fatigue 62 (2014) 104112 Table 6 Twist angle (b) through the thickness of the specimen (5 mm) and tilt angle (a) after the crack has propagated in mixed mode by Da = 2 mm.Effect of the load path on the crack path,after the (PDF) Fatigue retardation studies in mild steelThe effect of carbon fiber patches on fatigue crack propagation in mild steel has been studied using ACPD technique on C.T.S.specimens.The investigation has been also included the effect of

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