Analysis of strain-life fatigue parameters and behaviour of different groups of metallic materials

Basan, Robert; Franulović, Marina; Prebil, Ivan; Črnjarić-Žic, Nelida

doi:10.1016/j.ijfatigue.2010.10.005

Cited by 34 publications

(15 citation statements)

References 13 publications

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“…AA6061-t651 has the highest σ′ f and b values, and lowest ε f ' and c values among other conditions. It can be concluded that the alloy with higher σ' and b has higher strength, whereas the alloy with higher ε' f and c has higher ductility (Basan, Franulovic, Prebil, & Crnjaric-Zic, 2011;Schweizer, Seifert, Nieweg, Hartrott, & Riedel, 2011). Also it can be seen there is no a large differences in most fatigue properties when compared the T651 with T4 conditions, but this difference become very clear as compared these two conditions (T651 and T4) with the O-condition.…”

Section: Resultsmentioning

confidence: 79%

Effect of Heat Treatment on Strain Life of Aluminum Alloy AA 6061

Abood

Saleh²,

Abdullah

2013

JMSR

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The present work encompasses the investigation of Low Cycle Fatigue (LCF) of aluminum alloy AA6061 in three conditions, annealing (O), T4 and T651. AA6061-O has the higher value of transition fatigue life (N T ) because it has the highest ductility, while the fatigue strength exponent and fatigue ductility exponent are within the range of metallic materials. The SEM morphology for specimens at strain closer to true tensile stress show multi-crack origins with secondary cracks and large final fracture zone. The striations are very clear for O-condition.

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Section: Resultsmentioning

confidence: 79%

Effect of Heat Treatment on Strain Life of Aluminum Alloy AA 6061

Abood

Saleh²,

Abdullah

2013

JMSR

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“…Hatscher et al [8] also mentioned the prospect of such division for estimation of fatigue C-M-B parameters. Results of detailed analysis performed on a large number of material data done by Basan et al [15] showed that there is statistically significant difference among individual C-M-B fatigue parameters as well as strain-life behavior (∆ε-2N f relationships) of unalloyed, low-alloy and high-alloy steels. Also, preliminary investigations on cyclic parameters in [16,17] showed that dividing steels by alloying content could result in more accurate estimations of cyclic parameters and hence, more accurate estimations of cyclic stress-strain curves of materials.…”

Section: Discussionmentioning

confidence: 99%

“…It was shown in [6,8,[15][16][17] that dividing steels in this manner contributes to improvement of estimations of steel behavior from monotonic properties of steels. Results of analysis performed in Section 4.1 confirmed that statistically significant differences exist between cyclic yield stress Re′ and cyclic parameters K′ and n′ of mentioned group of steels.…”

Section: Discussionmentioning

confidence: 99%

“…For this purpose, a large and independent set of material data was collected from relevant sources. Since previous investigations [15][16][17] confirmed that dividing steels into different subgroups might improve estimation accuracy, this will also be taken into consideration. One-way Analysis of Variance (one-way ANOVA) and post hoc Tukey's test will be performed in order to check whether individual steel groups are statistically different regarding their cyclic parameters R e , K and n .…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Methods for Estimation of Cyclic Stress-Strain Parameters from Monotonic Properties of Steels

Marohnić

Basan

Franulović

2017

Metals

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Abstract:Most existing methods for estimation of cyclic yield stress and cyclic Ramberg-Osgood stress-strain parameters of steels from their monotonic properties were developed on relatively modest number of material datasets and without considerations of the particularities of different steel subgroups formed according to their chemical composition (unalloyed, low-alloy, and high-alloy steels) or delivery, i.e., testing condition. Furthermore, some methods were evaluated using the same datasets that were used for their development. In this paper, a comprehensive statistical analysis and evaluation of existing estimation methods were performed using an independent set of experimental material data compriseding 116 steels. Results of performed statistical analyses reveal that statistically significant differences exist among unalloyed, low-alloy, and high-alloy steels regarding their cyclic yield stress and cyclic Ramberg-Osgood stress-strain parameters. Therefore, estimation methods were evaluated separately for mentioned steel subgroups in order to more precisely determine their applicability for the estimation of cyclic behavior of steels belonging to individual subgroups. Evaluations revealed that considering all steels as a single group results in averaging and that subgroups should be treated independently. Based on results of performed statistical analysis, guidelines are provided for identification and selection of suitable methods to be applied for the estimation of cyclic stress-strain parameters of steels.

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“…The values of the material parameters related to the Manson-Coffin curves, required for the application of the criterion, are reported in Ref. [11]. The effective Poisson ratio,  eff , is assumed to be equal to the elastic Poisson ratio (that is,   0.…”

Section: Criterion Validationmentioning

confidence: 99%

Joined application of a multiaxial critical plane criterion and a strain energy density criterion in low-cycle fatigue

Carpinteri¹,

Fortese²,

Ronchei³

et al. 2017

Frattura Ed Integrità Strutturale

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ABSTRACT. In the present paper, the multiaxial fatigue life assessment of notched structural components is performed by employing a strain-based multiaxial fatigue criterion. Such a criterion, depending on the critical plane concept, is extended by implementing the control volume concept reated to the Strain Energy Density (SED) approach: a material point located at a certain distance from the notch tip is assumed to be the verification point where to perform the above assessment. Such a distance, measured along the notch bisector, is a function of both the biaxiality ratio (defined as the ratio between the applied shear stress amplitude and the normal stress amplitude) and the control volume radii under Mode I and Mode III. Once the position of the verification point is determined, the fatigue lifetime is assessed through an equivalent strain amplitude, acting on the critical plane, together with a unique material reference curve (i.e. the Manson-Coffin curve). Some uniaxial and multiaxial fatigue data related to V-notched round bars made of titanium grade 5 alloy (Ti-6Al-4V) are examined to validate the present criterion.

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Analysis of strain-life fatigue parameters and behaviour of different groups of metallic materials

Cited by 34 publications

References 13 publications

Effect of Heat Treatment on Strain Life of Aluminum Alloy AA 6061

Effect of Heat Treatment on Strain Life of Aluminum Alloy AA 6061

Evaluation of Methods for Estimation of Cyclic Stress-Strain Parameters from Monotonic Properties of Steels

Joined application of a multiaxial critical plane criterion and a strain energy density criterion in low-cycle fatigue

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