Berechnung der Dauerschwingfestigkeit bei mehrachsiger Beanspruchung — Teil 1

Liu, J.; Zenner, Harald

doi:10.1002/mawe.19930240706

Cited by 46 publications

(40 citation statements)

References 6 publications

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“…Experimental results collected by Liu and Zenner [7,11], used also by Papadopoulos [1], are used to validate the fatigue limit results predicted by the proposed approach. The experiments are based on synchronous sinusoidal out-ofphase bending and torsion.…”

Section: Numerical Resultsmentioning

confidence: 99%

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A Unified Numerical Approach for Multiaxial Fatigue Limit Evaluation

Li¹,

Santos²,

Freitas³

2000

Mechanics of Structures and Machines

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A unified numerical approach to evaluate the endurance limit for general multiaxial fatigue loading, under proportional or nonproportional loading, is presented. A minimum circumscribed ellipsoid approach is proposed for computing the amplitude and mean value of the equivalent shear stress, and an efficient numerical algorithm is developed for solving the min-max problem by using a constrained optimization method. The approach is general and efficient, especially suitable for computer-aided design and optimization. With this approach, nonproportional loading effects can be taken into account, overcoming limitations of many other multiaxial fatigue criteria. Experimental results collected from the literature are compared with results predicted by the numerical approach proposed in this paper. The comparison shows that the predictions agree well with experiments for both proportional and nonproportional loading situations.

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Section: Numerical Resultsmentioning

confidence: 99%

“…Brown and Miller [4] and Finley-Matake [5] proposed fatigue criteria based on the critical plane approach. Grubisic and Simburger [6] and Liu and Zenner [7] proposed fatigue criteria based on stress averages within an elementary volume. Dang Van et al.…”

mentioning

confidence: 99%

A Unified Numerical Approach for Multiaxial Fatigue Limit Evaluation

Li¹,

Santos²,

Freitas³

2000

Mechanics of Structures and Machines

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“…In the 1970s and 1980s, large campaigns of multiaxial fatigue were conducted in Germany [15][16][17][18][19], which lead to the conclusion of the influence of mean torsional stresses. In consequence, several methods were proposed, including this effect, such as those of Grubisic-Simbürger [37] and Liu-Zenner [38] amongst others. Modern design rules, such as the FKM Guideline [39,40], include the effect of mean shear stresses in torsional fatigue.…”

Section: Introductionmentioning

confidence: 99%

Influence of mean shear stress on the torsional fatigue behaviour of 34CrNiMo6 steel

Pallarés-Santasmartas

Albizuri

Avilés

et al. 2018

International Journal of Fatigue

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Keywords:Torsional fatigue Mean stress effect Haigh diagram Multiaxial fatigue criteria A B S T R A C TThis study provides a theoretical and experimental investigation of the effect of static shear stresses on the highcycle fatigue behaviour of a 34CrNiMo6 high-strength steel under quenched and tempered conditions. Torsion S-N curves under different mean shear stresses were obtained. Experimental results show that an increase in mean shear stress yields a gradual reduction in shear-stress amplitude that the material can withstand without failure. The results for this steel agree well with the Smith's hypothesis for ductile steels, which states that the effect of the torsional mean stresses on the torsional fatigue limit is negligible as long as the maximum shear stress is within the torsional yield strength. Taking into account the results collected from the literature and the experimental results on torsional fatigue of 34CrNiMo6 steel, an extension of the theory of Crossland is proposed to include the mean-shear-stress effect. Its application to the torsional fatigue case with mean shear stresses can be interpreted in terms of a balance of the energy of distortion. Macro-analyses of the specimen fracture appearance were conducted to obtain the fracture characteristics for different mean-shear-stress values under torsion fatigue loading.

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“…The application of the model according to Gough and Pollard illustrates a good accordance to the test results. Moreover, the method demonstrates its applicability for numerous test results incorporating steel, cast iron and aluminium specimens in [6]. …”

Section: Proportional Loadingmentioning

confidence: 97%

Multiaxial fatigue assessment of crankshafts by local stress and critical plane approach

Leitner¹,

Grün²,

Tuncali³

et al. 2016

Frattura Ed Integrità Strutturale

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ABSTRACT. For multiaxially-loaded parts several stress-based fatigue assessment concepts are applicable mostly taking uniaxial test results as basis. These approaches work well in case of proportional loading states, but on contrary, for non-proportional stress conditions, implying a change of the principal stress direction, deviations in the fatigue life estimation may occur. The aim of this study is to evaluate the cyclic multiaxial material behavior experimentally and to proof the applicability of stress-based methods to assess the fatigue strength. The investigated base materials incorporate the commonly applied crankshaft steels 50CrMo4 and 34CrNiMo6 without surface-layer post-treatments. Extensive fatigue tests with small-scale specimens are performed to evaluate the material behavior under cyclic loading. The experiments include basic uniaxial characterizations, such as notch stress sensitivity and effect of loading type, including tests under tension, rotating bending, and torsion loading. Additionally, combined loading tests with proportional and non-proportional situations are presented to reveal the fatigue resistance for multiaxial stress states. Significant loading conditions, such as proportional stress under rotating bending and torsion, and further on, non-proportional effects like phase shifts and varying frequency ratios are presented. The local fatigue strength assessment is performed on the basis of the critical plane approach, whereat the normal and shear stresses are transformed in numerous cutting planes. Equivalent stress hypotheses are applied and compared with the Citation: Leitner, M., Grün, F., Tuncali, Z., Steiner, R., Chen, W., Multiaxial fatigue assessment of crankshafts by local stress and critical plane approach, Frattura ed Integrità Strutturale, 38 (2016) M. Leitner et alii, Frattura ed Integrità Strutturale, 38 (2016) [47][48][49][50][51][52][53] 48 experiments showing that the Huber-Mises-Hencky criterion fits well to the test results in case of proportional rotating bending and torsion loading.

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Berechnung der Dauerschwingfestigkeit bei mehrachsiger Beanspruchung — Teil 1

Cited by 46 publications

References 6 publications

A Unified Numerical Approach for Multiaxial Fatigue Limit Evaluation

A Unified Numerical Approach for Multiaxial Fatigue Limit Evaluation

Influence of mean shear stress on the torsional fatigue behaviour of 34CrNiMo6 steel

Multiaxial fatigue assessment of crankshafts by local stress and critical plane approach

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