Assessment of mixed mode crack propagation of crane runway girders subjected to cyclic loading

Rettenmeier, Philipp; Roos, Eberhard; Weihe, Stefan; Schuler, Xaver

doi:10.1016/j.engfracmech.2015.12.018

Cited by 16 publications

(9 citation statements)

References 24 publications

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“…Notwithstanding, the aspect ratio evolution was found to be important. In literature, the aspect ratio is often assumed constant in fatigue crack propagation simulations (e.g., Rettenmeier et al 27 ). Figure 15 shows that this assumption would not have been valid for either of the studied details.…”

Section: Resultsmentioning

confidence: 99%

“…The choice of the initial crack depth

a_{0}

will have a major influence on the fatigue life estimation; recommendations that range from an initial crack size of 0.1 mm to 3 mm can be found in literature (e.g., Rettenmeier et al, 27 Hobbacher, 19 and Radaj et al 32 ). Radenkovic 33 used

a_{0}

values ranging from 0.01 to 0.03 mm.…”

Section: Methodsmentioning

confidence: 99%

“…The implemented fatigue crack growth model was a simplified model. A significantly more advanced LEFM-based fatigue crack propagation assessment case study was presented by Rettenmeier et al 26,27 They studied the initiation and propagation of cracks due to rolling contact fatigue at fillet weld roots of welds joining the crane rail to the top flange. The examined welds are subjected to highly nonproportional and mixed mode loading conditions.…”

Section: Numerical Fatigue Assessment Of Crane Runway Girdersmentioning

confidence: 99%

See 2 more Smart Citations

Fracture mechanics and hot spot stress‐based fatigue life calculation: Case study for a crane runway girder

Hectors

Chaudhuri

Waele

2022

Fatigue Fract Eng Mat Struct

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This work presents the case study of a welded overhead crane runway girder. A full-shell global finite element model was developed and validated using strain measurements. The global model drives solid submodels of different scales. Using load spectra based on real operational data, hot spot stress and XFEM-based fracture mechanics simulations are performed to assess the fatigue properties of two critical joints. For the fracture mechanics-based approach, it is shown that small cracks quickly converge to the same aspect ratio. Hence, the choice of the initial crack aspect ratio was found to be inconsequential. But the aspect ratio must not be assumed to be constant during the fatigue crack growth simulations. Finally, it is shown that the size at which a crack is transferred from one submodel to a subsequent is critical for the accuracy of the fatigue crack growth simulations.

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Section: Resultsmentioning

confidence: 99%

“…The choice of the initial crack depth

a_{0}

a_{0}

values ranging from 0.01 to 0.03 mm.…”

Section: Methodsmentioning

confidence: 99%

Section: Numerical Fatigue Assessment Of Crane Runway Girdersmentioning

confidence: 99%

See 1 more Smart Citation

Fracture mechanics and hot spot stress‐based fatigue life calculation: Case study for a crane runway girder

Hectors

Chaudhuri

Waele

2022

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…Qi et al [2] evaluated the safety and analysed the fatigue durability of crane construction. Rettenmeier et al [3] addressed the assessment of crack propagation in crane runway girders being travelled over by wheel loads, and in [4] addressed a fatigue evaluation procedure to assess the influence of multiaxial stress states caused by both traveling crane wheel loads and welding residual stresses on the lifetime of crane runway girders. Euler et al [5] dealt with the fatigue evaluation of crane rail welds using local concepts.…”

Section: Introductionmentioning

confidence: 99%

Experimental Assessment of Time-Limited Operation and Rectification of a Bridge Crane

et al. 2020

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This paper describes a problem related to a casting bridge crane with a combined load of 200/50/12.5 t and a span of 18.6 m, working in a heavy metallurgical operation. Due to the specific stress of the structure after its long-term operation, longitudinal fillet welds between the upper flange and the web of the main box beam on the rail side of the 200 t trolley were irreparably damaged. As a result, the cross-section of the main beam had opened, thereby substantially reducing its strength and stiffness. This resulted in a disproportionate increase and undesirable redistribution of stresses in the beam and, at the same time, an increase in the probability of acute fatigue or the loss of stability of the elastic beam shape. Therefore, the rectification of the damaged load-bearing structure was carried out by specific structural modifications. Critical load-bearing elements were subjected to complicated strength and fatigue life analyses before and after rectification. These analyses were supported by experimental measurements. The applied modifications resulted in a partial strengthening of the lifting device with the possibility of its further operation, but only in a limited mode, with a limited period of operation with a time limit of 2 years and a reduced total load capacity of 150 t. The applied methods are also applicable for the fatigue analysis of load-bearing elements and equipment for bridge, gantry and tower cranes, crane tracks, road and railway bridges and support structures under machinery and other devices with a dominant transverse and rotating effect.

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“…Kulka et al [16] identified a variety of factors, including vibrations, which cause damage to a crane's rail. According to Rettenmeier et al [17], when a moving load is subjected to rail vibration, rail cracks are propagated in crane rails, which results in a vicious circle of increased vibration and cracking.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Optimization Design of Cranes Based on Human–Crane–Rail System Dynamics and Annoyance Rate

Xin

2017

Shock and Vibration

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The operators of overhead traveling cranes experience discomfort as a result of the vibrations of crane structures. These vibrations are produced by defects in the rails on which the cranes move. To improve the comfort of operators, a nine-degree-of-freedom (nine-DOF) mathematical model of a “human–crane–rail” system was constructed. Based on the theoretical guidance provided in ISO 2631-1, an annoyance rate model was established, and quantization results were determined. A dynamic optimization design method for overhead traveling cranes is proposed. A particle swarm optimization (PSO) algorithm was used to optimize the crane structural design, with the structure parameters as the basic variables, the annoyance rate model as the objective function, and the acceleration amplitude and displacement amplitude of the crane as the constraint conditions. The proposed model and method were used to optimize the design of a double-girder 100 t–28.5 m casting crane, and the optimal parameters are obtained. The results show that optimization decreases the human annoyance rate from 28.3% to 9.8% and the root mean square of the weighted acceleration of human vibration from 0.59 m/s2to 0.38 m/s2. These results demonstrate the effectiveness and practical applicability of the models and method proposed in this paper.

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Assessment of mixed mode crack propagation of crane runway girders subjected to cyclic loading

Cited by 16 publications

References 24 publications

Fracture mechanics and hot spot stress‐based fatigue life calculation: Case study for a crane runway girder

Fracture mechanics and hot spot stress‐based fatigue life calculation: Case study for a crane runway girder

Experimental Assessment of Time-Limited Operation and Rectification of a Bridge Crane

Dynamic Optimization Design of Cranes Based on Human–Crane–Rail System Dynamics and Annoyance Rate

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