Mathematical model of edge crack development at bending thin-walled Z-shaped profile
Journal Title: Вісник Тернопільського національного технічного університету - Year 2017, Vol 85, Issue 1
Abstract
We consider engineering methods for determining stress intensity factors for defective items open structure bending. Characteristic under development boundary cracks Z-shaped profile. The mathematical model and removed depending to calculate stress intensity factors for the two methods by nominal stress in the net section and by changing the axial cross-sectional moment of inertia Z-shaped profile. Investigated subcritical crack growth boundary, defined stress singularity in the vicinity of fatigue crack – stress intensity factors of the first kind, including models V.V. Panasyuk for pure tensile and bend. Analytical determined correction functions which account for changing the geometry of thin-walled structures with widespread fatigue crack on which the recorded intensity ratios for thin-walled profile elements who perceive tensile strain and pure bending. Graphs correction functions, having their approximation obtained generalized correction function Z-shaped profile 200х87х6 mm dimensions, which simplifies the calculation of residual life of structural elements of the system.
Authors and Affiliations
Taras Dovbush, Mykola Stashkiv, Nadiya Khomyk, Natalia Rubinets
Keywords
Related Articles
- EP ID EP257686
- DOI -
- Views 56
- Downloads 0
Experimental study of pseudoelastic NiTi alloy under cyclic loading
The phase transformation temperatures of pseudoelastic NiTi alloy were defined by differential scanning calorimetry. The effect of the stress range on the functional properties of the NiTi alloy under uniaxial tension in...
Experimental study of contact spot welding of the agricultural machines parts
In the article the results of experimental studies of contact spot welding process of the agricultural machines parts are presented. The subject of experimental studies was selected the compression force of electrodes, w...
Mathematical modeling of led radiation in the system of medical diagnostics
The use in the medical diagnosis light irritation with intensity lower than standard level leads to decreasing invasiveness and increasing resolution of bioobject response. This improves the quality of diagnosis the stat...
Research of heat and salt transfer effect on filtration rate in soil dam (space problem)
Mathematical model of filtration in the body of the soil dam in three-dimensional case of the effect on filtration rate, temperature and concentration of chemicals in a porous medium has been built. In the law of filtrat...
Investigation of influence of the metal corrugated pipe diameter on its stress-strain state
Metal corrugated structures require both high design quality and quality of construction. Significant contribution to the damage initiation and the MCS fracture can be caused by the imperfect methods of calculating MCS i...