Stress Concentration Effects on Industrial Components

Viau, G.; Ortega, R.; Boccanera, L.; Pasquali, Emanuela; Sbuttoni, H.

doi:10.1007/s11668-010-9380-5

Cited by 6 publications

(3 citation statements)

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“…(2) Structure stress concentration: Change in the section size or configuration on stressed components modify the load lines in predictable manners [2]. Frequently, machine components have surface discontinuous, which act as stress concentrators during service life.…”

Section: Failure Causes Analysismentioning

confidence: 99%

“…Stress raisers have a great effect on crack initiation because of their effect on increasing the local stress or a decrease in the load-carrying capacity of the material [3], making it more susceptible to fatigue. From the configuration of pipe, the connection location between the pipe end and the casing-pipe is a transition step, which just became a stress concentrator and this is the most vulnerable site for fatigue initiation [2]. And the stress concentration created by the configuration was further aggravated by local positioned spot-welding at this location.…”

Section: Failure Causes Analysismentioning

confidence: 99%

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Fracture Failure of Oil-Pipes of Truck Diesel Engine Boost Compensator

Zhang

2015

J Fail. Anal. and Preven.

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Two fractured oil-pipes of truck diesel engine boost compensators were received for failure analysis. Fracture occurred at the connection location of the pipe end with its casing-pipe wherein the positioned spot-welding was conducted. Fatigue fracture is the main failure mode of the two pipes. The chemical composition and the microstructure and the tensile properties of pipe materials are in accordance with the specification. However, the wider spacing of fatigue striations on the fracture surfaces and the shorter service life of pipes indicate that the ultimate strength of the specified material does not meet practical operating load with greater stress amplitude. The fatigue cracks initiated because of stress concentrations resulting from the combined effect of geometry configuration and high stiffness by the positioned spot-welding at the connection location of the pipe end and its casing-pipe.

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Section: Failure Causes Analysismentioning

confidence: 99%

Section: Failure Causes Analysismentioning

confidence: 99%

Fracture Failure of Oil-Pipes of Truck Diesel Engine Boost Compensator

Zhang

2015

J Fail. Anal. and Preven.

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“…So it is important to assess impact from concrete shrinkage and to suppose possible areas of stress concentration. A concentration area develops in places where cross-section of structure changes, i. e. decrease (Viau 2010). Therefore, it is important to know these weak points and to solve the problem as per technological and structural aspect reducing the impact of stresses upon solidity of structure.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Stress Concentration Area about the Brace of the Concrete Wall at Early Age

Žiliukas

Žiogas

2012

Journal of Sustainable Architecture and Civil Engineering

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Scientists recently focus on concrete's hardening early age and its influence to solidity of a structure. Because of complex physical-chemical processes and developed strains, stresses appear in concrete and after they exceed tensile strength of concrete-develops cracks. In practice it is noted that a structure often cracks prior to commencement of exploitation. Therefore this article analyzes the influence of stresses caused by autogenous shrinkage over solidity of structure. The importance of stresses caused by concrete shrinkage significantly increases in places where a cross-section shifts. The stress concentration area develops at these points. One of the stress concentration areas is around the formwork's transverse brace and stresses due to autogeneous shrinkage are solved. To define stresses, analytical and finite element methods are used. The stresses concentration area is calculated more precisely using the finite elements method, the results obtained are exhaustive and it allows to get a clearer picture of stresses.

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