Stress intensity factors under combined bending and torsion moments

Ismail, Al Emran; Ariffin, Ahmad Kamal; Abdullah, Shahrum; Ghazali, Mariyam Jameelah; Abdulrazzaq, M.; Daud, Ruslizam

doi:10.1631/jzus.a1100040

Cited by 20 publications

(14 citation statements)

References 23 publications

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“…where, F I,b is the geometrical correction factor are obtained from [5][6][7], M is the bending moment, D is the diameter of bar and a is the crack length or crack depth. Due to the uncertainties of mechanical, geometrical and loading properties, a Monte Carlo Simulation (MCS) is used in the probabilistic analysis to determine the probability of failure.…”

Section: K-estimation Methodsmentioning

confidence: 99%

Probabilistic analysis of surface crack in round bars under bending moments

Ismail

2012

2012 IEEE Colloquium on Humanities, Science and Engineering (CHUSER)

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Abstract-This paper presents the probabilistic analysis of surface crack in round bars subjected to bending moment using Monte Carlo simulation (MCS). A probabilistic model based on an elastic finite element analysis (FEA) was developed to evaluate the failure probability obtained using a K-estimation method. This method is based on the stress intensity factor (SIF) where the failure occurred when the SIF was assumed to exceed the critical SIF. It was found that, the K-estimation method was adequate to evaluate the failure probability of the bars when compared with the results obtained using the probabilistic FEA approach. The advantage of K-estimation methods was the reduction of the computational time and cost significantly.

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Section: K-estimation Methodsmentioning

confidence: 99%

Probabilistic analysis of surface crack in round bars under bending moments

Ismail

2012

2012 IEEE Colloquium on Humanities, Science and Engineering (CHUSER)

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“…which are plotted against x/h for n = 5 and 10 as in Fig. 10 and 11 (Ismail et al, 2011b(Ismail et al, , 2012b. Figure 10 shows the overall effect of h III /F 2 II-III against x/h when a/D is increased.…”

Section: Ii-iiimentioning

confidence: 98%

“…According to literature survey (Fonte and Freitas, 1997;Shahani and Habibi, 2007;Ismail et al, 2012b), mode III SIFs has already been published previously. Jintegral solution for mode I can be found in (Toribio et al, 2009) for surface crack in a plate.…”

Section: Introductionmentioning

confidence: 99%

J-Integral Evaluation of Surface Cracks in Round Bar under Mode III Loadings

Ismail¹,

Ariffin²,

Abdullah³

et al. 2014

RJASET

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Fracture mechanics approach has successfully used to characterize the existing cracks in engineering materials and structures. Tremendous number of publications on surface cracks can be found for crack behaviour which was assumed to behave linear elastic. However, lack of information on elastic-plastic crack behaviour or Jintegral was demanded especially for 3D surface cracks. In this present study, semi-elliptical surface cracks embedded in a solid round bar subjected to mode III loadings are considered. Then, J-integral or h-function and limit load were determined and analyzed. In order to predict J-integral along the crack front, a mathematical model was then developed. It is found that the developed model capable to predict J-integral well. However, the predictions breakdown occurred when the elastic dominated region of cracks.

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“…Recently, in ANSYS version 16.0 and above the determination of SIFs using J-integral approach can be separated into different mode of failure. This can be realized using interaction integral approach [17] and other can be found in [18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

An Overview of Fracture Mechanics with ANSYS

Ismail

Jamian²,

Kamarudin³

et al. 2018

IJIE

Self Cite

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This paper reviewed the use of ANSYS finite element program in analyzing the engineering structures containing defects or cracks. It is provided a fracture mechanics module which is capable to model the crack tip efficiently. In studying the cracks in elastic medium, linear elastic fracture mechanics (LEFM) is used where the crack-driving force called stress intensity factor, J-integral, energy release rate is provided as indicators of failure. There are three approaches can be used to calculate the stress intensity factors (SIF) such as Displacement Extrapolation Method (DEM) and Interaction Integral Method (IIM). Energy Release Rate (ERR) is calculated using Virtual Crack Closure Technique (VCCT) then it is converted to SIF. Based on the comparison, it is found that DEM, VCCT and J-integral techniques produced the SIFs are almost closed to the results obtained from open literature. However, IIM method lead to under estimate the SIFs.

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Stress intensity factors under combined bending and torsion moments

Cited by 20 publications

References 23 publications

Probabilistic analysis of surface crack in round bars under bending moments

Probabilistic analysis of surface crack in round bars under bending moments

J-Integral Evaluation of Surface Cracks in Round Bar under Mode III Loadings

An Overview of Fracture Mechanics with ANSYS

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