A model for predicting crack initiation in forged M3:2 tool steel under high cycle fatigue

Giang, N.A.; Özden, Utku Ahmet; Bezold, Alexander; Broeckmann, Christoph

doi:10.1007/s10704-013-9927-z

Cited by 4 publications

(9 citation statements)

References 47 publications

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“…The uniqueness of presented multistage model is the inclusion of physical process of fatigue damage evolution that establishes a relationship between the microscopic and macroscopic processes parameters under the total strain conditions. The initiation/nucleation life in composite materials is miniscule; however, the short crack growth life is significant …”

Section: Discussionmentioning

confidence: 99%

“…The fatigue degradation process must include all the stages of crack growth (Equation ). In modelling, it is safe to assume that the crack initiates during the decohesion at the interface of matrix and reinforcement and it propagates from the microscopic initial crack‐tip root; thus, the fatigue life is evaluated on the basis of all the 4 stages of damage evolution of microstructural elements within the fatigue damage zone (FDZ) …”

Section: Fatigue Crack Growth Life Prediction Modelmentioning

confidence: 99%

“…Xue et al developed microstructural‐based multistage fatigue life prediction model for aluminium alloy. Giang et al proposed multistage analytical model for predicting the fatigue life of forged M3:2 tool steel under HCF conditions. McCullough et al proposed the microstructural sensitive multistage fatigue model for aluminium‐based DRMMCs.…”

Section: Introductionmentioning

confidence: 99%

“…The microstructural parameters of DRMMCs, such as shape and size of the reinforcement, volume fraction, constraint of the reinforcement in the matrix material, and bonding strength between reinforcement and matrix, play a vital role in the evaluation of fatigue crack growth life under the LCF condition. 4,6,7,14,20,22,24,32,33 There are different models for evaluating the fatigue crack growth lives of DRMMCs. 4,12,28,[34][35][36][37][38][39][40][41] Zhang and Chen 12 developed a microstructural-based crack initiation model using the concept of Gibb free energy in which the reinforcement size and the yield strength are related to the fatigue life of particulated reinforced MMCs.…”

mentioning

confidence: 99%

“…Tevatia and Srivastava 35,36 proposed another fatigue crack growth life prediction model on the basis of the modified shear lag theory (model I), 35 including the effect of residual thermal stresses (model II). 36 In the present work, a closed form expression based on the multistage fatigue crack growth (MSFCG) 11,[13][14][15][42][43][44] life is obtained for estimating the total fatigue crack growth life of DRMMCs. It has been reported that FIGURE 1 A, Schematic showing different paths of the crack initiation in discontinuous reinforced metal matrix composites with cyclic plastic zone (CPZ) and fatigue damage zone (FDZ) at the root of the crack initiation.…”

mentioning

confidence: 99%

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The energy‐based multistage fatigue crack growth life prediction model for DRMMCs

Tevatia

Srivastava

2018

Fatigue Fract Eng Mat Struct

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A complex closed form expression for the multistage fatigue crack growth life has been developed to predict the fatigue life of discontinuous reinforced metal matrix composites. The multistage fatigue crack growth model includes the microstructural features of composite such as aspect ratio, volume fraction of reinforcement, constraint of fibre in the matrix, and interfacial bonding strength. It characterizes the fatigue damage evolution in various stages of crack nucleation/initiation and the growth of crack culminating in failure. A fatigue crack initiation model is presented, using energy balance equation, considering the nucleation process of phase transformation. The short crack growth life is estimated using the dependency of cyclic crack‐tip opening displacement that is directly correlated with the fatigue crack growth rate whereas the long crack growth life is evaluated using Li and Ellyin model. The sensitivity analysis of crack initiation model is performed to provide in‐depth knowledge on the mechanistic aspect. The sensitivity analysis shows that the little variation in the parameters “cyclic strain hardening exponent” (n′), “cyclic strength coefficient” (K′), and short crack length (asc) significantly affects the total fatigue crack growth life. It is observed that reinforcement increases the cyclic plastic deformation level and cyclic plastic zone size near the crack tip, under the total strain‐controlled conditions. The effect of total fatigue crack growth life is found to be significant in low cycle fatigue applications.

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Section: Discussionmentioning

confidence: 99%

Section: Fatigue Crack Growth Life Prediction Modelmentioning

confidence: 99%