Study on Crack Branching Condition for Brittle Crack Propagation in Steels

Tonsho, Fumiaki; Kawabata, Tomoya; Aihara, Shuji

doi:10.1016/j.prostr.2017.11.041

Cited by 2 publications

(1 citation statement)

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“…As well as the existence of flexibility and efficiency in the methodology adopted because FEM and DBEM were complementary in this study. Similarly, Fumiaki [10] has examined the mechanism of crack branching and the effect of surface roughness in Nickel steels through experimentation and the use of the Finite Element Method. The author has concluded that stress triaxiality tends to increase through crack propagation and critical condition for crack branching is when the main stress exceeds 1500 MPa.…”

Section: Introductionmentioning

confidence: 99%

Computational modeling of fatigue crack propagation in butt welded joints subjected to axial load

2019

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This article addresses the study of crack behavior elicited on axial fatigue in specimens joined by butt weld made of steel ASTM A36 by using fracture mechanics and simulation software of finite elements (Ansys APDL, Franc3D). The computational model was initially to define the geometry model by using CAD software. Specimens with Weld Reinforcement of 2 mm and 3mm were simulated. Subsequently, the type of element for the mesh, the information inclusion concerning material mechanical properties and load conditions were selected. By using Franc3D software, the crack propagation phenomenon is analyzed, and its growth parameters have been established. In this way, it is possible to calculate the magnitude of stress intensity factor (SIF) along the crack front. It is concluded that the stress located in the weld toe is maximized proportionately to the size of the weld reinforcement due to the concentration effect of geometric stress. In addition, it is observed that the propagation rate obtained from Paris law has a similar behavior for the studied weld reinforcements; the latter as there were short cracks.

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Section: Introductionmentioning

confidence: 99%