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Fatigue failure is often happened in a structure. It is usually initiated by a small fatigue crack which can grow during normal service and can lead to a catasthropic accident if it is not repaired properly. In analyzing a structure that has cracks, Fracture Mechanics approach with stress intensity...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/17682 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Fatigue failure is often happened in a structure. It is usually initiated by a small fatigue crack which can grow during normal service and can lead to a catasthropic accident if it is not repaired properly. In analyzing a structure that has cracks, Fracture Mechanics approach with stress intensity factor (K) as its main parameter is used. The value of K depends upon the crack length, far field <br />
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stress and the geometry of the structure. In this research, a full 3-D numerical analysis of mixed mode case four point bending edge slant through crack was conducted. The structure was modelled using brick element, and the stress <br />
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intensity factor was calculated using J-Integral. As the validation of the result using J-Intregal, seven case studys have been done. The results shows that the SIF <br />
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near the surface is different to the value at the middle of the plate. The biggest value of SIF for mode I is in the middle of thickness. Plane stress condition happen to the area near the surface and gradually become plane strain lead to the middle of thickness The results also shows that the slant angle give significant effect to the value of the SIF. When the angles become larger the results of βI becomes lower and βIII becomes higher. |
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