Boundary Element Analysis of Fatigue Crack Propagation in Stiffened Panels

1998 ◽  
Vol 35 (1) ◽  
pp. 122-130 ◽  
Author(s):  
N. K. Salgado ◽  
M. H. Aliabadi
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Boundary Element ◽  
Fatigue Crack Propagation ◽  
Element Analysis ◽  
Stiffened Panels ◽  
Boundary Element Analysis

The Study on Fatigue Crack Propagation in Metal Using Finite Element Analysis

2011 ◽  
Vol 462-463 ◽  
pp. 657-662
Author(s):  
K.A. Zakaria ◽  
Shahrum Abdullah ◽  
Mariyam Jameelah Ghazali
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Cast Alloy ◽  
Crack Propagation Rate ◽  
Propagation Rate ◽  
Repeated Loading ◽  
Constant Amplitude ◽  
Element Analysis ◽  
Standard Size

Fatigue in materials is caused by repeated loading and unloading cycles below the ultimate strength of a material. Fatigue tests are expensive since they required a lot of time consuming. Simulation of fatigue crack propagation using commercial software can reduce the costs related to time. The purpose of this study is to compare the fatigue crack propagation in metal under variable and constant amplitude loading. A standard size of aluminum cast alloy specimen according to ASTM E647 document was modelled using a pre-processor and it was later being analysed. In another aspect, strain gauges were attached to an engine mounting bracket and connected to the data acquisition set in order to capture the actual strain signals when an automobile was driven on to different road conditions. For the simulation purpose, a constant amplitude loading was then derived from a variable amplitude loading obtained from the data capturing process. The related parameters on between different road conditions, variable and constant amplitude loadings and crack propagation rate were presented. The relationship between those parameters were finally correlated and discussed.

scholarly journals Dual Boundary Element Method In Modelling of Fatigue Crack Propagation

2008 ◽  
Vol 20 (1) ◽  
pp. 45-55
Author(s):  
Ahmad Kamal Ariffin Mohd Ihsan ◽  
◽  
Nik Abdullah Nik Mohamed ◽  
Fadhlur Rahman Mohd Romlay ◽  
Keyword(s):  
Fatigue Crack ◽  
Boundary Element Method ◽  
Crack Propagation ◽  
Boundary Element ◽  
Fatigue Crack Propagation ◽  
Dual Boundary Element Method ◽  
Element Method

Fatigue Crack Propagation Experimental Evaluation and Modeling in an Austenitic Steel Elbow From a LMFBR Primary System Piping

2014 ◽  
Author(s):  
Daniel Garcia-Rodriguez ◽  
Yasuhide Sakakibara
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Low Cycle Fatigue ◽  
Primary System ◽  
Element Analysis ◽  
Real Size ◽  
Cost Efficient ◽  
The Cost ◽  
Good Agreement

In this work the behavior of high temperature (400C) low-cycle fatigue crack propagation during in-plane bending of an elbow from Monju Liquid Metal Fast Breeder Reactor (LMFBR) is presented in three stages. First, experimental measurements made in a real-size laboratory specimen are presented. This test was carried out under displacement-controlled conditions, with artificial defects introduced in the crown parts, where the maximum stress arises. Second, the experimental setup is simulated making use of Finite Element Analysis (FEA), in order to obtain the actual stress distribution through the loaded elbow. Finally, based on the FEA data, deterministic fatigue crack propagation based on the J-integral criterion is compared with the experimental data. Overall a good agreement was observed between experimental and analysis results, highlighting our capacity to evaluate such phenomena without necessarily incurring into extensive experimental work. In the future these tools will keep supporting the cost-efficient acceleration and improvement of LMFBR design and inspection criteria.

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