Predicting the impact of Residual Stresses on Crack Growth
There has been a significant increase in interest in simulating crack growth in the presence of residual stress fields. Residual stresses can occur due to the manufacturing or fabrication process such as welding where the stresses in the Heat Affected Zone (HAZ) can significantly impact the crack behaviour. Certain treatment processes such as Shot Peening and Cold Expansion are also used to control crack growth by inducing residual stresses.
In this extract from a BEASY tutorial a crack is initiated in a hole bore and crack growth is simulated through the residual stress field under a loading spectrum. The tutorial addresses how the residual stress field was obtained from an ABAQUS FEM model, and how this was then used (via the BEASY-ABAQUS interface) to generate the BEASY model, in order to predict how the crack would grow.
To review an extract from the tutorial click here
To find out more about the tutorial or BEASY's fracture software and services please contact [email protected] |
Recent newsletters
If you missed any recent newsletters, please follow the links below to access the earlier information: |
Tom Curtin attended the recent 2011 Aircraft Airworthiness & Sustainability Conference and presented the latest version of BEASY's fracture mechanics simulation solutions which have major applications in the assessment of crack like defects and Damage Tolerance analysis. BEASY is now more closely integrated with industry leading Finite Element (FEM) software packages such as PATRAN, ABAQUS and ANSYS to enable more rapid model building.
For further information, please select one of the links:
Fracture Assessment Datasheet
BEASY ABAQUS Datasheet
BEASY ANSYS Datasheet
BEASY NASTRAN Datasheet
BEASY PATRAN Datasheet
Another focus of the presentation was the recently developed corrosion modelling software which enables engineers to quickly assess the corrosion risk for structural components and the effectiveness of surface protection systems.
For further information, please click here and here |
Sharon Mellings recently attended ICAF 2011 in Montreal and made a presentation entitled "Improved Stress Intensity Factor Calculation in Riveted Panel Type Structures using Numerical Simulations"
This described some recent work to investigate the effect, on Stress Intensity Factors and crack growth paths, of load transfer between different members in riveted airframe structures. This incorporated complex loading, including contact loading at rivet holes, and changes to the load path when a growing crack causes a rivet to completely cease transferring load.
For information on this project, please click here
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Training
Hands-on courses which provide training to maximize the benefits from BEASY's fracture software, will be held in the US and UK as follows:
* US Fracture & Crack Growth Simulation - September 20th-22nd 2011
* UK Fracture & Crack Growth Simulation - November 1st-3rd 2011 For further information about BEASY, please visit our website: www.beasy.com or email us at [email protected] |