A new scheme for crack growth modeling by coupling modified quarter point crack-tip element and the level set method
Other Title(s)
مخطط جديد لنمو التشقق باستعمال النمذجة عن طريق ربط العناصر المنتهية المحسنة ذات الربع نقطة و بطريقة مجموعة المستوى
Author
Source
The Journal of Engineering Research
Issue
Vol. 10, Issue 2 (30 Jun. 2013), pp.46-51, 6 p.
Publisher
Sultan Qaboos University College of Engineering
Publication Date
2013-06-30
Country of Publication
Oman
No. of Pages
6
Main Subjects
Topics
Abstract AR
في هذه الورقة, نقدم طريقة رقمية فعالة لتتبع تطور التشقق دون الحاجة الى إعادة تشكيل الشبكة الرقمية.
و الفكرة الأساسية تكمن في ربط العناصر المنتهية المحسنة ذات الربع نقطة (MQPE) بطريقة مجموعة المستوى (LSM) طريقة مجموعة المستوى تستعمل لتحديد مواقع الشقوق بينما تستعمل العناصر المنتهية MQPE لحساب عوامل شدة الإجهادات.
و قد أدرجنا مجموعة من التطبيقات على عينات تحتوي على نماذج مختلفة من الشقوق لإثبات دقة و نجاح المخطط MQPE/LSM على التمثيل الدقيق للانفرادية بجوار الشقوق مما يسمح بتمثيل اقتصادي لعوامل شدة الإجهادات دون الحاجة إلى إعادة تشكيل الشبكة.
Abstract EN
In this paper, an efficient, numerical procedure is presented to track crack growth modeling without remeshing.
The method's key feature is the coupling of a modified quarter-point crack tip element (MQPE) with the level set method (LSM) for crack growth problems.
The LSM was used to represent the crack location, including the location of crack tips.
The MQPE was used to compute the stress and displacement fields necessary for determining the rate of crack growth.
Numerical test cases including various geometrical exceptions (the center-crack plate specimen, the single edge-crack plate specimen, and the double-edge crack plate) demonstrate the accuracy, robustness, and efficiency of the MQPE / LSM coupling.
The extrapolation technique was used to estimate numerically the calibration factor for various specimens.
This work confirms the feasibility of the MQPE / LSM to model accurately the singularity existing in the vicinity of the cracks.
It allows an economic and adequate calculation of the stress intensity factors, which can be introduced into the various criteria of fracture or laws of propagation of the crack.
The new method reduces the need for remeshing, and results agree well with reference data.
American Psychological Association (APA)
Abd al-Aziz, Yazid. 2013. A new scheme for crack growth modeling by coupling modified quarter point crack-tip element and the level set method. The Journal of Engineering Research،Vol. 10, no. 2, pp.46-51.
https://search.emarefa.net/detail/BIM-330335
Modern Language Association (MLA)
Abd al-Aziz, Yazid. A new scheme for crack growth modeling by coupling modified quarter point crack-tip element and the level set method. The Journal of Engineering Research Vol. 10, no. 2 (Jun. 2013), pp.46-51.
https://search.emarefa.net/detail/BIM-330335
American Medical Association (AMA)
Abd al-Aziz, Yazid. A new scheme for crack growth modeling by coupling modified quarter point crack-tip element and the level set method. The Journal of Engineering Research. 2013. Vol. 10, no. 2, pp.46-51.
https://search.emarefa.net/detail/BIM-330335
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 50-51
Record ID
BIM-330335