List of Articles Crack Propagation

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  1 - Microstructural Investigations and Fracture Analysis of a Multi-Layer Al Panel of a Crashed Aircraft
  H.R. Faridi A. Momeni M. Mohammadpour V. Sarfarazi
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  2 - Evaluating the Effects of Overload and Welding Residual Stress in Fatigue Crack Propagation
  Ali Moarefzadeh Shahram Shahrooi Mehdi Jalali Azizpour
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  3 - Geometrical Optimization of the Cast Iron Bullion Moulds Based on Fracture Mechanics
  A Niknejad M Karami Khorramabadi M.J Sheikhpoor S.A Samieh Zargar
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  4 - Designing and Manufacturing of Test Set Up for Rapid Crack Propagation Test with Experimental Measurement of Tip Crack Growth Speed in Transmission pipes
  Sayed Mahmoud Madani Mohammadreza Forouzan Ali Reza Salehian
  Gas and liquid transmission is a routine activity in the oil industry, powerhouses, petrochemicals and nuclear industries. The pipes are exposed to micro cracks in the inner and outer surface due to factors like corrosion and fatigue in the manufacturing process. If the More

  Gas and liquid transmission is a routine activity in the oil industry, powerhouses, petrochemicals and nuclear industries. The pipes are exposed to micro cracks in the inner and outer surface due to factors like corrosion and fatigue in the manufacturing process. If the aligned cracks are all over, the rapid crack growth phenomenon occurs. In this case, crack will grow at high speed along the pipe axis. In this research that has been conducted for the first time in the country, the measurement of the growth rate of the crack tip is done in two ways: High-Speed camera and timing wire system in the seamless aluminum 6063-T5 pipes. The bursting pressure of the specimens with the initial crack depth of 0.8, 1.0 and 1.2 mm are 70, 65 and 58 bar. The resulting growth rates in High-Speed camera and timing wire system is about 120 to 132 and 120 to 126 m/s. The qualitative results of this research matches well with other researches in this field in other journals. Manuscript profile
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  5 - Investigating the Effect of Residual Stress on Fatigue Crack Propagation by Modified J-integral and Experimental Method
  Ali Moarrefzadeh Shahram Shahrooi
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  6 - Investigation of the Bond - Slip Effect on Cracking of RC Panel Using Lattice Model
  Hamide shojaefar Masoud farzam
  ABSTRACT        The present paper studiesthree bond-slip models (CEB-FIP, Harajli and Farra) based on thefindings of previous experimental studies in order to investigate the influence of bond-slip on crack spacing and crack propagation in RC More

  ABSTRACT        The present paper studiesthree bond-slip models (CEB-FIP, Harajli and Farra) based on thefindings of previous experimental studies in order to investigate the influence of bond-slip on crack spacing and crack propagation in RC panel. For this purpose, the RC panel is modeled using a lattice type numerical model in ABAQUS software, in which the cracking process is represented by the damage of the concrete bar elements. The lattice models are proposed based on an improved cracking criterion, which is derived from fracture mechanics principles. Concrete and steel are combined based on a model of the interaction (bond-link) through bond-slip in order to describe the behavior of the composite reinforced concrete material. The results of this analysis showed that the effects of diverse bond-slip models on crack spacing, crack propagation and damage localization are significant. Manuscript profile
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  7 - Application of image-processing to crack propagation process identification in concrete under fatigue phenomenon
  Mohsen Heydari Mofrad Yasin Hoseini-Azar
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  8 - بررسی انتشار ترک در مواد الاستیک خطی با در نظر گرفتن ضریب تصحیح مسیر ترک
  مهدی پورمحمود
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  9 - بررسی انتشار ترک در مواد الاستیک خطی با در نظرگرفتن ضریب تصحیح مسیر ترک
  مهران مرادی مهدی پورمحمود
  مدل کردن انتشار ترک به روش اجزا محدود تحت شرایط مختلف بارگذاری از اهمیت فوق‎‎‎العاده‎ای در مکانیک شکست برخوردار است. در این مقاله، با استفاده از علم مکانیک شکست الاستیک خطی، فرآیند رشد ترک بر اساس معیار حداکثر تنش اصلی که توسط ضرایب شدت تنش بیان می‎& More

  مدل کردن انتشار ترک به روش اجزا محدود تحت شرایط مختلف بارگذاری از اهمیت فوق‎‎‎العاده‎ای در مکانیک شکست برخوردار است. در این مقاله، با استفاده از علم مکانیک شکست الاستیک خطی، فرآیند رشد ترک بر اساس معیار حداکثر تنش اصلی که توسط ضرایب شدت تنش بیان می‎‎شود، تحلیل می‎گردد. همچنین، روشی برای تصحیح جهت انتشار ترک در آنالیز اجزا محدود بیان شده تا بتوان در تحلیل‎های مختلف یک مسئله با در نظر گرفتن پیشروی‎های متفاوت ترک، در نهایت مسیر ترک واحدی به‌دست آورد. در هر مرحله از پیشروی ترک، جهت تحلیل ناحیه‎ی تنش منفرد نوک ترک از المان‎‎های منفرد در روش اجزا محدود استفاده می‎شود. نتایج چنین تحلیلی برای چندین مدل با هندسه‎های مختلف آورده شده است. Manuscript profile