Improved Crack Closure Line Position: An Improved Model for Crack Breathing Phenomenon
نویسندگان
چکیده
منابع مشابه
Improved quarter-point crack tip element
We present a modification to the quarter-point crack tip element and employ this element in two-dimensional boundary integral fracture analysis. The standard singular element is adjusted so that the near-tip crack opening displacement satisfies a known constraint: the coefficient of the term which is linear in the distance to the tip must vanish. Stress intensity factors calculated with the dis...
متن کاملApplication of a Crack-closure Model for Turbine Life Assessment
This paper describes the application of a fracture mechanicsbased procedure for life estimation that allows complex load cycle effects to be included. The procedure is based on technology developed by the aerospace industry, which includes LCF and HCF loading and incorporates local plastic strain effects at the crack tip. The procedure assumes that starter cracks are initiated at inherent defec...
متن کاملOn Crack Closure and Crack Tip Shielding during Fatigue Crack Growth
Fatigue crack growth can be strongly influenced by crack closure, i. e., the contacting of the opposing faces of a fatigue crack above the minimum load in a loading cycle. This crack closure shields the crack tip from the full stress field, but different views are held regarding the extent of this shielding. The type of closure, whether it be plasticity-induced, or roughness-induced may also pl...
متن کاملTheory for the rate of crack closure
The theory for the constant rate of crack closure was investigated. The aim of this theory is to explain why the rate of crack closure is constant during the wetting stage of healing. Assuming that a surface crack in a material is treated by compression or with solvent, its crack closes up at a constant rate and its shape is independent of time. This approach was based on the Gibbs energy of an...
متن کاملImages Crack Detection Technology based on Improved K-means Algorithm
Crack detection is very important to prevent major accident in civil engineering works, but it is still problematic in implementation. The traditional K-means algorithm only takes pixel values into account, which causes the extraction of pavement crack is not accurate. In order to improve the efficiency and accuracy, a novel algorithm is proposed. It is a combination of the improved K-means alg...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The International Journal of Acoustics and Vibration
سال: 2015
ISSN: 2415-1408
DOI: 10.20855/ijav.2015.20.3376