tailieunhanh - Fracture of underwater notched structures

The results of this paper can be used for standardization of the fracture in underwater structures containing V-notched components. | Fracture of underwater notched structures Engineering Solid Mechanics 4 2016 43-52 Contents lists available at GrowingScience Engineering Solid Mechanics homepage esm Fracture of underwater notched structures . Mirsayara and Behrouz Takabib a Zachry Department of Civil Engineering Texas A amp M University College Station TX 77843-3136 USA b Department of Mechanical Engineering Texas A amp M University College Station TX 77843 USA ARTICLE INFO ABSTRACT Article history Underwater structures are subjected to hydrostatic pressure during their service life. Sharp V- Received 6 September 2015 notched components can be seen as a part of many underwater structures. For example welded Accepted 20 December 2015 components machined parts gears screws and bolts are among the well-known elements that Available online contain sharp V-notches. The notch tip is a likely zone for initiation of cracks due to high stress 21 December 2015 Keywords strain concentration. The reliability analysis of the V-notched components requires a good Underwater structures understanding of stress strain distribution near the notch tip. The fracture initiation of the V- V-notch notched components can be controlled by the tangential strain field near the notch tip. The Fracture tangential strain distribution and fracture initiation conditions are studied in this paper for Hydrostatic pressure notched components subjected to hydrostatic pressure. The effect of each tangential strain term on fracture initiation angle as well as tangential strain distribution around the notch tip is investigated using finite element simulation of a V-notched semi-circular specimen. It is shown that not only the singular terms but also the constants train field significantly influence on tangential strain distribution and fracture initiation angle around the notch tip. The results of this paper can be used for standardization of the fracture in underwater structures containing V-notched .