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Context 1
... valve has a height of approximated 26 meters, 400 tons and 4 stages of operation. At the bottom the valve has two rams in charge of executing the cut of the riser by means of tangential forces. On Fig. 1 shows the Deep-water Horizon BOP Port Side. ...
Context 2
... tensions found by the von Mises criterion resulted in 1042 MPa with rounded geometry (Fig 12). And with the most severe geometry, the von Mises maximum stress was 954.7 MPa (Fig. 13). ...
Context 3
... tensions found by the von Mises criterion resulted in 1042 MPa with rounded geometry (Fig 12). And with the most severe geometry, the von Mises maximum stress was 954.7 MPa (Fig. 13). It was noted that the material does not fail with the sharp geometry, but with the rounded geometry the maximum tension found is above the maximum hardening stress. Therefore, the rupture of the material can be considered. The hardening curve inserted on the Abaqus has a maximum stress strain equal to the second von Mises stress ...
Context 4
... sequence of Figures 14a-14f shows the evolution of von Mises equivalent stress as the ram advanced in the cut. A tension distribution with the highest tension as expected is observed in the contact region. ...
Context 5
... of von Mises equivalent stress as the ram advanced in the cut. A tension distribution with the highest tension as expected is observed in the contact region. While the ram advances, the contact surface increases and the riser deforms in the shape of the curvature of the riser tip. In the first images, a crushing of the tube is observed until Fig. 14d. The elements began to be deleted until, according to Fig. 14f, the total separation of the tube. Figure 14 -Evolution of shear cut Just as the displacement increases, it is possible to note the effectiveness of the cutting of the constituent elements of the riser. Although of having been quite refined and improved the mesh in the cut ...
Context 6
... cut. A tension distribution with the highest tension as expected is observed in the contact region. While the ram advances, the contact surface increases and the riser deforms in the shape of the curvature of the riser tip. In the first images, a crushing of the tube is observed until Fig. 14d. The elements began to be deleted until, according to Fig. 14f, the total separation of the tube. Figure 14 -Evolution of shear cut Just as the displacement increases, it is possible to note the effectiveness of the cutting of the constituent elements of the riser. Although of having been quite refined and improved the mesh in the cut region we can see some elements that present characteristics of ...
Context 7
... elements began to be deleted until, according to Fig. 14f, the total separation of the tube. Figure 14 -Evolution of shear cut Just as the displacement increases, it is possible to note the effectiveness of the cutting of the constituent elements of the riser. Although of having been quite refined and improved the mesh in the cut region we can see some elements that present characteristics of tension concentration and is not eliminated, this can be improved by seeking an optimization of both the geometric forms of the more homogeneous elements and the mesh. ...
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