Study on Dynamic Erosion Behavior of 20# Steel of Natural Gas Gathering Pipeline

Figure 13

Impact stress contour impacted by multiparticles at different impact angles: (a) 15°, (b) 30°, (c) 45°, (d) 60°, (e) 75°, and (f) 90°(the left figures are of triangular prism shape, and the right figures are of spherical shape).

(a)

(b)

(c)

(d)

(e)

(f)