Experimental investigation of surface instabilities in cylindrical tensile metallic specimens

Pattern formation on free surfaces via plastic buckling and periodic folding

“…Besides surface features, the buckling-folding phenomenon has been successful in explaining the formation of wear particles in sliding contacts by delamination, and occurrence of platelet-like defects on surfaces [19,20]. Equally importantly, the resulting surface morphological features share remarkable similarities with phenomena in viscoplastic fluid flow [23], sheet metal forming [24,25], and even geophysics [12], potentially suggesting a common continuumscale description. This patterning route also appears to be controllable and one could envisage exploiting it for forming specific large-scale surface features.…”