Numerical investigation on the elastic–plastic transition of a cylindrical coating/substrate composite under normal compression

Abstract

Numerical investigation on the plastic initiation of a coated cylinder in contact with a rigid plane.

Continuously Growing Ultrathick CrN Coating to Achieve High Load-Bearing Capacity and Good Tribological Property

“…Combining eqs , , and , the maximum contact pressure stress of the CrN coatings is decreased and the position of the maximum stress is simultaneously moved into the coating interface as the coating thickness increases, both of which have been identified by many researchers using the FEM simulation. ,, Also, according to the von Mises yield criterion , and combining eqs , , and , the stress (σ eq ) at any location on the depth directions ( z axis) can be expressed as follows It has been reported that ϑ for the CrN coating is 0.25. Hence, the maximum depth of contact stress is 19.35 μm under the load of 10 N, which is bigger than the thickness of CrN­(5 h) coatings, but much smaller than the thickness of CrN­(12 h) coatings.…”

“…According to the Hertz solution, − the contact pressure of the compressed coatings is distributed in a planes-strain model (Figure ). The parameter F represents the normal load and R represents the counterpart ball radius.…”

“…Combining eqs 1, 2, and 3, the maximum contact pressure stress of the CrN coatings is decreased and the position of the maximum stress is simultaneously moved into the coating interface as the coating thickness increases, both of which have been identified by many researchers using the FEM simulation. 8,62,63 Also, according to the von Mises yield criterion 59,61 and combining eqs 4, 5, and 6, the stress (σ eq ) at any location on the depth directions (z axis) can be expressed as follows…”

Response of corrosion protection coating systems for offshore components to high compressive loads during lifting

“…For a cylindrical contact of a coating/substrate composite under normal compression, Mu et al [ 26 ] derived a critical force for an elastic‐plastic transition of the compressed coating: $$${F}_{{\rm{C}}}=\frac{{\rm{\pi }}\cdot {R}_{{\rm{D}}}\cdot {<mpadded xmlns="http://www.w3.org/1998/Math/MathML">\sigma </mpadded>}_{{\rm{Y}}}^{2}\cdot (1-{<mpadded xmlns="http://www.w3.org/1998/Math/MathML">\nu </mpadded>}_{{\rm{C}}}^{2})\cdot {<mpadded xmlns="http://www.w3.org/1998/Math/MathML">C</mpadded>}_{{\rm{v}}}^{2}}{{E}_{{\rm{C}}}},$$$with $$${C}_{{\rm{v}}}=1.164+2.977\cdot {\nu }_{{\rm{C}}}-2.914\,\cdot \,{<mpadded xmlns="http://www.w3.org/1998/Math/MathML">\nu </mpadded>}_{{\rm{C}}}^{2}(\text{for}\ {\nu }_{{\rm{C}}}=0.2\,\text{to}\,0.5).$$$…”