TY - GEN
T1 - Defect evolution on coated samples under severe thermal transients and interfacial characterization
AU - Harris, J. T.
AU - Segall, A. E.
AU - Robinson, D.
AU - Carter, R.
PY - 2012
Y1 - 2012
N2 - The effects of severe thermal- and pressure-transients on coated substrates with indentation-induced, blister defects were analyzed using experimental and finite-element methods. Both explicit and implicit FEA approaches were used to assess the transient thermal- and stress-states and the propensity for fracture related damage and evolution, while undergoing uniform convective heating and pressure transients across the surface. Spherical indentations along with in-situ acoustic emissions, c-scans, and finite element modeling were utilized to induce the defects, as well as quantify interfacial adhesion and cohesive zone properties. Preliminary results indicated complex interactions between the boundary conditions and their timing and the resulting propensity for damage birth and evolution. Given the need for robust coatings, the experimental and modeling procedures explored by this study will have important ramifications for coated tube designs and the evaluation of candidate materials.
AB - The effects of severe thermal- and pressure-transients on coated substrates with indentation-induced, blister defects were analyzed using experimental and finite-element methods. Both explicit and implicit FEA approaches were used to assess the transient thermal- and stress-states and the propensity for fracture related damage and evolution, while undergoing uniform convective heating and pressure transients across the surface. Spherical indentations along with in-situ acoustic emissions, c-scans, and finite element modeling were utilized to induce the defects, as well as quantify interfacial adhesion and cohesive zone properties. Preliminary results indicated complex interactions between the boundary conditions and their timing and the resulting propensity for damage birth and evolution. Given the need for robust coatings, the experimental and modeling procedures explored by this study will have important ramifications for coated tube designs and the evaluation of candidate materials.
UR - http://www.scopus.com/inward/record.url?scp=84883431090&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84883431090&partnerID=8YFLogxK
U2 - 10.1115/PVP2012-78358
DO - 10.1115/PVP2012-78358
M3 - Conference contribution
AN - SCOPUS:84883431090
SN - 9780791855027
T3 - American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
SP - 877
EP - 894
BT - ASME 2012 Pressure Vessels and Piping Conference, PVP 2012
T2 - ASME 2012 Pressure Vessels and Piping Conference, PVP 2012
Y2 - 15 July 2012 through 19 July 2012
ER -