An analysis of the delamination of an environmental protection coating under cyclic heat loads

Hattiangadi, Ashwin; Siegmund, Thomas

doi:10.1016/j.euromechsol.2005.01.003

Cited by 19 publications

(10 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, heat is transported also by radiation between the two faces of the crack, but this contribution is very small as reported in [5] and is not taken into account here. Therefore, the normal and tangential components of the interface heat flux can be written as…”

Section: Heat Conductance and Thermal Expansion Through An Interfacementioning

confidence: 82%

“…When the two crack surfaces touch, the real contact localizes at certain spots due to surface roughness. Then the heat flow is constricted to flow through the contacting asperities and the gas in the cavities formed in between them [5,13]. Recently, parallel to the growing interest in multi-scale modelling, improved thermal contact resistance models incorporating complex surface roughness profiles and interaction between the asperities, have been proposed [14,15].…”

Section: Heat Conductance and Thermal Expansion Through An Interfacementioning

confidence: 99%

“…Pursuing a phenomenological approach, the same authors presented a model [5,11] where the heat transfer along the interface is neglected. Though it is sufficient for the loading conditions considered in these studies, in some other cases (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…This clearly influences the thermal strains and may alter the mechanical response significantly in return. Meso-level modeling of concrete failure under fire and the reliability analysis of thermal protection layers are two examples which necessitate a proper thermo-mechanical interface description at different scales as presented in [4,5].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Thermo-mechanical cohesive zone model

2010

View full text Add to dashboard Cite

In this paper, a cohesive zone formulation that is suitable for the thermo-mechanical analysis of heterogeneous solids and structural systems with contacting/ interacting components, is presented. Well established traction-opening relations are adopted and combined with micromechanically motivated heat flux-opening relations reflecting the evolving heat transfer through the interfaces. The finite element approach for a coupled analysis within an operator-split solution framework is presented and demonstrated with an example problem.

show abstract

Section: Heat Conductance and Thermal Expansion Through An Interfacementioning

confidence: 82%

Section: Heat Conductance and Thermal Expansion Through An Interfacementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Thermo-mechanical cohesive zone model

2010

View full text Add to dashboard Cite

show abstract

“…Results show that Mode I debonding initiation can be predicted by the dimensionless interface strength ð " SÞ term given in Eq. (8). This term relates the coating curvature (j), thickness (t), and Young's modulus (E) to the normal interface strength (r max )…”

Section: Resultsmentioning

confidence: 99%

Computational Investigation of the Delamination of Polymer Coatings During Stent Deployment

2010

View full text Add to dashboard Cite

Recent advances in angioplasty have involved the application of polymer coatings to stent surfaces for purposes of drug delivery. Given the high levels of deformation developed in the plastic hinge of a stent during deployment, the achievement of an intact bond between the coating and the stent presents a significant mechanical challenge. Problems with coating delamination have been reported in recent experimental studies. In this paper, a cohesive zone model of the stent-coating interface is implemented in order to investigate coating debonding during stent deployment. Simulations reveal that coatings debond from the stent surface in tensile regions of the plastic hinge during deployment. The critical parameters governing the initiation of delamination include the coating thickness and stiffness, the interface strength between the coating and stent surface, and the curvature of the plastic hinge. The coating is also computed to debond from the stent surface in compressive regions of the plastic hinge by a buckling mechanism. Computed patterns of coating delamination correlate very closely with experimental images. This study provides insight into the critical factors governing coating delamination during stent deployment and offers a predictive framework that can be used to improve the design of coated stents.

show abstract

A nonlinear cohesive/friction coupled model for shear induced delamination of adhesive composite joint

Liu

Peng

2016

Int J Fract

View full text Add to dashboard Cite

An analysis of the delamination of an environmental protection coating under cyclic heat loads

Cited by 19 publications

References 21 publications

A Thermo-mechanical cohesive zone model

A Thermo-mechanical cohesive zone model

Computational Investigation of the Delamination of Polymer Coatings During Stent Deployment

A nonlinear cohesive/friction coupled model for shear induced delamination of adhesive composite joint

Contact Info

Product

Resources

About