...Jialiang Cen; Kyriakos Komvopoulos A contact mechanics analysis of interfacial delamination in elastic and elastic-plastic homogeneous and layered half-spaces due to normal and shear surface tractions induced by indentation and sliding was performed using the finite element method. Surface...

... of the delamination length and complex data reduction. Email: dingjiancan1109@sjtu.edu.cn Email: gejingran@bit.edu.cn Email: zhangqibit@163.com Contributed by the Applied Mechanics Division of ASME for publication in the J ournal of A pplied M echanics . Email: xuwu@sjtu.edu.cn...

..., there is a delamination between two unidirectional carbon fiber polymer-reinforced plies with fibers in the 0 deg and 90 deg directions. Failure criteria for these materials have been presented previously. In this study, invariant parameters are used in the failure criteria. It is seen that the invariant length parameter...

... buckling of an unbonded section is a necessary, but not sufficient, condition for delamination. For that configuration, buckling occurs at the Euler buckling load of a fixed–fixed plate. Although the present study does not include friction or tangential interface stresses, the onset of buckling should...

...Mor Mega; Orly Dolev; Leslie Banks-Sills Several two- and three-dimensional mixed-mode interface failure criteria are proposed for predicting delamination failure in multidirectional, laminate composites. The proposed criteria, based on the stress intensity factors K 1 , K 2 , and K I I I , as well...

.../s10853-006-0197-2 Pankow , M. , Salvi , A. , Waas , A. M. , Yen , C. F. , and Ghiorse , S. , 2011 , “ Resistance to Delamination of 3D Woven Textile Composites Evaluated Using End Notch Flexure (ENF) Tests: Experimental Results ,” Compos. Part A. , 42 ( 10 ), pp. 1463...

... with no longitudinal constraint and (ii) no constraint (cf. Fig. 1 ). In the analysis that follows, the stress change relative to the hot state at any time during cooldown is determined for the uncracked bilayer far ahead of the delamination crack tip and in the two separated layers far behind the crack tip...

...Ruzica R. Nikolic; Jelena M. Djokovic In this paper the delamination of coating subjected to compressive stress on a cylindrical substrate is considered. This problem is particularly interesting in oxide coatings on wire elements exposed to extreme temperatures and in ceramic coatings on turbine...

...M. Y. He; J. W. Hutchinson; A. G. Evans A stretch/bend method for the in situ measurement of the delamination toughness of coatings attached to substrates is described. A beam theory analysis is presented that illustrates the main features of the test. The analysis is general and allows...

... process of loading-adhesion and unloading-delamination. Several worked examples are given as illustrations. A limiting case of adhering identical cylinders is shown to be consistent with recent model constructed by Tang et al. Such results are of particular importance in modeling the aggregation...

... volume injection. The results indicate that the mode-mixity has no effect on the energy required for debonding, which suggests that wetting of the crack faces behind the debonding front eliminates friction. adhesion crack-edge stress field analysis delamination elastic moduli glass mechanical...

...Kai-tak Wan; Scott E. Julien A circular membrane clamped at the periphery is allowed to adhere to or to delaminate from a planar surface of a cylindrical punch in the presence of intersurface forces with finite range and magnitude. Assuming a uniform disjoining pressure within the cohesive zone...

... Γ (N/mm) Test 50 5 4.5 210 19 0.65 FEA 20 5 1.5 210 19 0.65 Comparison of analytical and FEA results Comparison of analytical and experimental results 29 04 2008 04 11 2008 16 06 2009 crack-edge stress field analysis delamination...

...Alireza Forghani; Reza Vaziri This paper presents a robust computational model for the response of composite laminates to high intensity transverse dynamic loading emanating from local impact by a projectile and distributed pressure pulse due to a blast. Delaminations are modeled using a cohesive...

...Z. Xue; A. G. Evans; J. W. Hutchinson Delamination of coatings initiated by small cracks paralleling the free surface is investigated under conditions of high thermal flux associated with a through-thickness temperature gradient. A crack disrupts the heat flow thereby inducing crack tip stress...

... are subjected to different temperatures and a two-dimensional steady-state temperature distribution develops. The case of compressively stressed coating is considered. Under this condition, buckling can occur, the crack can propagate, and the coating is prone to delamination. To predict the onset...

...Masaki Omiya; Kikuo Kishimoto; Takashi Nakano The delamination of thin coating films from substrates is a critical issue for the reliability of micro- and nanoelectronic devices. Indentation methods have the potential to measure interfacial strength in micro- and nanofilm thickness coating films...

...Zdeněk Bažant; Peter Grassl Because the observed size effect follows neither the strength theory nor the linear elastic fracture mechanics, the delamination fracture of laminate-foam sandwiches under uniform bending moment is treated by the cohesive crack model. Both two-dimensional geometrically...

...D. Wu; S. S. Law Delamination is a common type of damage in laminated fiber-reinforced polymer (FRP) composites. As FRP composites are becoming popular in upgrading and strengthening of civil concrete structures, the specific delamination damage, i.e., the FRP-concrete debonding, is considered more...

...M. Toya; M. Oda; A. Kado; T. Saitoh Energy release rates for an edge delamination of a laminated beam subjected to through-thickness temperature gradient are analyzed on the basis of the classical beam theory. The decomposition of the energy release rate into mode I and mode II components is made...