Polymers are used in biological micro-nanoelectromechanical systems BioMEMS/NEMS applications due to their desirable mechanical properties, biocompatibility, and reduced cost relative to silicon microfabrication processes. Understanding the interfacial properties of the films that are used in BioMEMS/NEMS serves as a useful tool in obtaining higher device yield and greater mechanical reliabilit...

In this paper we report on the mechanism of delamination in light-emitting diode (LED) packages and its effects on thermal characteristics of LEDs. The LED samples were subjected to moisture preconditioning treatments followed by heat block testing. Transient thermal measurements were performed for the investigation of the thermal behavior of the delaminated LEDs. Increase of thermal resistance...

Herein we report on a general approach to delaminate multi-layered MXenes using an organic base to induce swelling that in turn weakens the bonds between the MX layers. Simple agitation or mild sonication of the swollen MXene in water resulted in the large-scale delamination of the MXene layers. The delamination method is demonstrated for vanadium carbide and titanium carbonitride MXenes.

Despite the long history of the use of laminated glass in buildings there is concern with some architects on the potential for serious delamination issues with laminated glass. This paper provides test data on the edge stability of laminated glass and details various types of delamination problems, which can arise if proper glass processing and installation practices are not followed. Guidance ...

SUMMARY The use of composite laminates in complex structures has increased significantly. However, there are still some issues when considering their use, mainly related with machining, leading to some difficulties and lack of acceptance. In this work, a methodology to evaluate drill geometry and feed rate based on thrust force and delamination extension is presented. INTRODUCTION For the past ...

The characteristics of carbon fibre reinforced plastics allow a very broad range of uses. Drilling is often necessary to assemble different components, but this can lead to various forms of damage, such as delamination which is the most severe. However, a reduced thrust force can decrease the risk of delamination. In this work, two variables of the drilling process were compared: tool material ...

The orientation dependence of Charpy toughness has been investigated in API-X80 linepipe steel. The occurrence of delamination and preferential alignment of {100} cleavage planes are found to contribute to the observed anisotropy in Charpy properties. Delamination is also related to the presence of banding in the hot–rolled alloy, and the additional plasticity it entails during the process of f...

We consider the buckle-driven delamination of biaxially compressed thin films. Telephone-cord-like patterns observed in experiments are explained as a result of the buckling behavior of the film. We perform a stability analysis of a straight blister. A mechanism of instability causing undulations in an advancing finger of delamination is pointed out, which we claim to be the basic phenomenon ex...

Failures detection in composite laminates is complicated respect to conventional non-destructive testings for metal structures, due their sensibility echoes drown noise depending by the different properties of constituent materials and multi-layered composites structures. The latter, particular, are sensitive impact damage also a low-energy can results severe loss load capacity as result delami...