Experimental study on micro manufacturing of carbon nanotube (CNT) plastic composites

Abstract

Conventional twist drilling is a widely used machining process for creating holes in aerospace and automobile structures. Drilling at room temperature can sometime affect the quality of machined holes due to increased thermal effects on the workpiece. Thermal effects can be a cumbersome when machining composites and fiber metal laminates due to their different thermal expansion coefficients, which may introduce additional stress in the structure. Thermal machining effects can be minimized using coolants supplied either directly or indirectly to the cutting tool-workpiece interaction zone, to remove away part of the generated heat. The use of coolants adds extra costs for handling, disposal, and environmental impact. Therefore, environmentally friendly cooling technologies are replacing conventional cooling methods to reduce costs and impact on the environment. In addition, the selection of machining parameters has great influence on the hole quality. This paper investigates the impact of drilling parameters and two modern cooling technologies namely cryogenic liquid nitrogen and minimum quantity lubrication on the hole perpendicularity error of fiber metal laminates commercially known as GLARE® (Glass Laminate Aluminum Reinforced Epoxy). It was also found that applying cryogenic liquid nitrogen or minimum quantity lubrication does not lead to an improvement in hole perpendicularity error in GLARE® laminates.

Neural network modeling and combined compromise solution (CoCoSo) method for optimization of drilling performances in polymer nanocomposites

“…This reduces the surface damages and defects during machining. [65][66][67] In the present work, the result obtained at optimal setting shows a satisfactory agreement with the actual data. The experiment was carried out on the optimal setting and shown in…”

“…torque and thrust force) due to developed strain, which increases the load on cutting tool, in turn, deteriorate the machining surface. 67 The higher MWCNT addition into the epoxy matrix can reduce the rate of strain to failure and ultimate tensile strength, which enables the smooth removal of material. 66…”

Моделирование Взаимодействия Углеродных Нанотрубок С Атомами Водорода

“…В настоящее время во всем мире проводятся широкие исследования по изучению взаимодействия атомов с углеродными наноструктурами [1][2][3][4][5]…”

Micro milling of polymeric micro injected specimens with randomly oriented carbon nanotube fillers

“…The composites present an anisotropic behaviour and the filler alignment affects their properties, hence, for some applications a different fabrication process is needed to enhance the control of the filler distribution. For this purpose, a multistage process chain can be used, exploiting the advantages of various manufacturing processes to obtain the desired product characteristics (Mahmoodi et al, 2013a;Attanasio et al, 2017). This paper studies an alternative way to obtain micro features, based on the machining of specimens fabricated using micro injection moulding, but with low shear rate, so that the filler position and orientation are not affected by the process.…”