Thermal Plastics

In: Other Topics

Submitted By Matthew10
Words 566
Pages 3
This article was picked because it shows a strong correlation of statistics used in the plastic industry. Fiber-reinforced composites are used for their superior mechanical properties and advantages for applications in aerospace and transportation. Delamination is a mode of failure for composite materials. Modes of failure are also known as ‘failure mechanisms’. Delamination is a problem associated with drilling fiber-reinforced composite materials. In this sample, the effects of feed speed, rotational speed and drill geometry on the resulting delamination factor are comparable in spite of the drill point angle used. A statistical model is proposed to predict delamination in drilling glass fiber-reinforced plastic composites.
Key words: Delamination, Drilling

The article focuses on the delamination when drilling fiber-reinforced composite materials that, in addition to reducing the structural strength of the material, also this causes poor assembly tolerance, which could cause potential problems through out the life- time of the material. The hypothesis behind the problem lies in reducing the downward force when drilling. Two problems when drilling the material is peel-up and push-out at the drill exit.
There are several techniques along with several different eqautions that are used to measure the delamination after drilling composite material. Some techniques include optical microscopy, scanning and digital photography. The delamination factor has been widely used to group the level of damage on the work material at entrance and exit of the drill. The delamination factor may be calculated from the ratio of the maximum diameter of the delamination area to the drill diameter.
The experiment seems to be very controlled and precise. The tools used in the experiment are responsible for the accuracy that was conducted in the experiment. The optical…...

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