Material Analysis of Aircraft Wing Skin

OBJECTIVE To ensure and guarantee the safety of flight, the materials in an aircraft used is an important element. This includes small parts like nuts, bolts and screw. The materials are chosen because they must have a certain features like light and extremely strong This project looks into the parts of an airplane mainly the wing. The wing of an aircraft comprises of skin, spar, ribs and stringer. We will further discuss into the properties, test standards and factors of the materials being chose for each part of the wing. However the materials used differ depending on the models and the company that produces it, therefore we set up Boeing 737-700 as our model. Various resources including journals, books and even websites were used as our reference. The possibility of changing the materials currently used for something better in terms of cost and materials are also studied. The economic aspect will also be focused on such as the cost, availability and the effect on product regarding the selection. By studying the properties of aircraft, we are looking to enhance our engineering skills predominantly on engineering materials as well as to adapt ourselves in the world of aviation industry.

MAIN AIRCRAFT WINGS – SPAR
In a fixed-wing aircraft, the spar is often the main structural member of the wing, running span wise at right angles to the fuselage. The spar carries flight loads and the weight of the wings while on the ground. Hence, in order to do the materials for a wing spar needs to be very strong and highly elastic. For the Boeing 737, the spars of the wings are made up of aluminium alloy 7178 which mainly consists of aluminium, zinc, magnesium, chromium & copper composites. In this section, we will briefly descript the aluminium 7178 properties, its test standard, reasons why this material are chosen to make this part of the wing spar and suggestion of new material to substitute the current material.
Properties Needed For A Wing Spar.
1. Can