Structure-II-Reviewer PDF

What is a major use of steel in aircraft? What does a bearing load refer to? Manufacture of thin-walled box-section spars Load transferred through a fastener by contact with a sheet What is a disadvant...

What is a major use of steel in aircraft? What does a bearing load refer to? Manufacture of thin-walled box-section spars Load transferred through a fastener by contact with a sheet What is a disadvantage of titanium in aircraft use? Changes properties in extreme temperatures How does a butt joint transfer loads? Using a splice member with aligned sheets separated What material is heavier than wood but offers by a gap comparable strength? Plastic What does bypass load represent? The portion of load remaining in a sheet after partial Where is glass commonly used in modern aircraft? transfer Windscreens and windows What describes a double-shear joint? How does heat-strengthened glass compare to laminated Three-member joint where the central member transfers glass? load to two outer members Four times as strong What is the purpose of a doubler in aircraft structures? What is a disadvantage of fiber-reinforced composites? Provide local reinforcement to large structures Difficulty in repair and inspection What is a lap joint? Why are aluminum alloys preferred for airframe Overlapping sheets joined mechanically or chemically components? What is the faying surface in a joint? High strength-to-weight ratio The mating surface between two structural members What characteristic is crucial for materials in highly What is a joint centroid? stressed parts of an aircraft? Intersection of all axes of symmetry of fasteners in a Fatigue strength and crack resistance plane What is the purpose of edge joints in aircraft? What is a splice used for in aircraft structures? Fasten sheets where load stresses are not important To transfer load across a gap or cutout What is an example of fiber-reinforced composite use in What does edge margin represent? aircraft? Distance from the center of a hole to the edge of a part Structural reinforcement in wings What is another term for in-line rows of fasteners? What is a key property of plastic used in aircraft? Box or chain pattern Useful as electrical insulators and shields What does pitch measure in fastener rows? What alloying element in aluminum provides the highest Distance between the centers of adjacent fasteners in a strength? row Zinc and magnesium What defines staggered rows of fasteners? Which material superseded steel for most aircraft Rows forming angles other than 90 degrees with the structures? joint centerline Aluminum alloys What is an eccentric joint load? What is the main advantage of titanium over aluminum? Load not passing through the centroid of the fastener Higher resistance to fatigue and wear pattern Why is laminated glass commonly used in aircraft What is the function of a shear tie? windows? To transfer shear loads between structural parts Resistant to high-pressure conditions What are shims used for in structures? What is a disadvantage of using composite materials? To fill gaps between adjacent structures High manufacturing and repair costs What differentiates a structural shim from a non-structural What is a critical property of aluminum alloys for aviation shim? use? Structural shims create a load path with fasteners Resistance to fast crack propagation What describes a welded butt joint? Why is zinc added to aluminum alloys? Two materials joined edge-to-edge Increases strength Why is a single lap joint seldom used in aircraft structures? What is a structural joint? Low resistance to bending and shearing stresses A segment of a structure transferring loads between structural members What is a tee joint used for in aircraft structures? Edge or end of one piece welded to the surface of What is the gross area of a structural member? another Total cross-sectional area including all holes What is the purpose of a corner joint in welding? What is the net area of a structural member? To form a corner, often for box-like structures Minimum cross-sectional area after subtracting holes What material is commonly used for aircraft structural What does "average hole diameter" simplify? skins? Determination of the hole area of a countersunk Aluminum alloy fastener What is the most important consideration for material selection in aircraft? Strength-to-weight ratio What are the main groups of materials used in aircraft construction? Wood, steel, aluminum alloy, titanium, fiber composites What is a disadvantage of pure aluminum in structures? Low strength What happens to aluminum alloys when combined with other metals? Properties improve significantly What is a property of the 2nd group of aluminum alloys? Retention of strength at high temperatures What are the primary components in the 3rd group of aluminum alloys? Copper, nickel, zinc, magnesium