Day 5 Progress Check

Question 1

Why are bonded flush patch repairs particularly challenging in solid laminate structures?

Answer 1

They require precise control and cleanliness due to difficulty of inspection.

Question 2

When preparing a patch for a bolted repair, why is it important to follow SRM guidelines accurately?

Answer 2

To ensure the patch aligns with structural load paths and maintains integrity

Question 3

During the step-by-step repair process, why is it important to remove any moisture before proceeding?

Answer 3

To avoid damage during curing

Question 4

What is the maximum damage size for which filler and potting repairs are applicable in sandwich structures?

Answer 4

0.5 inch

Question 5

Why is the use of non-corrosive fasteners essential in composite repairs, especially with carbon fiber structures?

Answer 5

To prevent galvanic corrosion

Question 6

Which step in the external bonded patch repair process ensures that the repair plies match the original structure?

Answer 6

Laying up repair plies, matching the material and orientation

Question 7

Why is it necessary to use specialized equipment and drill bits for machining composite materials?

Answer 7

To prevent delamination and fiber damage

Question 8

What is the primary reason that composite honeycomb structures are susceptible to damage?

Answer 8

They have a delicate bonded structure with thin face sheets.

Question 9

What is one disadvantage of using bolted repairs in composite structures?

Answer 9

They cause damage from drilling and have limited bearing strength.

Question 10

What is the primary role of high-speed, low-feed rates in cutting composite materials?

Answer 10

To manage the specific challenges of various composite materials

Question 11

Which type of repair is intended to meet strength requirements but is limited by time or usage?

Answer 11

Temporary Repair

Question 12

What is the main difference between interim and permanent repairs in composite structures?

Answer 12

Interim repairs restore strength but not durability; permanent repairs restore both.

Question 13

Which material is commonly used to repair Kevlar® in composite honeycomb structures?

Answer 13

Fiberglass

Question 14

What is the primary purpose of using vacuum bagging during the repair of composite structures?

Answer 14

To pressurize and remove air during curing

Question 15

What is one of the key safety measures emphasized in composite repair to handle hazardous materials?

Answer 15

Wearing personal protective equipment (PPE)