Application of Advanced Composites to Helicopter Structures Design for Manufacturing Nothing can replace hands on shop experience as a prerequisite to.

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Presentation transcript:

Application of Advanced Composites to Helicopter Structures Design for Manufacturing Nothing can replace hands on shop experience as a prerequisite to good composite design. Without it, the design approach is based on intuition and theory alone, or at best, guided by manufacturing engineers. “A good design is unacceptable if it is unaffordable.” Introduction 1

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 2 Material Selection: Tape -vs- Fabric

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 3 Cocuring Assembly Examples

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 4 Secondary Bonding Assembly Examples

Application of Advanced Composites to Helicopter Structures Design for Manufacturing Corners 5

Application of Advanced Composites to Helicopter Structures Design for Manufacturing Part Contour Limitations 6

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 7 Surface Smoothness

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 8 Ply Arrangement Guidelines

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 9 Hole Drilling Guidelines

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 10 Bonded Joint - Failure Modes

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 11 Bonded Joint - Failure Modes (contd.)

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 12 Highly Recommended

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 13 Joint Types

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 14 Affect of Adherened Stiffness on Loads in a Single Lap Joint

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 15 Affect of Joint Length on Sheer Stress in a Single Lap Joint

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 16 The fillet of adhesive plays an important role in joint strength.

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 17 Finite Element Studies Stress Distributions -vs- Joint Type

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 18 Ply Splices and Drop-Offs

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 19 Maximum Taper Rate

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 20 Mechanical Joint Failure Modes

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 21 Mechanical Joint Design

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 22 Fastener Selection for Corrosion Prevention

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 23 Fastener Selection

Application of Advanced Composites to Helicopter Structures Design for Manufacturing Honeycomb Sandwich Construction 24

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 25 Failure Modes for Sandwich Beams Subjected to Loading Normal to the Faces

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 26 Failures may also occur from a combination of two or more of these modes. Modes of Failure

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 27 Honeycomb Sandwich: Edgeband and Attachments

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 28 Examples of Sandwich Attachments

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 29 Honeycomb Sandwich Edge Closure Concepts

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 30 Core Costs

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 31 Core Compressive Strengths

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 32 Core Shear Strengths

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 33 Core Shear Modulus

Application of Advanced Composites to Helicopter Structures Design for Manufacturing 34 Core type has negligible effect on beam stiffness.