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Composite materials engineering webinar session 6 - Manufacturing processes - Prepreg processing - A125

From CKN Knowledge in Practice Centre
Perspectives - A8AIM Events - Webinars - A115Composite materials engineering webinar series - A119Composite materials engineering webinar session 6 - Manufacturing processes - Prepreg processing - A125
 
Composite materials engineering webinar session 6 - Manufacturing processes - Prepreg processing
Perspectives article
A125 Video Thumbnail Image-8h6tDKTG7sc5.jpg
Document Type Article
Document Identifier 125
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Webinar Date
  • July 21, 2020

Introduction[edit | edit source]

This session provides an introduction and overview of prepreg materials which are composed of fiber and partially cured resin that is combined at a specific, tightly controlled ratio. It is the most common form of material used in aerospace and is quite common for sports equipment. This session goes into more detail on prepreg materials and the processes used to manufacture parts with them.

Webinar[edit | edit source]

Webinar slides[edit | edit source]

Webinar slides available by clicking on the icon below

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Additional information for select chapters[edit | edit source]

Chapter Chapter Title Links to related information in the Knowledge in Practice Centre
1 Welcome & introductions N/A
2 Overview of Webinar Series
3 What is Prepreg? Future content
4 Example: Prepreg material label N/A
5 Converting from weight fraction to volume fraction Future content
6 Calculating the thickness of an individual ply Future content
7 Manufacturing process: Solvated prepreg N/A
8 Manufacturing process: Hot melt prepreg N/A
9 Deconstructed prepreg appearance (after burn-off) N/A
10 Prepreg internal structure Future content
11 Prepreg internal structure: Resin rich & dry areas Future content
12 Prepreg internal structure: CT image N/A
13 Interlayer toughened prepregs Future content
14 Out of autoclave (OoA) prepreg Future content
15 What happens to prepreg during cure Future content
16 Viscosity and Modulus development during cure
17 Video of resin flow in a prepreg N/A
18 Impregnation mechanisms and resin flow Future content
19 Sources and sinks of porosity Future content
20 Different types of porosity Future content
21 Porosity in out of autoclave prepregs Future content
22 Storage and handling of prepreg Future content
23 Controlling moisture during storage and handling Future content
24 Recieving quality inspection techniques Future content
25 Properties that affect prepreg material deposition Future content
26 Material deposition of prepreg: Hand layup Future content
27 Material deposition of prepreg: Hand layup (OoA) Future content
28 Dubulking Future content
29 Comparison of uncompacted and compacted fibre-bed Future content
30 Progression of debulking through time Future content
31 Resin flow during debulk Future content
32 Material deposition of prepreg: ATL/AFP Future content
33 ATL/AFP: Material coverage considerations Future content
34 ATL/AFP: Laps and gaps Future content
35 ATL/AFP: Fibre misalignment Future content
36 Material deposition of prepre: Drape forming Future content
37 Drape forming: Bending of uncured plies Future content
38 Drape forming: Common Defects Future content
39 Wrap-up N/A
40 Q&A N/A


Related pages

Page type Links
Introduction to Composites Articles
Foundational Knowledge Articles
Foundational Knowledge Method Documents
Foundational Knowledge Worked Examples
Systems Knowledge Articles
Systems Knowledge Method Documents
Systems Knowledge Worked Examples
Systems Catalogue Articles
Systems Catalogue Objects – Material
Systems Catalogue Objects – Shape
Systems Catalogue Objects – Tooling and consumables
Systems Catalogue Objects – Equipment
Practice Documents
Case Studies
Perspectives Articles



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Welcome

Welcome to the CKN Knowledge in Practice Centre (KPC). The KPC is a resource for learning and applying scientific knowledge to the practice of composites manufacturing. As you navigate around the KPC, refer back to the information on this right-hand pane as a resource for understanding the intricacies of composites processing and why the KPC is laid out in the way that it is. The following video explains the KPC approach:

Understanding Composites Processing

The Knowledge in Practice Centre (KPC) is centered around a structured method of thinking about composite material manufacturing. From the top down, the heirarchy consists of:

The way that the material, shape, tooling & consumables and equipment (abbreviated as MSTE) interact with each other during a process step is critical to the outcome of the manufacturing step, and ultimately critical to the quality of the finished part. The interactions between MSTE during a process step can be numerous and complex, but the Knowledge in Practice Centre aims to make you aware of these interactions, understand how one parameter affects another, and understand how to analyze the problem using a systems based approach. Using this approach, the factory can then be developed with a complete understanding and control of all interactions.

The relationship between material, shape, tooling & consumables and equipment during a process step


Interrelationship of Function, Shape, Material & Process

Design for manufacturing is critical to ensuring the producibility of a part. Trouble arises when it is considered too late or not at all in the design process. Conversely, process design (controlling the interactions between shape, material, tooling & consumables and equipment to achieve a desired outcome) must always consider the shape and material of the part. Ashby has developed and popularized the approach linking design (function) to the choice of material and shape, which influence the process selected and vice versa, as shown below:

The relationship between function, material, shape and process


Within the Knowledge in Practice Centre the same methodology is applied but the process is more fully defined by also explicitly calling out the equipment and tooling & consumables. Note that in common usage, a process which consists of many steps can be arbitrarily defined by just one step, e.g. "spray-up". Though convenient, this can be misleading.

The relationship between function, material, shape and process consisting of Equipment and Tooling and consumables


Workflows

The KPC's Practice and Case Study volumes consist of three types of workflows:

  • Development - Analyzing the interactions between MSTE in the process steps to make decisions on processing parameters and understanding how the process steps and factory cells fit within the factory.
  • Troubleshooting - Guiding you to possible causes of processing issues affecting either cost, rate or quality and directing you to the most appropriate development workflow to improve the process
  • Optimization - An expansion on the development workflows where a larger number of options are considered to achieve the best mixture of cost, rate & quality for your application.