Presentation is loading. Please wait.

Presentation is loading. Please wait.

Instructor: Prof. Yasser Gowayed

Similar presentations

Presentation on theme: "Instructor: Prof. Yasser Gowayed"— Presentation transcript:

1 Instructor: Prof. Yasser Gowayed
Knowledge based problems Fibrous composites Instructor: Prof. Yasser Gowayed Used with permission

2 Lecture outline Definition of composite materials
Types of composite materials Fibrous composites Textile composites

3 Definition Composite materials are made by mixing two or more distinct materials, having a macroscopically recognizable interface

4 Types of Composite Materials
Type of inclusion spheres, rods, fibers, flakes Type of material - Polymer Matrix Composites (PMC) - Ceramic Matrix Composites (CMC) - Metal Matrix Composites (MMC)

5 Fibrous Composites Fibers: strong and flexible Matrix: rigid and inert


7 Textile Composite (3D XYZ woven)
Fibrous Composites Laminated Composites Textile Composite (3D XYZ woven)


9 Terminology – naming convention for laminated composites
Common industry practice to use angles to name layers: 0, 45, -45, 90 Laminates with similar number of like orientations share similar properties Naming convention: (0/45/90/90/-45/-0) (0/45/90)s

10 Terminology – balance and symmetery
Balanced laminate implies that for every + oriented layer there exists a - oriented layer of the same material (45,0,90,-45,0,90) balanced, un-symmetric (45,0,90,-45,90,0,45) unbalanced, symmetric (10,0,45,-45,-10,30,-30) balanced, un-symmetric (45,-45,0,90,0,-45,45) balanced, symmetric

11 The rule of mixtures The density of any composite is the product of the density of its constituents relative to their volume fraction rc= Vf * rf + Vm* rm Vf + Vm = 1 rc = composite density rf = fiber density rm = matrix density Vf = volume fraction of fibers Vm = volume fraction of matrix

12 Composite manufacturing – Compression molding
Fiber/matrix layers

13 Composite manufacturing - Vacuum bagging

14 Composites in Sports

15 Composites in Transportation

16 Composites in Space

17 International Space Station
Altitude: 220 n.m. (nominal) Inclination: 51.6 degrees Dimension: 290 ft (L) x 356 ft (W) Weight:: 940,000 lb Pressurized Volume: 43,000ft3 Power: 110 kW (total); 45kW (users) Final Configuration 2004

18 Textile CMC Turbine Engines
Enabling Propulsion Materials (EPM) CMC Combustor - Lifing & Sub-element Tests Textile CMC Turbine Engines NASA Glenn, Pratt &Whitney and GE

Download ppt "Instructor: Prof. Yasser Gowayed"

Similar presentations

Ads by Google