Material Characteristics of Ceramics and Composites Characteristics - - PowerPoint PPT Presentation

▶

Apr 02, 2023 701 likes •818 views

Material Characteristics of Ceramics and Composites Characteristics of Aerospace Materials Materials and Manufacturing Methods Ceramics Properties of ceramics Hard and brittle (limited toughness - small failure strain) High strength and

SLIDE 1

Material Characteristics of Ceramics and Composites

Characteristics of Aerospace Materials

Materials and Manufacturing Methods

SLIDE 2

Ceramics

SLIDE 3

Properties of ceramics

Hard and brittle (limited toughness -

small failure strain)

High strength and stiffness (depends
n composition)
Able to withstand high temperatures
Wear resistant

SLIDE 4

Space Shuttle Columbia

Crashed February 1, 2003
Crew of 7 killed
No apparent problems

during lift-off and mission

Disintegrated during re-

entry

SLIDE 5

Space Shuttle Columbia

Piece of foam detached from

tank, which hits leading edge during lift-off

Foam damaged the heat-

resistant ceramic skin

Hot gases could enter the

wing and affect its structure

SLIDE 6

Composites

SLIDE 7

Carbon fiber-reinforced polymers (CFRPs)

Strong and stiff in tension only
Anisotropic behavior
UD = Unidirectional Composite
Cross ply = fibers in 0o and 90o

SLIDE 8

Two materials working as one

Two distinct, structurally complementary materials Fibers: Reinforce polymer, carry main portion of load Polymer: Support and transfer load to/from fibers in shear

SLIDE 9

Properties of CFRPs

High specific properties (strength

and stiffness)

Approximately elastic until failure

(no ductility)

High directionality: tailorable for

application, multiple orientations required to cope with loading

SLIDE 10

Hybrid materials (GLARE)

Metal: Provides ductility, isotropic strength/stiffness Fibers: Reinforces polymer, carries significant portion of load Polymer: Transfers load between fibers and metal in shear