eFunda Polymers: Properties of Epoxy {carbon fiber reinforced, sheet molding compound (SMC)}

Generic (ABS, ...) Trade Name


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Calculators

Epoxy	List of Suppliers

Additives:	carbon fiber reinforced
Application:	sheet molding compound (SMC)

Material Properties

Mechanical Properties		Conditions
Mechanical Properties		State 1	State 2	ASTM
Elastic Modulus (MPa)	69000	tensile		D638
Flexural Modulus (MPa)	34500	23 ºC		D790
Tensile Strength (MPa)	276 - 345	at break		D638
Compressive Strength (MPa) at yield or break	207 - 276			D695
Flexural Strength (MPa) at yield or break	518 - 656			D790
Elongation at break (%)	1 - 2			D638
Hardness	55 - 65	Shore B		D638
Izod Impact (J/cm of notch) 1/8" thick specimen unless noted	8.0 - 10.6			D256A

Thermal Properties Conditions

Pressure State ASTM

Coef of Thermal Expansion (10^-6/ºC) 3 D696

Deflection Temperature (ºC) 288 1.82 MPa D648

Thermal Conductivity (W/m-ºC) 0.059 - 0.063 C177

Physical & Electrical Properties Conditions

State ASTM

Specific Gravity 1.6 D792

Water Absorption (% weight increase) 0.1 after 24 hrs D570

Processing Properties Conditions

Type ASTM

Melting Temperature (ºC) thermoset T_m, crystalline

Processing Temperature (ºC) 133 - 166 compression molding

133 - 166 transfer molding

Molding Pressure (MPa) 4 - 14

Compression Ratio 2

Linear Mold Shrinkage (cm/cm) 0.001 D955