Pre crack
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Pre-crack PowerPoint PPT Presentation


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P. Double Cantilever Beam (DCB) test geometry Used to determine mode I failure strength of composite materials. δ. End block. h. Pre-crack. 2h. B. a. P. Beam Theory Method:. (J/m 2 ). End Notch Flexure (ENF) test geometry

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Pre crack

P

Double Cantilever Beam (DCB) test geometry

Used to determine mode I failure strength of composite materials

δ

End block

h

Pre-crack

2h

B

a

P

Beam Theory Method:

(J/m2)


Pre crack

End Notch Flexure (ENF) test geometry

Used to determine mode II failure strength of composite materials

a

P

B

Pre-crack

2h

L

L

Beam Theory Method:

(J/m2)


Pre crack

Mixed-mode (I/II) Interlaminar Fracture test geometry

Used to determine mixed mode interlaminar failure strength of composite materials

B

L

a

P

δ

Pre-crack

2h

Mixed-mode fracture Energy:

(J/m2)


Pre crack

Single Cantilever Beam (SCB) test geometry

Used to determine skin debonding energy for thick skinned composite sandwich structures

B

Clamp

P

Core material

Pre-crack

Clamp

a

Mixed-mode fracture Energy:

(J/m2)


Pre crack

Centre Notch Flexure (CNF) test geometry

Used to determine skin debonding energy for thin skinned composite sandwich structures

B

P

P

Hole

δ

Pre-crack

a

Mixed-mode fracture Energy:

(J/m2)


Pre crack

Interlaminar Shear Strength (ILSS) test geometry

Standardised three point bend test used to determine interlaminate shear strength for composite structures

P

B

10mm

δ

2mm

20mm

Interlaminate Shear Strength:

(J/m2)


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