MECHANICAL TESTS COMPOSITE LAMINATES
MECHANICAL TESTS COMPOSITE LAMINATES
Composite materials exhibit anisotropic mechanical properties that depend on the type of fiber, its distribution, volume percent, orientation, matrix, fiber-matrix interaction, and manufacturing process.
Composite materials provide almost unlimited design freedom given the infinity of possible combinations between the different fibres, matrices and lay-ups. However, this freedom often translates into lack of representative data for the specific combination required by the project.
The set of these data constitutes the material card, necessary for the designer to model and simulate the component as well as providing a verification element for FEM models.
As the degree of complexity of the simulation increases, in order to reach an acceptable level of predictability of the model, a high quality of input data is required, which must be as representative as possible of the material used for the project
Without a valid materialcard, which forms the basis in the modular pyramid model used in order to characterize a composite material, it is not possible to model/process components who use this material.
The following tests allow to obtain all the mechanical properties necessary to characterize a composite material.
|
TEST TYPE |
METHOD |
PURPOSE OF THE TEST |
|
Traction |
ASTM D3039 UNI EN ISO 6892-1 ASTM D638 ISO 527 ASTM E8
|
Resistance to traction |
|
Traction with contraction |
ASTM D3039
|
Resistance to traction and elastic module |
|
Traction with one dimensional strain gauge |
ASTM D3039 |
Resistance to traction and elastic module with strain gauge
|
|
Traction with bi-dimensional strain gauge |
ASTM D3039 |
Resistance to traction, elastic module and poisson’s ratio
|
|
3 point bending |
ASTM D7264
|
Resistance to bending |
|
Short bending, ILSS °0
|
ASTM D2344 |
Interlaminar cut |
|
Shear test (Fiber traction at ±45°) |
ASTM D3518 |
Maximum shear force and shear modulus with bi-dimensional extensometer
|
|
Cut out of plane |
ASTM D5379 |
Out-of-plane shear strength Out-of-plane shear modulus |
|
Compression |
ASTM D6641 ASTM D3410
|
Resistance to compression |
|
Compression with one dimensional strain gauge |
ASTM D6641 ASTM D3410 |
Resistance to compression Elastic modulus in compression
|
|
Compression with two one dimensional strain gauge |
ASTM D6641 ASTM D3410 |
Resistance to compression Elastic module Deflection chech for buckling
|
|
Compression SACMA |
SACMA SRM-1 |
Ultimate resistance to compression
|
|
Compression SACMA with contraction |
SACMA SRM-1 |
Compression module
|
|
Replenishment |
ASTM D5961 |
Resistance to replenishment
|
|
Almost static indentation |
ASTM D6264 |
Resistance to damages
|
|
Fracture toughness mode I |
ASTM D5528 |
Interlaminar fracture toughness mode I
|
|
Fracture toughness mode II |
ASTM D7905 |
Interlaminar fracture toughness mode II
|
|
Adhesive toughness |
ASTM D3433 |
Adhesive fracture toughness
|
|
Open hole traction |
ASTM D5766 |
Resistance to open hole traction
|
|
Open hole compression |
ASTM D6484 |
Resistance to open hole compression
|