1 Scope
This International Standard describes a procedure
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— to verify the degree of misalignment of the load train of the test machines using a reference test specimen uniformly loaded in tension or in compression, and
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— to give indications in order to correct defects such as torsion and bending.
This International Standard is not intended to provide a quantitative and acceptable
limit before the testing of ceramic matrix composites with a fibre reinforcement:
unidirectional (1D), bidirectional (2D), and tridirectional (xD, with 2 < x ≤ 3) loaded along one principal axis of reinforcement. This limit depends on the
sensitivity of each type of composite to the misalignment defect.
NOTE 1 This limit is to be defined between the testing establishment and the customer.
NOTE 2 Monolithic ceramics are very sensitive to misalignment defects while CMCs (ceramic matrix composite) in general are moderately sensitive to them.