1.1 This Standard specifies the test conditions for the determination of the tensile
properties of unidirectional fibre-reinforced plastic composites, based upon the general
principles given in JIS K 7161.
1.2 The test method is for obtaining tensile strength, modulus of elasticity in tension
and tensile stress-strain characteristics under the fixed condition from the tensile
behaviour using test specimens.
1.3 The test method is suitable for all polymer matrix systems reinforced with uni-
directional fibres.
The method is suitable for composites with either thermoplastic or thermosetting
matrices, including preimpregnated materials (prepregs). The reinforcements covered
include carbon fibres, glass fibres, aramid fibres and other similar fibres. The rein-
forcement geometries of unidirectional fibres covered include rovings and unidirectional
fabrics and tapes.
The method is not normally suitable for multidirectional materials composed of sev-
eral unidirectional layers at different angles (see JIS K 7164).
1.4 The method is performed using one of two different types of test specimen, de-
pending on the direction of the applied stress relative to the fibre direction (see clause 6).
1.5 In this test method, the standard dimension of the test specimen is specified, be-
cause test results obtained using test specimens having different dimensions or the test
specimens prepared under the different conditions can not be compared with each other.
Other factors, for example, such as test speed or conditioning of the test specimen also
have effects on the result. Therefore, when the comparable data is requested, these
factors shall be carefully controlled and recorded.
NOTE: The International Standard corresponding to this Standard and the symbol
of degree of correspondence are as follows.
ISO 527-5: 1997 Plastics--Determination of tensile properties Part 5: Test
conditions for unidirectional fibre-reinforced plastic composites (MOD)