ISO 12817:2012 pdf download.Fibre-reinforced plastic composites一Determination of open-hole compression strength.
ISO 12817 specifies the test method to determine the open-hole compressive strength of laminated fibre-reinforced plastic composites. The laminate is intended to be a balanced and symmetrical lay-up or be otherwise homogeneous through the thickness. This International Standard applies to all textile diameter fibre types (carbon, glass, aramids, etc.) and matrices (e.g. thermoset, thermoplastic) that meet the requirements of this International Standard.
ISO 12817 includes three methods:
— method 1 (short specimen with support fixture);
— method 2 (short specimen without support fixture);
— method 3 (long specimen with support fixture as in ASTM D6484/D6484M-09, methods A and B).
Method 1 employs an L-shaped base fixture and two end fixtures. These end fixtures are compressed between the platens of the test machine.
Method 2 employs end supports similar to the fixtures given in C.1 of ISO 141 26:1999. Method 2 is useful for cyclic loading conditions test, including under fully or partly reversed loading conditions when the specimen is clamped by hydraulic grips without support fixtures
Method 3 has two types of loading methods, i.e. 3A and 3B. In method 3A, the specimen is placed within a stabilization fixture, which is then clamped by hydraulic grips. In method 3B, the specimen is placed within a stabilization fixture and then end-loaded by platens. Full details of test methods 3A and 3B are given in ASTM D6484/D6484M-09, procedure A and procedure B, respectively.
NOTE Specimen configurations and force introduction varies for the three methods covered within this International Standard. Results obtained using methods 1, 2 and 3 might not be equivalent for all laminates in all environments.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable to its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 291, Plastics — Standard atmospheres for conditioning and testing
ISO 472, Plastics — Vocabulary
ISO i 268 (all parts), Fibre-reinforced plastics — Methods of producing test plates
ISO 2818, Plastics — Preparation of test specimens by machining
ISO 5893, Rubber and plastics test equipment — Tensile, flexural and compression types (constant rate of traverse) — Specification
ISO 14126:1999, Fibre-reinforced plastic composites — Determination of compressive properties in the in- plane direction
3 Terms and definitions
For the purposes of this document, the terms and definitions given in Iso 472 and the following apply.
3.1
open-hole diameter
diameter of the open hole in the centre of the test specimen
Note I to entry: Open-hole diameter is expressed in millimetres (mm).
Note 2 to entry: See Figure 1.
3.2
width
w
overall width of the specimen
Note 1 to entry: Width is expressed in millimetres (mm).ISO 12817 pdf download.