NBN ISO 12817:2025

< p class=" MsoBodyText" > < span lang=" EN-GB" > This document 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 document applies to all textile diameter fibre types (carbon, glass, aramids, etc.) and matrices (e.g. thermoset, thermoplastic) that meet the requirements of this document.< / span>

< p class=" MsoBodyText" > < span lang=" EN-GB" > This document includes three methods:< / span>

< p class=" ListContinue1" style=" mso-list: l0 level1 lfo1 " > < !-- [if !supportLists]--> < span lang=" EN-GB" style=" mso-fareast-font-family: Cambria mso-bidi-font-family: Cambria " > < span style=" mso-list: Ignore " > —< span style=" font: 7.0pt ' Times New Roman' " >      < / span> < / span> < / span> < !--[endif]--> < span lang=" EN-GB" > method 1 (short specimen with support fixture) < / span>

< p class=" ListContinue1" style=" mso-list: l0 level1 lfo1 " > < !-- [if !supportLists]--> < span lang=" EN-GB" style=" mso-fareast-font-family: Cambria mso-bidi-font-family: Cambria " > < span style=" mso-list: Ignore " > —< span style=" font: 7.0pt ' Times New Roman' " >      < / span> < / span> < / span> < !--[endif]--> < span lang=" EN-GB" > method 2 (short specimen without support fixture) < / span>

< p class=" ListContinue1" style=" mso-list: l0 level1 lfo1 " > < !-- [if !supportLists]--> < span lang=" EN-GB" style=" mso-fareast-font-family: Cambria mso-bidi-font-family: Cambria " > < span style=" mso-list: Ignore " > —< span style=" font: 7.0pt ' Times New Roman' " >      < / span> < / span> < / span> < !--[endif]--> < span lang=" EN-GB" > method 3 (long specimen with support fixture as in ASTM D6484/ D6484M-09, methods A and B).< / span>

< p class=" MsoBodyText" > < span lang=" EN-GB" > Method 1 employs an L-shaped base fixture and two end fixtures. These end fixtures are compressed between the platens of the test machine.< / span>

< p class=" MsoBodyText" > < span lang=" EN-GB" > Method 2 employs end supports similar to the fixtures given in ISO 14126:2023, D.1. This method 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< / span>

< p class=" MsoBodyText" > < span lang=" EN-GB" > 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.< / span>

< p class=" Note" > < span lang=" EN-GB" > NOTE< span style=" mso-tab-count: 1 " >             < / span> Specimen configurations and force introduction varies for the three methods covered within this document. Results obtained using methods 1, 2 and 3 might not be equivalent for all laminates in all environments.< / span>