ISO 13586:2018 PDF

Scope: This document specifies the principles for determining the fracture toughness of plastics in the crackopening mode (mode I) under defined conditions. Two test methods with cracked specimens are defined, namely three-point-bending tests and compact-specimen tensile tests in order to suit different types of equipment available or different types of material. The methods are suitable for use with the following range of materials, including their compounds containing short fibres of the length ≤ 7,5 mm: — rigid and semi-rigid thermoplastic moulding, extrusion and casting materials; — rigid and semi-rigid thermosetting moulding and casting materials. In general, short fibre lengths of 0,1 mm to 7,5 mm are known to cause heterogeneity and anisotropy in the crack tip fracture process zone. Therefore, where relevant, Annex B offers some guidelines to extend the application of the same testing procedure, with some reservations, to rigid and semi-rigid thermoplastic or thermosetting plastics containing such short fibres. Certain restrictions on the linearity of the load-displacement diagram, on the specimen width and on the thickness are imposed to ensure validity (see 6.4) since the scheme used assumes linear elastic behaviour of the cracked material and a state of plane strain at the crack tip. Finally, the crack needs to be sharp enough so that an even sharper crack does not result in significantly lower values of the measured properties.

ISO 13586:2018 Referenced Document

ISO 2818:1994 Plastics - Preparation of test specimens by machining
ISO 527-1:2012 Plastics - Determination of tensile properties - Part 1: General principles
ISO 604:2002 Plastics - Determination of compressive properties
ISO 7500-1:2018 Metallic materials - Calibration and verification of static uniaxial testing machines - Part 1: Tension/compression testing machines - Calibration and verification of the force-measuring system
ISO 9513:2012 Metallic materials - Calibration of extensometer systems used in uniaxial testing

2018 ISO 13586:2018 Plastics - Determination of fracture toughness (GIC and KIC) - Linear elastic fracture mechanics (LEFM) approach
2003 ISO 13586:2000/Amd 1:2003 Plastics - Determination of fracture toughness (G<(Index)IC> and K<(Index)IC>); Linear elastic fracture mechanics (LEFM) approach - Amendment 1: Guidelines for the testing of injection-moulded plastics containing discontinous reinforcing fibres
2000 ISO 13586:2000 Plastics - Determination of fracture toughness (G<(Index)IC> and K<(Index)IC>) - Linear elastic fracture mechanics (LEFM) approach

$Plastics - Determination of fracture toughness (GIC and KIC) - Linear elastic fracture mechanics (LEFM) approach$