Norma Técnica
Código
ISO 178:2010 Amd 1:2013  
Data de Publicação : 01/04/2013
Título : ISO 178:2010/Amd 1:2013
Título Idioma Sec. : Plastiques -- Détermination des propriétés en flexion
Comitê : ISO/TC 61 Plastics
Páginas : 8
Status : Em Vigor  
Idioma : Inglês
Organismo : ISO - International Organization for Standardization
Preço (R$) : 41,60
Objetivo : ISO 178:2010 specifies a method for determining the flexural properties of rigid and semi-rigid plastics under defined conditions. A standard test specimen is defined, but parameters are included for alternative specimen sizes for use where appropriate. A range of test speeds is included. The method is used to investigate the flexural behaviour of the test specimens and to determine the flexural strength, flexural modulus and other aspects of the flexural stress/strain relationship under the conditions defined. It applies to a freely supported beam, loaded at midspan (three-point loading test). The method is suitable for use with the following range of materials: thermoplastic moulding, extrusion and casting materials, including filled and reinforced compounds in addition to unfilled types; rigid thermoplastics sheets; thermosetting moulding materials, including filled and reinforced compounds; thermosetting sheets. ISO 178:2010 applies to fibre-reinforced compounds with fibre lengths less than or equal to 7,5 mm prior to processing. For long-fibre-reinforced materials (laminates) with fibre lengths greater than 7,5 mm, see ISO 14125. The method is not normally suitable for use with rigid cellular materials or sandwich structures containing cellular material. In such cases, ISO 1209‑1 and/or ISO 1209‑2 can be used. Contrary to the previous editions of this International Standard, this edition specifies two methods, method A and method B. Method A is identical to the method in previous editions of this International Standard, i.e. it uses a strain rate of 1 %/min throughout the test. Method B uses two different strain rates: 1 %/min for the determination of the flexural modulus and 5 %/min or 50 %/min, depending on the ductility of the material, for the determination of the remainder of the flexural stress-strain curve.
Normas Necessárias para a aplicação da ISO 178:2010 Amd 1:2013
ICS/CIN
83.080.01 - Plásticos em geral
Palavras-Chave
 
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