ISO 458-1-1985 Plastics Determination of stiffness in torsion of flexible materials Part 1 General method《塑料 柔性材料扭曲刚度的测定 第1部分 一般方法》.pdf

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1、 LL Norme internationale 458/I INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONMEXYHAPOHAR OPTAHM3AklR fl0 CTAHAPTt43AklbWORGANlSAilON INTERNATIONALE DE NORMALlSATiON Plastiques - Determination de la rigidit en torsion des plastiques souples - Partie 1 : M b est la largeur moyenne , en millimetres, d

2、e (plus grande dimension de la section droite); Ieprouvette b) identification complete du produit comprenant le nom, le numero de code ou de stock, la date de fabrication, la forme, etc.; d est Iepaisseur moyenne, en millimetres, (plus petite dimension de la section droite); Ieprou c) dimensions nom

3、inales (ante, largeur, e paisseur); de leprouvette (longueur travail- p est la valeur du rapport b/d; le tableau donne les valeurs de p pour les differentes valeurs du rapport b/d (les valeurs intermediaires peuvent etre trouvees par interpolation); d) details Iessai; de conditionnement de Ieprouvet

4、te avant 9 est Iangle de torsion, en degres; milieu calorifique utilise; 917 est une (dangle); constante dimensionnelle, degres f) tableau des donnees angle, rigidite en torsion); et des resultats (temperature, k est un facteur, exprime en degres par milli dependant des dimensions de Ieprouvette. cu

5、be, g) diagramme du logarithme de la valeur moyenne sur les deux eprouvettes de la rigidite en torsion en fonction de la temperature (si une large gamme de temperatures a ete II est recommande d utiliser Iequation modi free dans le cas ou plusieurs essais sont effect& sur la meme eprouvette. utilisee). 4 Page blanche Page blanche

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