ASTM D6272 Propiedades de Flexión de Materiales Aislantes Eléctricos y Plásticos
El método de ensayo ASTM D6272 especifica las condiciones para determinar las propiedades de flexión de plásticos reforzados / no reforzados y materiales aislantes eléctricos en forma de probetas de barras rectangulares modeladas directamente o cortadas de placas. Para este tipo de ensayo de flexión, recomendamos usar una fijación de 4 puntos de flexión dónde el apoyo superior de la fijación tiene dos puntos de contacto con la probeta que hace que la carga se aplique sobre la misma en 2 puntos equidistantes del punto central. Nuestro accesorio de 4 puntos de flexión dispone de una opción con un apoyo superior de un solo punto de contacto para hacer ensayos de flexión de 3 puntos, tal como está descrito en ASTM D790.
Un accesorio adicional que a menudo se requiere es un deflectómetro (ASTM D6272 especifica un dispositivo de clase C para medir la deflexión). Este dispositivo registra de manera continua y automática la deflexión de la muestra durante el ensayo. Este accesorio se usa mayoritariamente para aplicaciones de flexión y compresión. Los deflectómetros son similares a los extensómetros, que son usados más habitualmente en aplicaciones de tracción.
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