ISO 12680-1:2005 PDF

Name: ISO 12680-1:2005 — Methods of test for refractory products — Part 1: Determination of dynamic Young's modulus (MOE) by impulse excitation of vibration
SKU: ISO 12680-1:2005
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Methods of test for refractory products — Part 1: Determination of dynamic Young's modulus (MOE) by impulse excitation of vibration

Название (английский):

ISO 12680-1:2005

Methods of test for refractory products — Part 1: Determination of dynamic Young's modulus (MOE) by impulse excitation of vibration

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 11
Дата публикации:: 20 июня 2005 г.
Издание:: ISO IS 12680 edition 1 version 1
ICS:: 81.080

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Описание (английский):

ISO 12680-1:2005 specifies a method for determining the dynamic Young's modulus of rectangular cross-section bars and circular cross-section specimens of refractories by impulse excitation of vibration. The dynamic Young's modulus is determined using the resonant frequency of the specimen in its flexural mode of vibration.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 12680-1:2005 specifies a standardized, non‑destructive test method for determining the dynamic Young’s modulus (MOE) of refractory materials by impulse excitation of vibration. The method measures the specimen’s fundamental resonant frequency in a flexural mode and converts that frequency, together with specimen mass and geometry, to a dynamic modulus of elasticity. The standard applies to slender rectangular parallelepipeds and cylindrical specimens with regular geometry and homogeneous composition. It notes that the technique can be adapted for high‑temperature testing with suitable equipment changes.

Key topics and technical requirements

Test principle: Single elastic impact (hammer) excites flexural vibration; a transducer (contact or non‑contact) captures the vibration and a signal analyser determines the fundamental resonant frequency.

Specimen geometry: Rectangular or circular cross‑section beams/rods. Minimum length-to-thickness/diameter ratio specified (slender‑rod definition and specimen ratio requirements appear in the document). Surfaces must be flat/parallel; diameter or thickness variation limited to about 1%.

Measurement accuracy: Equipment must measure frequency to about 0.1% accuracy; mass and linear dimensions to 0.2% precision.

Supports and excitation: Specimens supported at nodal points (nodes at 0.224·L from each end for fundamental flexure). Hammer mass should induce measurable vibration without damaging the specimen.

Transducers and frequency range: Typical transducer bandwidth suggested 50 Hz–20 kHz; transducer response must be adequate across the measured range (–3 dB bandwidth considerations).

Sensitivity and limitations: The method assumes homogeneity and regular geometry. Results are sensitive to surface finish and dimensional variation (dynamic modulus is strongly dependent on thickness - thickness variation significantly affects results). Not suitable for specimens with major cracks or voids.

Procedure elements: Sampling per ISO 5022 / ISO 8656‑1, stabilization and calibration of equipment, verification with reference specimen, calculation and test reporting requirements.

Applications and users

Practical uses: refractory characterization, R&D, production quality control, acceptance testing and comparative material evaluation.

Typical users: refractory manufacturers, materials engineers, testing laboratories, quality assurance teams and researchers working on ceramic and high‑temperature materials.

Benefits: Non‑destructive, fast, low‑strain measurement near the origin of the stress–strain curve; allows testing of specimens prepared for other tests.

Related standards

ISO 5022:1979 - sampling and acceptance testing for shaped refractories

ISO 8656‑1:1988 - sampling of raw and unshaped refractory products

ISO 12680 (Part 2 under preparation) - Determination of static modulus of elasticity

Keywords: ISO 12680-1:2005, dynamic Young’s modulus, MOE, impulse excitation of vibration, refractories, resonant frequency, flexural mode, non‑destructive testing, transducer, signal analyser.

ISO 12680-1:2005 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 5022:1979

Shaped refractory products — Sampling and acceptance testing

ISO 8656-1:1988

Refractory products — Sampling of raw materials and unshaped products — Part 1: Sampling scheme

SIST ISO 502:2016

Coal - Determination of caking power - Gray-King coke test

BS EN ISO 12680-1:2007

Methods of test for refractory products. Determination of dynamic Young´s modulus (MOE) by impulse excitation…