ISO 18437-3:2005 PDF
Mechanical vibration and shock — Characterization of the dynamic mechanical properties of visco-elastic materials — Part 3: Cantilever shear beam method
Mechanical vibration and shock — Characterization of the dynamic mechanical properties of visco-elastic materials — Part 3: Cantilever shear beam method
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 14
- Дата публикации:
- 18 апреля 2005 г.
- Издание:
- ISO IS 18437 edition 1 version 1
- ICS:
- 17.160
ISO 18437-3:2005 defines a cantilever shear beam method for determining from laboratory measurements the dynamic mechanical properties of the resilient materials used in vibration isolators. Common errors due to clamping the specimen are avoided by using fixed ends so there is no rotational motion of the beam at its ends. This part of ISO 18437 is applicable to shock and vibration systems operating from a fraction of a hertz to about 20 kHz. ISO 18437-3:2005 is applicable to resilient materials that are used in vibration isolators in order to reduce -- transmissions of unwanted vibrations from machines, structures or vehicles that radiate sound (fluid-borne, airborne, structure-borne, or other), and -- the transmission of low- frequency vibrations that act upon humans or cause damage to structures or sensitive equipment when the vibration is too severe. The data obtained with the measurement methods that are outlined in ISO 18437-3:2005 are used for -- the design of efficient vibration isolators, -- the selection of an optimum material for a given design, -- the theoretical computation of the transfer of vibrations through isolators, -- information during product development, -- product information provided by manufacturers and suppliers, and -- quality control.
Abstract
Overview
ISO 18437-3:2005 specifies the cantilever shear beam method for laboratory determination of the dynamic mechanical properties of visco‑elastic (resilient) materials used in vibration isolators. The method uses a fixed‑end cantilever shear beam to avoid clamping‑induced errors (no rotational motion at ends) and is applicable to shock and vibration systems from a fraction of a hertz up to about 20 kHz. Results (complex Young’s modulus, loss factor, etc.) support design, selection, modelling and quality control of vibration‑isolation materials and products.
Key topics and technical requirements
- Test principle: sinusoidal shear excitation of a beam specimen with fixed ends (cantilever shear mode) to obtain frequency‑dependent modulus and damping.
- Linearity requirement: measurements assume linear vibrational behaviour at the test strain magnitudes; checks include measuring modulus over a range of input levels.
- Time–temperature superposition: measurements at multiple temperatures (typically stepped by ~5 °C with control ~±0.5 °C) are shifted along the frequency axis to extend the usable frequency range.
- Measured quantities: complex Young’s modulus (real and imaginary parts) and loss factor (tan δ).
- Essential equipment:
- Electro‑dynamic vibration generator (typical range 0.3–30 Hz; force >10 N; amplitude ≈100 µm)
- Force measurement (calibrated; uncertainty
Технические детали
- Технический комитет
- ISO/TC 108 - Mechanical vibration, shock and condition monitoring
- SKU
- ISO 18437-3:2005
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