ISO 18437-2:2005/Amd 1:2010

Overview

ISO 18437-2:2005/Amd 1:2010 is an important international standard published by ISO that focuses on the characterization of the dynamic mechanical properties of visco-elastic materials using the resonance method. This amendment refines the original 2005 edition and is part of a broader series addressing mechanical vibration and shock testing.

The resonance method specified in this standard is designed to accurately evaluate how visco-elastic materials respond dynamically under vibrational stress, a critical factor for materials used in shock and vibration isolation, damping applications, and other advanced engineering uses.

Key Topics

• Resonance Method for Dynamic Characterization: The amendment updates procedures to measure resonance peaks and phase angles to identify mechanical properties related to vibration response.
• Test Setup and Apparatus: Inclusion of schematic diagrams describing essential equipment like electro-dynamic vibration generators, accelerometers, charge amplifiers, and environmental chambers ensures consistent testing environments.
• Material Sample Requirements: Specifications on test specimen dimensions, including uniform square or circular cross-sections with defined lengths and lateral dimensions, refine sample preparation guidelines.
• Temperature Range Adjustments: The amendment expands testing conditions to include lower temperature limits (down to −60 °C), reflecting real-world environmental exposure.
• Definitions and Parameters: New definitions, such as relaxation time and refined interpretation of frequency response functions (acceleration ratio and phase angle), improve clarity in measuring and analyzing visco-elastic behavior.
• Measurement and Data Analysis: Guidance on observing resonance patterns in the kilohertz region supports precise identification of material damping and stiffness parameters.

Applications

ISO 18437-2:2005/Amd 1:2010 is essential for industries and researchers focused on:

• Automotive and Aerospace Engineering: Ensuring components made from visco-elastic materials effectively reduce vibration and shock loads.
• Material Science and R&D: Developing new polymers, rubbers, and composites with tailored dynamic mechanical properties.
• Acoustic and Vibration Control: Designing isolators, mounts, and pads that rely on accurate mechanical property data obtained through resonance testing.
• Quality Assurance and Compliance: Establishing standardized procedures for product testing to meet regulatory and client specifications globally.
• Environmental Testing: Evaluating material performance across temperature extremes, including very low temperatures down to −60 °C.

Related Standards

ISO 18437 series covers a comprehensive approach to visco-elastic material testing, with related parts and projects including:

• Part 1: Principles and guidelines (under preparation) - Provides overarching methodology and criteria for dynamic property characterization.
• Part 3: [Other characterization methods] - Complementary methods expanding the range of property measurements.
• Part 4: Dynamic stiffness method - Focuses on stiffness measurement techniques relevant to vibration isolation.
• Part 5: Poisson's ratio measurement - Uses combined experimental and finite element analyses for determining Poisson's ratio.
• Additional methods under development - Including the impedance method for further resonance parameter analysis.

Summary

ISO 18437-2:2005/Amd 1:2010 refines and advances the resonance method to dynamically evaluate visco-elastic materials' mechanical properties under vibration. It is an indispensable guideline for manufacturers, engineers, and scientists working with vibration-damping materials, ensuring accurate, reliable, and globally recognized test results.

Keywords: ISO 18437-2, dynamic mechanical properties, resonance method, visco-elastic materials, mechanical vibration, shock testing, vibration isolation, damping materials, temperature testing, material characterization ISO standards