ISO 17851:2016

Overview - ISO 17851:2016 (Space environment simulation for material tests)

ISO 17851:2016 defines general principles and criteria for simulating the space environment during material tests. It describes the space environment components that affect spacecraft in different regions and the physical/chemical processes that cause material degradation, including synergistic effects. The standard sets out methodology for selecting environment components and characteristics for ground-based tests, and establishes requirements for laboratory test facilities, and for physical and mathematical models used to assess space environment impacts on materials.

Keywords: ISO 17851:2016, space environment simulation, material tests, spacecraft materials, laboratory test facilities, space systems standard.

Key topics and technical requirements

ISO 17851:2016 covers technical subjects required to design and interpret material testing for space use including:

• Terms and definitions for space regions, orbits, and environment factors.
• Choice of environment components by orbit/region (LEO, MEO, GSO/GEO, interplanetary, Moon, Mars, Jupiter, Mercury, Venus).
• General simulation processes and principles for ground-based testing and test planning.
• Requirements for physical and mathematical models used to predict material response and environment interactions.
• Selection of laboratory facility parameters and test conditions to reproduce relevant space factors.
• General criteria of material resistance including functional purpose, pass/fail considerations, and assessment approaches.
• Specific test-type guidance and limitations for: UV, VUV, atomic oxygen (AO), outgassing, thermal vacuum/cycling, ionizing radiation, and micrometeoroid/hypervelocity impact tests.
• Recommendations, annexes and models - informative annexes list environment factors, parameters and mathematical models for spacecraft/environment interaction.

Practical applications

ISO 17851:2016 is a practical reference for:

• Designing spacecraft and selecting materials resistant to space degradation.
• Planning and conducting ground-based space environment simulations (thermal vacuum, AO, UV/VUV, radiation, outgassing, impact testing).
• Forecasting spacecraft lifetime and assessing in-orbit durability.
• Interpreting test results through validated physical and mathematical models and understanding test coverage and limitations.
• Informing standards development by identifying gaps in existing specific test standards.

The standard explicitly notes it can be used as a reference document in spacecraft design, lifetime forecasting, ground testing, and operational material-change analysis.

Who should use ISO 17851:2016

• Spacecraft systems and materials engineers
• Environmental test laboratory managers and technicians
• Reliability, mission assurance and materials research teams
• Standards developers and test method authors
• Program managers planning long-duration missions or new-orbit deployments

Related standards

ISO 17851:2016 complements specific ISO/IEC and national standards for test apparatus and procedures (thermal vacuum, radiation, outgassing, hypervelocity impact). Use ISO 17851:2016 as a high-level guide to select and combine the appropriate specific test standards for a given mission or material evaluation.