Overview
ISO 15828:2004 - Road vehicles: Offset frontal impact test procedure defines a full‑scale, reproducible test method for frontal offset deformable barrier impacts. Applicable to passenger cars and light trucks (as defined in ISO 3833) with instrumented dummies in front outboard seats, the standard sets conditions for test facilities, deformable barrier construction and calibration, vehicle preparation, dummy installation, instrumentation and data capture so that offset frontal crash tests are conducted consistently and comparably.
Key topics and requirements
- Test scope: Full‑scale offset frontal impact using a deformable barrier; first contact on the steering‑wheel side and prescribed vehicle overlap.
- Test site and vehicle propulsion: Horizontal, smooth hard surface; vehicle released to travel freely and impact at a prescribed velocity (tight tolerances on speed and alignment).
- Deformable barrier design: Detailed geometry and materials for the main deformable block, bumper element, backing, cladding and facing sheets (e.g., block width 1000 mm, height 650 mm, depth 450 mm) and requirement for supplier calibration (conformance analysis referenced to NHTSA TP‑214D).
- Vehicle preparation and mass: Procedure to calculate and ballast test mass, fuel and liquid handling, seating and restraint system settings, tyre pressures and ride attitude to ensure repeatability.
- Dummies and clothing: Use of dummies conforming to ISO/TR 12349‑1 with specified garments and shoes (referenced to FMVSS 208 equivalents) and controlled dummy temperature/humidity.
- Instrumentation & measurements: Data acquisition and photographic documentation per ISO 6487, ISO 8721 and SAE J211; required channels include head accelerations, neck forces/moments, thorax deflection, femur/tibia loads and vehicle accelerations/speed. Visual marking of head and knee contacts for post‑test analysis.
- Tolerances and alignment: Specified angular and positional tolerances for impact angle, overlap and barrier installation to ensure consistent impact conditions.
Applications and users
- Automotive OEM crash test engineers validating frontal crashworthiness and occupant protection.
- Independent test laboratories conducting certification, compliance or comparative safety assessments.
- Regulatory bodies and NCAP programs using standardized offset impact procedures for rating and rulemaking.
- Barrier suppliers and calibration services ensuring deformable face conformance.
- Researchers and suppliers of restraint systems, airbags and vehicle structure components optimizing designs for real‑world offset impacts.
Related standards
- ISO 3833 (vehicle types and definitions)
- ISO 6487, ISO 8721 (impact measurement techniques)
- ISO/TR 12349‑1 (dummies)
- SAE J211 series (impact instrumentation)
- FMVSS 208, NHTSA TP‑214D (guidance on dummies, barrier calibration and procedures)
ISO 15828:2004 is essential for consistent, reproducible offset frontal crash testing-supporting safer vehicle design, regulatory compliance and comparable crash performance data.