Overview
ISO/TR 15766:2000 is an International Organization for Standardization Technical Report focused on pedestrian protection. It provides laboratory test procedures and impact-response targets to assess the biofidelity (biomechanical realism) of pedestrian thigh, knee and leg test devices and mathematical models. The targets apply to impacts on either the medial (inside) or lateral (outside) surfaces of the leg. As a Technical Report, it is informative guidance based on cadaver and experimental data rather than a prescriptive standard.
Key Topics and Requirements
- Four principal test types to quantify leg/knee impact response:
- Lateral knee-bending tests at 15 km/h and 20 km/h (impactor mass 40 kg; polystyrene-foam face).
- Lateral knee-shear test at 15 km/h (same 40 kg impactor configuration).
- Lateral knee-impact test at 2.6 m/s using a 74 kg free-mass impactor (measures peak knee force and valgus angle).
- Static lateral knee-stiffness test (loading rate 100 mm/s) to determine stiffness K = F/δ.
- Specific measurable targets:
- Impact-force corridors (time–force corridors) are defined for the bending and shear tests (corridor coordinates given in the report).
- For the 2.6 m/s knee impact: peak knee force 1.2–1.5 kN and maximum valgus angle 25°–31°.
- Lateral knee stiffness at 25 mm medial deflection: 4.0–4.5 N/mm.
- Test instrumentation and measurement conventions:
- Impactor acceleration measured (CFC 180 filtering per ISO 6487) to compute force.
- Medial support loads and impactor velocity recorded; valgus angle determined by film analysis.
- Test hardware details:
- Use of rigid polystyrene-foam blocks (specified dimensions) for impact faces and supports; the report requires new foam blocks for each test and provides foam-response characterization in Annex A.
Applications
- Validation and calibration of pedestrian-leg test devices, surrogate knees, anthropomorphic dummies, and computational human-body models used in pedestrian-impact studies.
- Automotive safety engineering for vehicle front-end design, bumper systems, pedestrian protection countermeasures, and active safety evaluations.
- Regulatory and research laboratories developing biomechanical injury risk assessments and harmonizing test methods across programs.
Who Would Use This
- Automotive crashworthiness engineers and pedestrian safety researchers.
- Test laboratories and certification bodies assessing leg-impact biofidelity.
- Developers of anthropomorphic test devices (ATDs), finite-element human models, and protective devices (e.g., knee braces).
Related Standards
- ISO/TR 9790 - anthropomorphic side-impact dummy lateral response requirements (related biofidelity criteria).
- ISO 6487 - measurement techniques in impact tests (instrumentation, filtering).
Keywords: ISO TR 15766:2000, pedestrian protection, biofidelity, pedestrian-leg test devices, lateral knee-bending, knee-shear, knee-impact, knee-stiffness, impact-response targets, polystyrene foam.