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Anonymous1771828241
02-23 08:13
Model Name
helmet 3d model
Tags
props
rendering
realistic
Prompt
Helmet Size: Medium Adult (Head Circumference 560–580 mm) External Dimensions Total Length (front to rear): 280 mm Maximum Width (side to side): 220 mm Maximum Height (bottom rim to top crown): 170 mm Wall curvature radius (crown): R120 mm Side curvature radius: R95 mm Layered Structure Thickness (Vertical Cross Section) From outside → inside: Layer Thickness Polycarbonate Shell 2 mm STF Capsule Layer 3 mm Auxetic EPP Core 20 mm Comfort Padding 5 mm Total Thickness 30 mm So: Internal head cavity height = 170 mm – 30 mm = 140 mm STF Capsule Grid Layout (Top View Dimensions) Capsule diameter: 15 mm Capsule thickness: 3 mm Capsule wall thickness: 0.5 mm Capsule spacing (center-to-center): 20 mm Total capsules: ~42 Grid Layout Area Effective coverage length: 240 mm Effective width: 180 mm Edge margin: 20 mm from helmet rim Auxetic Lattice Core Dimensions Re-entrant honeycomb structure: Cell width: 8 mm Cell height: 6 mm Wall thickness: 1.2 mm Core depth: 20 mm Pattern repeated across 240 mm × 180 mm internal surface Estimated number of cells: ~30 cells lengthwise ~22 cells widthwise Ventilation System Dimensions Front Intake Vents Quantity: 6 Each opening: 25 mm × 8 mm Spacing between vents: 15 mm Positioned 40 mm from front rim Rear Exhaust Vents Quantity: 4 Each opening: 30 mm × 10 mm Positioned 30 mm from rear edge Air Channels Channel width: 10 mm Channel height: 8 mm Runs through auxetic layer Electronics Compartment Dimensions Located rear-center inside helmet. PCB Compartment: Length: 45 mm Width: 45 mm Depth: 12 mm Battery: 1000 mAh Li-ion Size: 50 mm × 30 mm × 8 mm Sensor Modules: 6 Impact Sensors (MEMS accelerometers) Each: 10 mm × 10 mm × 3 mm Sensor Placement Coordinates (relative to helmet center) Sensor X (mm) Y (mm) Z (mm) F1 +90 0 +60 F2 +60 +70 +60 F3 +60 -70 +60 R1 -80 +60 +50 R2 -80 -60 +50 R3 -100 0 +40 Origin (0,0,0) = helmet geometric center. Chin Strap Anchors Anchor diameter: 6 mm Reinforced plate: 20 mm × 20 mm × 3 mm Located 35 mm above bottom rim Positioned 75 mm from front Weight Estimation (Approx.) Shell: 180 g Auxetic core: 220 g STF layer: 150 g Electronics: 120 g Padding + straps: 80 g Total Estimated Weight: ~750 g (Standard helmets ≈ 300–400 g — this is heavier but acceptable for prototype stage.) Complete 3D Bounding Box For CAD modeling: Create base ellipsoid: Length = 280 mm Width = 220 mm Height = 170 mm Offset inward 30 mm for inner cavity. Apply 6° rear aerodynamic taper. Apply 15° front forehead slope.
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