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TECHNICAL WHITEPAPER // DOC-001

STRUCTURAL

ANALYSIS

An engineering deep-dive into flexural rigidity, internal cargo mitigation, and the physics of the "frunk crease" across the Tesla lineup.

01 // THE PROBLEM

POINT LOAD
MECHANICS

The Tesla hood is engineered from lightweight stamped aluminum. While optimizing for range and weight, aluminum possesses a significantly lower Yield Strength compared to traditional steel.

The Failure Mode: When cargo inside the frunk (e.g., a suitcase corner or tool) presses upward against the closed hood, the force is applied to a microscopic surface area (< 5mm²).

This phenomenon creates a Point Load. Even moderate force, when concentrated on a single point, generates pressure ($P = F/A$) sufficient to permanently deform the aluminum crystalline structure. This results in the characteristic "outward crease" that is technically difficult and expensive to repair.

02 // THE SOLUTION

THE CUBE
LAW

FrunkVault utilizes the engineering principle of Flexural Rigidity. In plate mechanics, the stiffness of a panel is not linear—it is exponential relative to its thickness.

D ∝ Eh³ / 12(1-v²)

Simplified: Stiffness is proportional to the cube of thickness.

By installing the 4mm FrunkVault shield, we are not merely "adding a layer." We are creating a composite structure that exponentially increases the Second Moment of Area at the point of contact.

ANALOGY: THE SNOWSHOE EFFECT

Walking in deep snow with boots causes you to sink immediately. This is a Point Load (your suitcase corner).

Strap on a snowshoe (FrunkVault). Your weight hasn't changed, but your surface area has increased by 10x. You float. FrunkVault transforms the sharp "step" of your cargo into a gentle, distributed "float" across the hood's structure.

03 // SAFETY

CRUMPLE
ZONES

Automotive safety is our primary constraint. Tesla vehicles are designed with specific "crumple zones" in the hood to fold predictably during a frontal collision, absorbing energy and protecting passengers.

Compliance: FrunkVault is engineered specifically for internal low-velocity deflection.

The material selection (Glass-Fiber Reinforced PET) and 4mm geometry are calibrated to ensure they do not reinforce the hood against external high-velocity impacts. The composite is engineered for internal deflection only—in the event of a crash, FrunkVault will snap or fold harmlessly, allowing the aluminum hood to buckle exactly as Tesla engineers intended.

04 // THERMAL STABILITY

HEAT DEFLECTION
ENGINEERING

Unlike standard polymers that soften in high temperatures, FrunkVault's glass-fiber matrix maintains structural integrity up to 133°C (271°F). This prevents warping in extreme summer conditions where Tesla frunks can exceed 70°C.

Why Glass Over Carbon? While carbon fiber offers cosmetic appeal, glass fiber provides superior impact toughness and thermal stability—the exact properties required for internal cargo protection.