From the micro-world of insects, car designers are finding big ideas. Insects may be small, but their bodies are masterpieces of evolutionary engineering — optimized for lightness, resilience, and flexibility in ways that conventional materials struggle to match. For decades, automotive engineers have borrowed ideas from nature, but in recent years the microscopic architecture of insect bodies — their exoskeletons, energy-storing proteins, and articulated joints — has emerged as a particularly powerful source of inspiration. By studying how insects manage mechanical stress, store energy, and distribute loads through complex cuticle structures, engineers are uncovering new ways to make vehicles that are lighter, stronger, and safer.

Insects achieve many of their feats using materials built from chitin, a biopolymer that’s combined with proteins to create an exoskeleton that’s both rigid and remarkably lightweight. Their internal structures often rely on resilin, an elastomeric protein that functions like a near-perfect biological spring — enabling efficient energy storage and release during jumping or wing motion.  Even more striking, insects are not passive recipients of stress: experiments have shown their exoskeletons grow stronger under elevated loads, demonstrating a capacity to adapt in response to greater force. [1]

When viewed through an engineering lens, these systems are not just fascinating biological curiosities — they are blueprints. The same structural motifs that allow an insect to withstand crushing pressures, absorb energy, or spring into flight can be translated into composite materials, vehicle joints, and adaptive surfaces. Civil engineers, for example, have already looked to beetle exoskeletons to improve concrete by introducing microstructures that dissipate energy rather than shatter under stress. On the front lines of this biomimicry movement, materials scientists and automotive designers are dissecting these natural mechanisms, adapting them to applications ranging from energy-absorbing crash structures to extremely lightweight fasteners.

In this way, the humble insect is emerging as an unlikely mentor for the automotive world: its body offers a roadmap for innovation, helping engineers rethink traditional trade-offs between strength, flexibility, and weight — and driving forward a new generation of vehicles engineered not just by humans, but with nature’s wisdom.

Insect Aerodynamics and Structural Efficiency

In the cutting-edge world of automotive design, engineers are increasingly turning to nature for inspiration — not just from sleek sea creatures and birds, but from insects. These tiny arthropods, with their highly optimized bodies, deliver lessons in aerodynamics, materials strength, and efficient structural design. One key area where insect biology is influencing car design is aerodynamics. Insect flight involves highly unsteady, flexible wings that constantly adjust, flex, and respond to changing airflow — a dance of structure and fluid mechanics that engineers are only beginning to unravel. Researchers studying insect wing mechanics have revealed that their structural mechanics and aeroelasticity — how the wings flex during flight — help maintain efficient control even under turbulent conditions.

Though cars don’t flap wings, engineers apply insect-inspired principles in managing airflow. By studying how insects minimize drag, they can develop car bodies with better flow control and reduced resistance. The result is vehicles that slice through the air more efficiently, improving fuel economy or increasing range in electric vehicles. Biomimicry in automotive design leverages these lessons: airflow control devices, adaptive surfaces, or even paneling that mimics the way insect wings deform and recover under stress.[3]

Beyond aerodynamics, insects also inspire lightweight structural design. Their exoskeletons — hard shells made of chitin and protein matrices — achieve a remarkable balance: lightweight yet incredibly strong. By examining these natural architectures and applying similar patterns, automotive engineers can create materials that maintain strength without adding unnecessary mass. This approach aligns with broader biomimicry trends in the automotive industry, where natural structures are being used to build lighter, more efficient, and safer vehicles.

Crash-Proofing Through Bug Armor: Learning from the Ironclad Beetle

Perhaps the most dramatic example of insect-inspired innovation in automotive engineering comes from research on the diabolical ironclad beetle (Phloeodes diabolicus). This beetle is something of a biological tank: it can withstand forces of up to 39,000 times its own body weight. Scientists discovered that its survivability under crushing force comes from its remarkably tough exoskeleton, particularly the way its wing covers (elytra) interlock over a seam called a suture.

Detailed imaging of the beetle using microtomography and electron microscopy revealed three structural motifs at this seam: interlocking "jigsaw" blades, latching connections, and flexible seams that can deform to absorb energy. Under compression, these structures do two things: first, the interlocking blades lock and resist separation; second, they delaminate — meaning little cracks form and spread in a controlled way — dissipating energy rather than allowing catastrophic fracture. [4]

What’s truly groundbreaking is that engineers have taken these biological blueprints to create biomimetic fasteners and materials. Research teams at universities like Purdue and UC Irvine reproduced the beetle’s interlocking seam in composite materials (carbon fiber), designing joints that are not only strong but also tough in a way that traditional fasteners rarely are. Their tests showed that these bio-inspired joints absorb energy gracefully, deforming under load but resisting sudden failure — a quality that could substantially improve the crash resistance and durability of automotive components.

In practical terms, the lessons from the beetle’s exoskeleton could influence the design of critical connections in cars — for instance, in structural joints, crash-absorption zones, or where different materials join (like metal to polymer). Using interlocking, energy-dissipating geometries could help vehicles better withstand impacts, reduce catastrophic failures, and make safer and longer-lasting structures.

Applications of Insect-Inspired Technology in Cars

Insect-inspired technology is not just theoretical; engineers are actively exploring practical ways to apply these lessons across multiple facets of car design. One immediate application is in crash zones and structural joints. Vehicles could incorporate interlocking, energy-dissipating patterns in door frames, bumpers, and chassis components, allowing them to better absorb impact forces while preventing catastrophic failure. These bio-inspired designs are particularly appealing for electric vehicles, where lightweight but strong materials are essential for maintaining performance and battery efficiency.

Aerodynamics inspired by insect wings also opens the door for adaptive surfaces on cars. Engineers are experimenting with panels that can slightly flex or change angle in response to wind speed, reducing drag and improving fuel efficiency. This could involve micro-actuated surfaces or even passive materials engineered to deform like insect wings under airflow, dynamically optimizing a car’s shape without complex mechanical systems.

Even interior components can benefit. The microstructures found in insect exoskeletons can inspire vibration-damping and noise-reducing materials, providing quieter and more comfortable rides. Lightweight composites mimicking chitin arrangements could replace traditional plastics or metals, resulting in stronger, lighter parts throughout the cabin.

Beyond passenger vehicles, heavy machinery and off-road vehicles can apply these designs for durable, crush-resistant panels. Bio-inspired joints could increase the lifespan of construction vehicles, agricultural equipment, or military vehicles, where components must survive harsh impacts and heavy loads without compromising performance.

Looking further ahead, the marriage of insect biomechanics and additive manufacturing (3D printing) allows engineers to directly fabricate complex, interlocking geometries that would be nearly impossible to produce with traditional manufacturing. Cars could be printed with internal lattice structures modeled on insect exoskeletons, providing localized reinforcement exactly where it is needed while keeping the overall weight low. This could transform automotive design, enabling entirely new approaches to safety, efficiency, and material use.

Sources:

[1]: https://phys.org/news/2023-12-exoskeletons-insects-stronger-higher-mechanical.html

[2]: https://connectsci.au/news/pages/cosmos-archive

[3]: https://pmc.ncbi.nlm.nih.gov/articles/PMC6218012

[4]: https://engineering.purdue.edu/CCE/Media/Impact/2021-Spring/ironclad-insights

References:

https://www.aranca.com/knowledge-library/articles/ip-research/biomimicry-automotive-industry-innovation

https://studyfinds.org/diabolical-ironclad-beetle-survive-run-over-by-car

https://scitechdaily.com/diabolical-ironclad-beetle-design-secrets-of-insect-that-can-survive-getting-run-over-by-a-car

https://als.lbl.gov/microstructures-explain-beetle-exoskeleton-strength