pavan tejaswi velivela

MICRO- TO MESOSCALE MULTIFUNCTIONAL STRUCTURES AND DEVICES (µm to cm)

PAINLESS MESO-SCALE SUTURE PIN FOR WOUND HEALINGDrawing inspiration from the kingfisher’s beak and porcupine quills, the conceptual suture pin design integrates the rotational parabolic cross-section of the kingfisher’s beak with the surface barbs found on porcupine quills. The rotational parabolic cross-section facilitates smoother tissue penetration and reduces insertion resistance, while the barbed surface structures provide anchoring within the tissue, improving stability against external disturbances.
The design hypothesis was evaluated by simulating the total deformation of both the tissue and the needle during puncture. The results indicate that the bio-inspired suture pin produces lower tissue deformation at higher puncture velocities and exhibits minimal structural deformation when an axial reaction force is applied at its tip. This increased structural stiffness reduces the force required for insertion, potentially improving surgical efficiency and reducing patient discomfort. In addition, the use of biodegradable materials supports post-operative convenience by eliminating the need for removal and reducing hospital revisits.

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HEAT ABSORPTION AND LOW-PRESSURE DROP MESOSCALE STRUCTURE This new conceptual design integrates effective heat transfer with low-pressure drop characteristics, offering potential applications in gas turbine engines for aerospace systems. Inspired by the labyrinthine structures of camel nostrils—known for minimising pressure loss and heat absorption—and the micro-bumps found on the surface of the Namib Desert beetle—used to enhance surface area and promote heat transfer—the design strategically combines these biological features.The visual representation showcases concentric tubes mimicking the intricate turbinates of camel nostrils, while semi-spherical projections on the tube surfaces replicate the beetle’s micro-bumps.The performance of the bio-inspired structure was evaluated against a range of lattice structures. Results indicate that the bio-inspired design exhibits superior performance in terms of pressure drop and remains comparable to primitive lattice structures in overall thermal–fluidic effectiveness.Industry collaboration:Siemens Energy Ltd, Canada

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MACRO-SCALE MULTIFUNCTIONAL STRUCTURES AND DEVICES

NON-PNEUMATIC TYRES: SPACE/EXTREME-WEATHER ROBOT*This concept in non-pneumatic tyre design demonstrates multifunctionality through effective friction management and impact resistance, with potential applications in extraterrestrial rovers and high-terrain vehicles. The design draws inspiration from the anisotropic microscopic texture of snakeskin for directional friction control and from the diverse porous cellular structures found in the pomelo peel and the woodpecker’s beak for enhanced energy absorption and structural resilience.Comparative Biological Feature Analysis:
To select the most effective structure from among cellular configurations offering similar functions (such as those of the pomelo peel and the woodpecker’s beak), a meta-level design parameter was introduced. This parameter was validated through a simulation-based study, demonstrating its utility in guiding multifunctional design selection.*Designed for comparative analysis between bio-inspired features that exhibit the same function

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WEARABLE DEVICES: MARINE SKINS*
This skin technology combines weight reduction and drag minimisation, making it ideal for marine applications, such as deep-sea exploration.
Comparative biological feature analysis: Different biological features independently evolve characteristics to solve the same need/necessity. This phenomenon is called convergent evolution. Without parameters, selecting a suitable feature from those that exhibit the same function and have the same geometric relevance becomes quite difficult.
This research identifies and investigates key parameters that support the selection of suitable biological features and enable the generation of multifunctional design concepts. These parameters are hypothesised by examining the mechanisms of tissue formation that lead to the emergence of structural features in biological systems. The resulting insights are integrated into the Expandable Domain Integrated Design (xDID) ideation model, which aids designers in selecting and combining biological features to develop multifunctional concepts.
*Designed for comparative analysis between bio-inspired features that exhibit the same function

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WEARABLE DEVICES: HELMETS FOR PROTECTION AGAINST HEAD INJURY*
By combining reduced drag, impact absorption, and sweat absorption, the bio-inspired helmets offer enhanced protection and usability against head injuries.
Comparative biological feature analysis:The phenomenon of convergent evolution, where distantly related organisms independently develop similar functions, adds to this complexity. This study introduces novel meta-level design parameters that systematically guide the selection of biological features with differing geometries yet analogous functions. These parameters were derived through physical testing and numerical analysis of woodpecker-beak-inspired and Balanus-inspired structures, focusing specifically on their impact resistance capabilities. The results highlight the potential for practical application in products such as bicycle helmet liners.
*Designed for comparative analysis between bio-inspired features that exhibit the same function

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Acknowledgement:Gratefully acknowledge Dr Chris Whitehall of Biokinetics and Associates Ltd., Ottawa, Canada, for his support in setting up the experimental apparatus and providing valuable guidance throughout the testing process.

CONCEPT ENGINEERING (NON-MBID)

MASKING MATERIALS & BIO-INSPIRED CAPS FOR CHEMICAL ETCHING OF DENTAL IMPLANTS
Osseointegration is a critical factor in the successful anchorage of implants to bone. This process is typically enhanced by micro-roughening the implant surface using techniques such as sandblasting followed by chemical etching, which facilitates a strong mechanical interlock with the surrounding bone to improve implant stability. However, surface protection is primarily necessary for the region intended to function as the artificial tooth root. Currently, there is limited literature addressing the behaviour of dental implants undergoing chemical treatment processes.
This study investigates the use of low-surface energy (LSE) polymer tapes and chemically inert materials, alongside bio-inspired cap designs, to protect the upper portion of dental implants during chemical etching. LSE tapes, known for their chemical resistance, are capable of withstanding the aggressive nature of acid treatments. Meanwhile, bio-inspired caps are designed to function as sealing agents, offering superior grip and flexibility to shield the implant surface effectively.
The study also explores a novel application of claw-inspired structures, traditionally associated with attachment or penetration, reimagined here as flexible and secure sealing elements for implant surface protection during etching.

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INTRODUCTION TO FLUX: A THERMOTHERAPY DEVICE FOR PATIENTS WITH RHEUMATISM
Device description:Flux is an automated thermotherapy device designed to support patients with rheumatism. Its functionality complies with established medical regulations and aligns with standards observed in comparable products on the market.
Device characteristics:The device delivers hot, cold, and contrast thermotherapy, as well as light pressotherapy, all in an automated and integrated manner. Its settings can be personalised according to a doctor’s prescription. Patients are able to adjust treatment duration and temperature within safe limits predefined by their healthcare provider.
Device operation:The base of the device houses two water containers, which users fill as needed. While the water requires periodic replacement, it does not need to be changed after every use. Hot water is generated via a built-in heating element, whereas cooling is achieved either automatically—through the thermoelectric effect—or manually, by adding ice to the designated container. A gear pump circulates water to a cuff worn by the patient, with directional valves controlling the flow of hot or cold water based on the selected therapy mode.
Industry collaboration:Dolphin Fluidics, Italy & Fluid-O-Tech, Italy

INTRODUCTION TO SIBILLA: A PORTABLE COFFEE INNOVATIONEmbracing the evolving trends in coffee consumption, Sibilla is an innovative portable coffee machine designed to meet the dynamic lifestyle needs of modern users. Inspired by De'Longhi's drip coffee mechanism, Sibilla specifically targets individuals aged 15–40, with a primary focus on working professionals seeking the convenience of high-quality coffee during work hours or while travelling.
Market Insight: Catering to User PreferencesInsights from a user survey revealed that a significant segment—particularly students and professionals—prefer consuming coffee at their workplace or educational institution. Respondents highlighted the importance of both the coffee experience and beverage quality. These insights directly informed the conceptual development of Sibilla, ensuring it addresses both functional needs and user expectations.
Industry collaboration:De'Longhi S.p.A., Italy

De' Longhi S.p.A project exhibition link: click here

EDUCATIONAL PLANT WATERING TOOL FOR PRE-SCHOOLERS: A CHILD-CENTRIC DESIGN
Designed to introduce preschool children to the world of plants, Daisy is an educational tool that teaches essential watering techniques through a playful and ergonomic approach. Inspired by conventional spray gun nozzles, Daisy has been reimagined to suit the small hands of young children—prioritising comfort, safety, and ease of use.
Key features:Daisy features a variety of spray nozzles, each designed for a distinct watering method. To support learning through play, the nozzles are colour-coded, helping children identify and distinguish between different spray patterns. Complementing this, a set of matching plastic labels allows parents to assign specific spray types to individual plant pots—transforming gardening into an interactive, hands-on experience that fosters curiosity, independence, and environmental awareness.

BIOMEDICAL ENGINEERING DESIGN PROJECT: INSTRUMENT-TISSUE INTERACTION IN SPINAL SURGERY
Conducted as part of the Biomedical Engineering Design course (WB2308) at TU Delft, this project focuses on developing an innovative medical device for separating muscle bundles during spinal surgery. Categorised under Instrument–Tissue Interaction 1, the design aims to minimise collateral damage to surrounding tissues during surgical procedures.
Design objective:The primary goal is to create a surgical instrument that enables precise separation of tissue layers, particularly in complex anatomical regions such as the spine. The device is intended to enhance the accessibility of conventional minimally invasive instruments by forming a straight tunnel between tissue layers. The straightness of this tunnel is critical, as it allows instruments to reach areas located behind the separated tissues while maintaining minimal invasiveness and preserving healthy tissue.
Scope:The project specifically addresses challenges in spinal surgery, with skeletal muscle identified as the target tissue for separation. By focusing on this application, the project contributes to the ongoing advancement of minimally invasive surgical techniques, aiming to improve surgical outcomes and patient recovery.