Meta Mecha 義肢襯墊 by Xuerong Cai is a highly esteemed winner of the very prestigious 2023 A' Design Award 鐵獎 in 仿生學設計 Competition Category.

鐵仿生學· 2023

Meta Mecha 義肢襯墊

by Xuerong Cai

Client: Meta Mecha

A' Design Award 鐵獎 Winner in 仿生學 Category

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View at A' Design Award Press Release Award Badge

Colors

The Design

About Meta Mecha 義肢襯墊

Meta Mecha係一款用機械超材料製成嘅義肢承筒襯墊。呢個襯墊係根據殘肢嘅3D掃描數據,以及行走過程中收集嘅壓力數據所生成,令機械表面能夠符合個人化嘅醫療需求。Meta Mecha採用彈性TPU材料,喺工業級打印機上以3D打印方式製造。當中設有一種壓力感應材料,一旦壓力超過承受極限就會變色,提示使用者襯墊需要更換。更換過程簡單又經濟實惠,同時亦能配合殘肢逐漸變形嘅情況。

The Recognition

About the A' Design Award 鐵獎

Meta Mecha 義肢襯墊是 A' Design Award 鐵獎得主，這是授予滿足人們對設計精良的創作所期待的專業與工業要求的優良設計的聲望認可。鐵獎得主展現出其創作者的高超技藝、高度專業化、專家級的理解力和創造能力。預計Meta Mecha 義肢襯墊將成為一件備受推崇、令人欽佩且被珍愛的創作，既實用又創新。這件贏得 A' Design Award 鐵獎的設計整合了行業最佳實踐，並擁有與專業知識和才華相結合的稱職技術特性。Meta Mecha 義肢襯墊因其嚴謹而受到尊重，旨在提供有助於讓世界變得更美好的生活品質改善。

Behind the Design

Press Kit

Credits, team members and technical details provided by the designer.

Unique Properties: With 3D printable mechanical metamaterials as the prosthetic liner, Meta Mecha makes it possible to customize mechanical surfaces for different amputees according to personalized medical requirements.
The pressure sensitive color-changing material provides visualization of the unsuitability and draws attention.
The prosthetic liner can be replaced to support the deformation process of residual limb. The user can update their mechanical surface inside the prosthetic in a simple and economical way.
Dimensions & Packaging: Width 136mm*Depth 139mm*Height 175mm
(The dimensions of prosthetic liner should differ from user to user, above is an example of our case)
Tags: Prosthetic socket liner, Customized design, 3D print, Computational design
Production Technology: The mechanical metamaterial prosthetic liner is 3D printed with industrial quality 3D printers and elastic TPU. It is impossible to manufacture the complex 3D shape without additive manufacturing technology.
3D scanning and pressure sensor equipment are used before the design process to acquire the shape and mechanical requirements of amputees.
Generative design approach is used to generate design with customized requirements. In our prototype, we use Grasshopper to generate our design.
Design Challenge: It is a challenge for us to understand the logic and process of editing mechanical metamaterial. We have referred to many papers and interviewed a metamaterial specialist in our university and finally managed to arrange the structure unit on a prosthetic liner by using Grasshopper and plugins. Another challenge emerges when we try to prototype the product with 3D printing. It took us a while to find an industrial 3D printing laboratory that can use TPU to print the complex structure of metamaterial.
Research: We had looked through papers on mechanical metamaterials, medical requirements on prosthetic and computational design to understand how to apply metamaterials in the prosthesis field. We then had conversations with a metamaterial specialist to verify our idea. We also printed out ten little blocks with metamaterial structure to experiment on different mechanical properties.
Inspiration: The future trend of computational design draws our attention to programmable matter and metamaterial. We are surprised to find its potential to empower design with material science and motivated to reconsider objects in microscopic logic.
With generative design and simulation tools, we propose application of metamaterial in the prosthetic field, offering both customized and medically compliant service.
Project Duration: The project started in October 2021 in Shanghai, the first prototype was exhibited in D&I Shanghai in December 2021. An educational exhibition based on the project was shown in Shanghai Dyson Ideation Lab from February.
Operation Flow: Users first get residual limb 3D scanning and walk in a common socket to collect his pressure distribution data. A 3D model of metamaterial prosthetic liner is generated based on the data collected and medical requirements. After the prosthetic liner is 3D printed, it will be assembled with other parts of the prosthesis and delivered to the user. The prosthetic liner adjusts the best pressure level for the user and warns the user when pressure exceeds tolerance limits by color change. With the visual cue, the user can understand it's time to replace the liner to fit his residual limb deformation.
Team Members: Longyu Gong
Ruikun Pan
Xuerong Cai
Yanyun Wu
Image Credits: Images: Xuerong Cai, Ruikun Pan, Yanyun Wu, Longyu Gong