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design of a Flexible bionic Ankle Prosthesis Based on Subject-specific Modeling of the Human Musculoskeletal System

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Journal of bionic Engineering 2023年第3期20卷 1008-1020页

作者： Jianqiao Jin Kunyang Wang Lei Ren Zhihui Qian Wei Liang Xiaohan Xu Shun Zhao Xuewei Lu Di Zhao Xu Wang Luquan Ren Key Laboratory of bionic Engineering Ministry of EducationJilin UniversityChangchun130025China Weihai Institute for bionics Jilin UniversityWeihai264402China School of Mechanical Aerospace and Civil EngineeringUniversity of ManchesterManchesterM139PLUK

A variety of prosthetic ankles have been successfully developed to reproduce the locomotor ability for lower limb amputees in daily lives. However, they have not been shown to sufficiently improve the natural gait mechanics commonly observed in comparison to the able-bodied, perhaps due to over-simplified designs of functional musculoskeletal structures in prostheses. In this study, a flexible bionic ankle prosthesis with joints covered by soft material inclusions is developed on the basis of the human musculoskeletal system. First, the healthy side ankle–foot bones of a below-knee amputee were reconstructed by CT imaging. Three types of polyurethane rubber material configurations were then designed to mimic the soft tissues around the human ankle, providing stability and flexibility. Finite element simulations were conducted to determine the proper design of the rubber materials, evaluate the ankle stiffness under different external conditions, and calculate the rotation axes of the ankle during walking. The results showed that the bionic ankle had variable stiffness properties and could adapt to various road surfaces. It also had rotation axes similar to that of the human ankle, thus restoring the function of the talocrural and subtalar joints. The inclination and deviation angles of the talocrural axis, 86.2° and 75.1°, respectively, as well as the angles of the subtalar axis, 40.1° and 29.9°, were consistent with the literature. Finally, dynamic characteristics were investigated by gait measurements on the same subject, and the flexible bionic ankle prosthesis demonstrated natural gait mechanics during walking in terms of ankle angles and moments.

关键词： Ankle prosthesis bionic design Soft materials Variable stiffness Gait mechanics

bionic design and performance test of maize grain cleaning screen through earthworm motion characteristics

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International Journal of Agricultural and Biological Engineering 2021年第3期14卷 12-21页

作者： Lijun Wang Yongtao Yu Shuai Zhang Xin Feng Lianglai Song College of Engineering Northeast Agricultural UniversityHarbin 150030China

The maize mixture feeding with a large mass cannot be migrated backward rapidly along the planar reciprocating vibrating screen,and it is easy to accumulate in the front of the screen,which leads to the decrease of screening efficiency.Based on the reverse engineering technology,using the wavy geometry formed during the earthworm(Pheretima guillelmi)moving as a bionic prototype,a bionic screen was designed to make the maize mixture migrate backward rapidly in the front of the screen.The contour curve of earthworm’s head in an axial contracted state was extracted and fitted to obtain its equation.Based on the difference of concave position of the lower surface’s wavy geometry during the earthworm moving,the motion of the bionic screen was divided into four postures,and the conversion between different postures of the bionic screen was realized by the cam drive mechanism.The kinematics simulation of the bionic screen was carried out through ADAMS,and the displacement and velocity of the bionic screen were analyzed.When the feeding mass of the maize mixture was set at 5 kg/s,6 kg/s and 7 kg/s,the test results showed that the time of the maize mixture migrated(TOMMM)in the front of the bionic screen was shortened by 0.18 s,0.71 s,and 1.36 s,respectively,compared with that of planar reciprocating vibrating screen.The total screening time(TST)of the bionic screen was shortened by 1.28 s,1.33 s,and 1.53 s,respectively.The ability of the maize mixture to be migrated backward was improved.This study can provide a reference for the innovative design of the cleaning screen.

关键词： cleaning screen maize grain harvester material accumulation earthworm bionic design motion characteristics

Study of the Ballistic Impact Behavior of Protective Multi-Layer Composite Armor

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Computer Modeling in Engineering & Sciences 2024年第7期140卷 171-199页

作者： Dongsheng Jia Yingjie Xu Liangdi Wang Jihong Zhu Weihong Zhang State IJR Center of Aerospace design and Additive Manufacturing Northwestern Polytechnical UniversityXi’an710072China

The abalone shell,a composite material whose cross-section is composed of inorganic and organic layers,has high strength and toughness.Inspired by the abalone shell,several multi-layer composite plates with different layer sequences and thicknesses are studied as bullet-proof material in this paper.To investigate the ballistic performance of this multi-layer structure,the complete characterization model and related material parameters of large deformation,failure and fracture ofAl_(2)O_(3)ceramics andCarbon Fiber Reinforced Polymer(CFRP)are studied.Then,3D finite element models of the proposed composite plates with different layer sequences and thicknesses impacted by a 12.7 mm armor-piercing incendiary(API)are built using Abaqus to predict failure.The simulation results show that the CFRP/Al2O3 ceramic/Ultrahigh Molecular Weight Polyethylene(UHMWPE)/CFRP(1 mm/4 mm/4 mm/1 mm)composite is the optimized stack of layers.The simulation results under specified layer sequence and thickness have a reasonable correlation with the experimental results and reflect the failure and fracture of the multi-layer composite protective armor.

关键词： Protective armor composite bionic design structure design mechanical property

design of A bionic Spudcan and Analysis of Penetration and Extraction Performances for Jack-up Platform

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China Ocean Engineering 2020年第1期34卷 80-88页

作者： GUO Sheng ZHUANG Hong TANG Wen-xian WU Wen-le LIU Qin WANG Yue-yang School of Mechanical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Jiangsu Provincial Key Laboratory of Advanced Manufacturing for Marine Mechanical Equipment Jiangsu University of Science and TechnologyZhenjiang 212003China

The mechanisms of soil structure interaction have drawn much attention in the past years in the installation and operation of jack-up platform. A bionic spudcan produced by biomimetic of egg and snail shell is proposed, and the performance of the penetration and extraction are analyzed by numerical method. The geometric contour of egg and snail shell is measured, and its mathematical model is established respectively. According to the structure of existing spudcan of jack-up platform, three kinds of typical biomimetic spudcan are designed. Furthermore, numerical analysis models of biomimetic spudcan are established respectively to study the soil structure interaction mechanism in the process of penetration and extraction, and contrastive analysis of resistance characteristics are carried out. To conclude, the results show that the biomimetic spudcan facilitates the platform installation, and it is also beneficial to the improvement of the bearing capacity of spudcan.

关键词： jack-up platform egg shell snail shell bionic design spudcan soil structure interaction

design and 3D Printing of Graded bionic Metamaterial Inspired by Pomelo Peel for High Energy Absorption

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Chinese Journal of Mechanical Engineering(Additive Manufacturing Frontiers) 2023年第1期2卷 47-54页

作者： Zhi Zhang Bo Song Junxiang Fan Xiaobo Wang Shuaishuai Wei Ruxuan Fang Xinru Zhang Yusheng Shi State Key Laboratory of Materials Processing and Die&Mould Technology School of Material Science and TechnologyHuazhong University of Science and TechnologyWuhan430074China

Light-weight,high-strength metamaterials with excellent specific energy absorption(SEA)capabilities are sig-nificant for aerospace and automobile.The SEA of metamaterials largely depends on the material and structural design.Herein,inspired by the superior impact resistance of pomelo peel for protecting the pulp and the elevated SEA ability of a functionally graded structure,a graded bionic polyhedron metamaterial(GBPM)was designed and realized by 3D printing using a soft material(photosensitive resin)and a hard material(Ti-6Al-4V).Guided by compression tests and numerical simulations,the elevated SEA ability was independent of the materials.The fluctuation region appeared in hard-material-fabricated bionic polyhedron metamaterial(BPMs)and was absent in soft-material-fabricated BPMs in the stress-strain curves,resulting in the growth rate of the SEA value of the soft-material-fabricated GBPM being enhanced by 5.9 times compared with that of the hard-material-fabricated GBPM.The SEA values of soft-and hard-material-fabricated GBPM were 1.89 and 44.16 J/g,which exceed those of most soft-and hard-material-fabricated metamaterials reported in previous studies.These findings can guide the design of metamaterials with high energy absorption to resist external impacts.

关键词： bionic design Functionally graded design Specific energy absorption 3D printing

Structural design and stiffness matching control of bionic variable stiffness joint for human–robot collaboration

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Biomimetic Intelligence & Robotics 2023年第1期3卷 46-56页

作者： Xiuli Zhang Liqun Huang Hao Niu School of Mechanical Electronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China Beijing Xiaomi Mobile Software Co.LTD Beijing 100085China

The physical compliance of interaction is an important requirement for safe and efficient collaboration between robots and humans,and the realization of human–robot compliance requires robot joints with variable stiffness similar to those of human joints.In this study,based on the tissue structure and driving principle of the human arm muscle ligament,a robot joint with variable stiffness is designed,consisting of an elastic belt and serial elastic actuator in parallel.The variable stiffness of the joint is realized by adjusting the tension length of the elastic belt.Surface electromyography(sEMG)signals of the human arm are used as the characterization quantity of joint stiffness to establish the pseudostiffness model of the elbow joint.The stiffness of the robot joints is adjusted in real-time to match the human arm stiffness based on the changes in sEMG signals of the human arm during operation.Real-time compliant interaction of human–robot collaboration is realized based on an end stiffness matching strategy.Additionally,to verify the effectiveness of the human joint stiffness matching-based compliance control strategy,a human–robot cooperative lifting experiment was designed.The bionic variable stiffness joint shows good stiffness adjustment,and the human–robot joint stiffness matching strategy based on human sEMG signals can improve the effectiveness and comfort of human–robot collaboration.

关键词： Variable stiffness joint bionic design Human-robot collaboration Stiffness matching sEMG

基于仿生设计法的上海闵行区古美街道公交站台设计

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设计 2024年第2期9卷 434-446页

作者：何禹隆吴文治上海工程技术大学艺术设计学院，上海

随着社会大众的艺术审美水平和生活品质的提升，人类对社会环境、城市公共设施的需求也在逐渐发生着变化，趣味性的城市家具也越来越成为了人类日常生活中的基本需要。本文以现代都市中的公共交通站台为主要研究对象，从仿生设计的观点... 详细信息

随着社会大众的艺术审美水平和生活品质的提升，人类对社会环境、城市公共设施的需求也在逐渐发生着变化，趣味性的城市家具也越来越成为了人类日常生活中的基本需要。本文以现代都市中的公共交通站台为主要研究对象，从仿生设计的观点入手，深入探讨了现代家具外形设计中仿生手段的使用。并分别从仿生设计方式中的形体仿生、颜色仿生、功能仿生三方面对上海闵行区古美街道的公共交车站的设计做出了详尽介绍，分析其运用的仿生设计手法及造型的选择。研究如何将上海市花白玉兰通过仿生设计与闵行区古美公园文化的充分结合，创造出具有时代地域特色的公交车站。丰富日常生活中城市家具的形态以及趣味性的表现，拓展城市家具的创新设计思路。

关键词：仿生设计上海城市家具设计公交车站古美公园 bionic design Shanghai Urban Furniture design Bus Stop Gumei Park

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动物仿生元素在创意女装中的运用

Compression Behavior and Failure Mechanisms of bionic Porous NiTi Structures Built via Selective Laser Melting

设计 2024年第2期9卷 462-471页

作者：李筱彦李正苏州大学艺术学院，江苏苏州

仿生设计给人类带来了许多的好处，给各行各业的设计师都提供了灵感来源。但是生态环境的日益恶化，导致动物的灭绝，这值得我们深思。仿生设计能拉近人与自然与动物之间的联系，唤醒人们对于保护动物的意识。本文从动物仿生元素出发，... 详细信息

仿生设计给人类带来了许多的好处，给各行各业的设计师都提供了灵感来源。但是生态环境的日益恶化，导致动物的灭绝，这值得我们深思。仿生设计能拉近人与自然与动物之间的联系，唤醒人们对于保护动物的意识。本文从动物仿生元素出发，研究创意女装的造型设计。本次设计的创新之处在于从创意服装的角度来表现动物仿生元素的运用，将动物仿生元素的理念与创意女装设计相融合，希望能够促进动物仿生元素在服装设计行业中的运用，推动其向更好的方向发展。

关键词：创意女装仿生设计动物元素 Creative Women’s Wear bionic design Animal Element

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Acta Metallurgica Sinica(English Letters) 2023年第6期36卷 926-936页

作者： Xiaolong Zhang Yue Jiang Shupeng Wang Shuo Wang Ziqiang Wang Zhenglei Yu Zhihui Zhang Luquan Ren Key Laboratory of bionic Engineering Ministry of EducationJilin UniversityChangchun 130022China Luoyang Ship Material Research Institute Luoyang 471023China

Inspired by the crystal microstructure of metals and the bamboo,the bionic porous NiTi structures with the porosities in the range of 75.8%–84.9%were built via selective laser melting(SLM).The compression behavior and the failure mechanisms of the porous NiTi structures were evaluated.It demonstrated an increase in the elastic modulus and ultimate strength when the porosity was decreased,from 3.06 to 7.66 GPa and from 34.1 to 147.6 MPa,respectively.The relationship between the elastic modulus and the porosity obtained by the finite element analysis exhibited similar tendency with the experiment,and agreed well with the Gibson-Ashby model’s prediction.Based on the theoretical model above and the observation of the deformation processing,the plastic deformation behavior and failure mechanisms of the SLMed porous NiTi structures were analyzed.

关键词： Selective laser melting NiTi shape memory alloys Additive manufacturing Porous structure bionic design