轻量化鞋底结构设计及3D打印

LIGHTWEIGHT SOLE STRUCTURE DESIGN AND 3D PRINTING

王壮

11849014

硕士

机械工程

白家鸣

2020-06-02

2020-07-20

哈尔滨工业大学

深圳

轻量化运动鞋因具有轻便、舒适、透气、优良的缓震性能等诸多优点受到消费者青睐，具有巨大的市场前景，而当前出现的轻量化运动鞋由于针对性不足、产品过少、价格昂贵等问题，难以大规模的进入市场。本文从运动鞋的轻量化出发，考虑到鞋底不同区域的差异和个性化定制，重新设计了运动鞋中底结构，再结合3D打印技术，成功制备了成本低，性能优良的轻量化运动鞋中底，并用模拟仿真和实验验证了结构的合理性和可行性。 本文首先对3D打印轻量化运动鞋的市场前景进行分析，详细比对了3D打印轻量化运动鞋与传统运动鞋的优劣势，综合分析了3D打印技术的发展和运动鞋未来市场规模对3D打印轻量化运动鞋未来发展的促进作用。之后通过对轻量化结构现状研究、3D打印多孔结构性能研究和当前3D打印运动鞋的现状分析，得出3D打印轻量化运动鞋的鞋底不同区域需进行针对性设计和个性化定制。依据不同区域在不同步态下的差异，制定了不同区域的设计要求和指标。探究了3D打印运动鞋的工艺，包括打印方式、材料及打印参数。为了实现轻量化，对鞋中底进行整体设计，包括区域划分、链接方式、区域内部结构设计方式等。通过建立BCC结构单元力学模型，运用模拟仿真得出了结构参数的变化对压缩变形量的影响，包括其他条件不变，底面边长L1、L2的增大能够增大压缩变形量、高度H的增大会降低压缩变形量，以及不同角度 下的最优长径比，并依据模拟数据制定了设计范围。通过实验探究了BCC和四面体结构单元的抗冲击性能、弹性回复性能、抗撕裂性能等。首先，依据抗冲击能力，将结构划分到不同区域，并排除不符合设计要求的结构单元。其次，将符合抗冲击能力的结构单元进行1000次反复压缩，压缩后的压缩形变均在5%以内，放置0.5h后的压缩形变在1%以内，均符合设计要求。然后，将符合跖骨区域的BCC结构和四面体结构进行抗撕裂实验，发现尺寸为5×5×5mm，直径1.5mm的BCC结构抗撕裂性能最好。最后，在符合不同区域设计要求的结构中，结合孔隙率以及打印的成功性，确定了鞋底的整体结构，实现了鞋底的轻量化的目标。针对个人差异和自身需求，设计了具有个人特色且孔隙率在50%以上的轻量化鞋底，并将该鞋底打印出来，最终实现了个性化定制与轻量化的结合。

Lightweight sneakers are favored by consumers because of their many advantages such as light, comfortable, breathable and excellent shock-absorbing performance, which have a huge market prospect. However, the lightweight sneakers currently appear are difficult to enter the market on a large scale due to their weak pertinence, few products and high price. In this paper, starting from the light weight of sneakers, considering the differentiation and personalized customization of different areas of the sole, the mid-sole structure of sneakers was redesigned. In combination with 3D printing technology, lightweight midsole with low cost and excellent performance were successfully prepared, and the rationality and feasibility of the structure were verified by simulation and experiments. This paper firstly analyzes the market prospect of 3D printed lightweight sneakers, compares the advantages and disadvantages of 3D printed lightweight sneakers and traditional sneakers in detail, and comprehensively analyzes the development of 3D printing technology and the promotion effect of the future market size of sneakers on the future development of 3D printed lightweight sneakers. After that, through the research on the status quo of lightweight structure, the research on the performance of 3D printed porous structure and the analysis of the current status of 3D printed sneakers, it is concluded that different areas of the sole of 3D printed lightweight sneakers need to be designed and customized. According to the difference of different regions in different gait, the design requirements and indexes of different regions were developed. This paper explores the technology of 3D printing sports shoes, including printing methods, materials and printing parameters.In order to achieve light weight, the overall design of the middle sole of the shoe, including regional division, linking mode, regional internal structure design mode, etc. Through the establishment of BCC structure unit model, using the simulation the change of the structure parameters are drawn to the influence of compression deformation, including other conditions unchanged, the bottom side of L1 and L2 can increase compression deformation, the increase of height H will reduce the compression deformation, and different angles of the 'diameter ratio, and based on the simulated data made the design scope.The impact resistance, elastic recovery and tear resistance of BCC and tetrahedral structural units were investigated through experiments. First, according to the impact resistance, the structure is divided into different areas and the structural units that do not meet the design requirements are excluded. Secondly, the structural units of BCC and tetrahedral conforming to the shock resistance were compressed for 1000 times repeatedly. The compression deformation after compression was all within 5%, and the compression deformation after 0.5h was all within 1%, which all met the design requirements. Then, the BCC structure and tetrahedral structure conforming to the metatarsal region were tested for tear resistance, and it was found that the BCC structure with the size of 5×5×5mm and the diameter of 1.5mm had the best tear resistance performance. Finally, in accordance with the design requirements of different areas of the structure, combined with porosity and the success of printing, determine the overall structure of the sole, to achieve the goal of lightweight sole.According to individual differences and their own needs, a lightweight sole with personal characteristics and a porosity of more than 50% was designed and printed out, finally realizing the combination of personalized customization and lightweight.

轻量化 结构设计 3D 打印 个性化

lightweight structure design 3D printing personalization

中文

联合培养

南方科技大学

王壮. 轻量化鞋底结构设计及3D打印[D]. 深圳. 哈尔滨工业大学,2020.