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李冰冰: 增材制造中的轻量化设计及在金属与生物3D打印中应用
发布日期:2019-07-11  字号:   【打印

报告时间:2019年7月12日(星期五)15:30

报告地点:机械楼二楼214报告厅

  :李冰冰 助理教授

工作单位:美国加州州立大学制造系统工程系

举办单位:机械工程学院

报告人简介

李冰冰,美国加州州立大学制造系统工程系助理教授。2005年、2008年于合肥工业大学机械工程学院获得学士及硕士学位,2012年获得美国德克萨斯理工大学工业工程博士学位,2012-13年在美国威斯康辛大学密尔沃基分校从事博士后研究工作。研究方向是可持续制造,增材制造和智能制造。发表30多篇英文论文,连续四年荣获加州州立大学北岭分校授予的“2016、2017、2018、2019年科研项目负责人突出贡献奖”及2018年加州圣费尔南德谷工程师理事会授予的“工程杰出成果优异奖”等荣誉;作为项目负责人PI科研资助主要来源于美国国防部空军科学研究局、美国国家科学基金委、美国能源部清洁能源智能制造创新研究院。

报告简介

From the very start, we as mechanical engineers are taught to design parts as simply as possible – square and chunky – so the parts can be economically manufactured. This was due to the limit of available manufacturing technology. Today, however, everything has changed with Additive manufacturing (AM). AM is a class of manufacturing processes where material is deposited in a layer-by-layer fashion to fabricate a three-dimensional part directly from a computer-aided design model. It was first demonstrated more than twenty five years ago, but it has transformed significantly from its early days, when the primary market was rapid prototyping. AM processes now can use metals, polymers, ceramics, and composites to manufacture a large range of durable and fully functional products in moderate to large quantities. The presentation will share Dr. Li’s experience of additive manufacturing in undergraduate research, senior design innovation, industrial and applied research, and engineering education project.

Pore size, external shape, and internal complexity of additively manufactured porous titanium scaffolds for bone tissue engineering are three primary determinants of the cell viability and structural strength of the scaffolds. In the aim at finding an optimal design with a combination of the best of all three determinants we designed four scaffolds each with a unique topology (external geometry and internal structure) and varied the pore sizes of each three times. For each topology, we designed scaffolds with pore sizes of 300, 400, and 500 µm adding up to twelve scaffolds in total. All twelve scaffolds were then 3D printed in titanium Ti6Al4V by Concept Laser M2 metal 3D printer. The scaffolds were compression tested to understand the relationship between a scaffold’s pore size and its structural strength. The results of the test revealed that scaffolds with a pore size of 300 µm were structurally strongest and the ones with a pore size of 500 µm were the weakest.

(陈华/文)  
编辑:徐小红
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