CAREER: Fundamental Research on Rotary Ultrasonic Machining of Dental Ceramic Materials

职业：牙科陶瓷材料旋转超声加工的基础研究

• 批准号: 0953502
• 负责人: Zhichao Li
• 金额: $ 40万
• 依托单位: North Carolina Agricultural & Technical State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-02-01 至 2016-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0953502&HistoricalAwards=false
• 关键词: CAREER; Fundamental; Research; Rotary; Ultrasonic

The research objective of this Faculty Early Career Development (CAREER) award is to test the hypothesis that machined surface and subsurface quality of dental ceramic materials can be significantly enhanced by rotary ultrasonic machining. Approaches of finite element analysis and design of experiments combined with theory of contact mechanics and fracture mechanics will be employed to carry out the following research tasks: investigate mechanisms of material removal and subsurface damages generation; solve the problem of complex surface machining; quantify machining induced damages; measure ultrasonic vibration amplitude within accuracy ±0.1 micron; and discover the relationship between ultrasonic vibration amplitude and subsurface damages. The educational objective of this CAREER proposal is to enhance the education program in manufacturing at a Historically Black College/University. The specific approaches involve incorporating research results into existing manufacturing courses; developing a research laboratory; recruiting African American graduate students; developing multimedia courses to improve manufacturing education; and involving undergraduate students and K-12 teachers. If successful, the research is expected to bring about a breakthrough innovation in dental ceramic manufacturing, which will directly benefit the nation?s medical consumers and society. An innovative and crack-free precision machining technology will be provided for the US dental industry. The research results will also benefit other medical industries where bioceramic materials are widely used such as bone and joint replacements. The proposed education activities in this CAREER plan will improve engineering education at North Carolina Agricultural and Technical State University, contribute to increase the percentage of engineering doctorates awarded to African Americans, and broaden participation of underrepresented populations and non-traditional students in engineering research.

这项教师早期职业发展(CALEAR)奖的研究目标是验证旋转超声加工可以显著提高牙科陶瓷材料的加工表面和亚表面质量的假设。本文将采用有限元分析和实验设计相结合的方法，结合接触力学和断裂力学理论，开展以下研究工作：研究材料去除和亚表面损伤产生的机理；解决复杂表面加工问题；量化加工诱发损伤；测量精度为±0.1微米的超声振动幅度；揭示超声振动幅度与亚表面损伤之间的关系。这份职业建议书的教育目标是加强历史悠久的黑人学院/大学的制造业教育计划。具体方法包括将研究成果纳入现有的制造业课程；建立研究实验室；招收非裔美国研究生；开发多媒体课程以改善制造业教育；并让本科生和K-12教师参与。如果研究成功，有望带来牙科陶瓷制造的突破性创新，直接造福国家--S医疗消费者和社会。将为美国牙科行业提供一种创新的、无裂纹的精密加工技术。研究成果还将惠及其他广泛使用生物陶瓷材料的医疗行业，如骨和关节置换。这项职业计划中拟议的教育活动将改善北卡罗来纳农业和技术州立大学的工程教育，有助于增加授予非裔美国人的工程学博士学位的比例，并扩大代表不足的人口和非传统学生对工程学研究的参与。