CAREER: Modeling The Failure of Advanced Materials

由复合材料和层合板制成的9702399结构通常由于在一系列长度尺度上工作的相互作用的损伤模式的组合而失效。抗失效设计是复杂的，因为与整体式金属合金不同，没有单一的失效模式占主导地位。因此，开发具有预测能力的模型，包括这种损伤的影响，对于使用聚合物、金属和陶瓷基先进材料的结构的有效设计至关重要。斯皮林博士的核心研究活动是开发先进材料失效的物理模型。这些模型将以一种适合作为结构设计工具、在航空航天应用和其他地方使用的形式提出并积极传播。斯皮林博士通过参与以前的工业和学术界项目，在聚合物和陶瓷基复合材料以及层状陶瓷材料方面奠定了坚实的基础。研究将包括使用封闭形式和数值、固体力学和断裂力学解决方案进行建模，并辅之以适当的机械测试和观察技术。重点将是与工业界、学术界和政府机构的合作伙伴一起就重要的技术主题进行研究。斯皮林博士的教育目标是在课堂教学、学生监督和指导活动中脱颖而出。他将继续开发一门新的研究生课程，为学生奠定复合材料破坏力学的坚实基础，特别是专注于使用材料力学模型预测结构性能。本课程通过斯皮林博士于1995年讲授的现有课程“纤维复合材料的力学”，直接与院系现有的课程相联系。此外，新课程是对上面概述的研究计划的补充。这一课程与研究相结合的长期目标是改进这门重要学科的教学，使其可以作为教科书或计算机教学工具。斯皮林博士共同教授一门关于复合材料制造和机械测试的本科生实验室课程，这为该系的研究活动和本科生课程之间提供了强有力的联系。斯皮林博士将继续担任本科生和研究生的顾问，在学术、职业和其他问题上，他还将继续通过监督研究活动来教育研究生和本科生。根据职业教师早期职业发展计划授予的这笔赠款将支持本提案中所述的教育和研究活动。特别是，它将允许调查员和一名研究生将时间用于整合这些活动。此外，它还将加强与大学、政府机构和行业同事的合作。总的目标是实现更普遍的先进材料失效模型的综合，并以一种通知和教育当代和未来几代工程师的方式进行交流。

Spearing 9702399 Structures made from composite materials and laminates generally fail by a combination of interacting damage modes operating over a continuum of length scales. Design against failure is complicated because, unlike monolithic metal alloys, no single failure mode dominates. It is, therefore, critical to develop models with a predictive capability that include the effects of such damage for the efficient design of structures, using polymer, metal and ceramic-based advanced materials. Dr. Spearing's core research activity is the development of physically-based models for the failure of advanced materials. These models will be presented and actively communicated in a form suitable for use as structural design tools, in aerospace applications and elsewhere. Dr. Spearing has a strong grounding in this activity through his involvement in previous projects, in industry and academia, on polymer and ceramic matrix composites and layered ceramic materials. Research will include modeling, using closed-form and numerical, solid mechanics and fracture mechanics solutions supported by appropriate mechanical testing and observational techniques. The emphasis will be on conducting research on technologically important topics in conjunction with partners in industry, academia and government agencies. Dr. Spearing's educational goal is to excel at classroom teaching, student supervision and mentoring activities. He will continue to develop a new graduate course to give students a solid grounding in the failure mechanics of composite materials, particularly focusing on the use of mechanics of materials models to predict structural performance. This course links directly to the established departmental curriculum, through an existing course on the "Mechanics of Filamentary Composites," taught by Dr. Spearing in 1995. In additi on the new course complements the research plan outlined above. A longer term goal of this curriculum and research integration is to refine the teaching of this important subject to the point where it can be written as textbook or as a computer-based teaching tool. Dr. Spearing co-teaches an undergraduate laboratory course on the manufacture and mechanical testing of composite materials, which provides a strong link between the department's research activities and the undergraduate curriculum. Dr. Spearing will continue to act as an advisor for undergraduate and graduate students, on academic, career and other concerns, He will also continue to educate graduate and undergraduate students through the supervision of research activities. The award of this grant under the CAREER Faculty Early Career Development Program will support the educational and research activities described in this proposal. In particular it will allow the investigator and a graduate student to devote time to the integration of these activities. In addition it will enable increased collaboration with colleagues, in universities, government agencies and industry. The overall aim is to achieve the synthesis of more generalized models for the failure of advanced materials, and to communicate them in such a way as to inform and educate current and future generations of engineers.