Acquisition of Instrumentation Used for the Non-Contact Measurement of Strains and Displacements on the Surface of Composite Materials with High Strain Gradients

OIA-0116494PI: Ronald BucinellInstitution: Union college标题：“用于高应变梯度复合材料表面应变和位移的非接触测量仪器”摘要：通过该资助获得的研究设备包括非接触应变测量仪器，该仪器将提供高应变梯度下复杂几何表面上的所有应变分量。一个云纹干涉仪和视频图像相关应变和位移测量系统将获得。云纹干涉仪在相对较小的区域内提供高分辨率应变和位移，视频图像相关系统在相对较大的区域内提供中等分辨率应变和位移。这些特点使这两个系统互为补充。这笔拨款还包括对一个20公斤的螺旋驱动机电负载框架的改造。此次改造将包括对载荷框架的修复、电子设备的升级、MTS TestStar控制软件的集成，以及一台运行载荷框架和收集数据的专用计算机。负载框架将配备用于安装非接触式应变装置的定制夹具，并将专用于使用该装置的项目。本科生研究是联合学院本科工程项目的支柱之一。许多联合学院的工程专业学生毕业后进入了工程专业的研究生课程。联合大学以实验室为基础的课程为学生在工程领域的职业生涯和研究生课程的继续学习做好了准备。该计划依赖于维护实验室设施，使学生接触到最先进的实验室设备的现状。购买的设备将用于支持PI和co-PI的研究项目，这些项目将广泛使用本科生。该设备将用于研究复合材料结构和试件的优化、表征和评估。该设备将允许对这些结构的应变和位移进行评估，并用于优化配置。能够利用这一成果的项目包括基础设施应用的复合网格结构研究，可重复使用运载火箭应用的材料性能评估，以及复合材料测试方法的开发。此外，该设备将用于研究整体材料的断裂行为。新设备为联合学院机械和土木工程专业的本科工程专业学生提供了在高应变梯度区域可视化复杂结构表面应变的机会，作为他们研究项目的一部分。这将给他们一个独特的机会来可视化这些领域，并能够将它们与有限元和其他结果进行比较。这个机会将帮助学生了解结构中应变的复杂性，并鼓励他们继续在工程力学领域探索机会。

OIA-0116494PI: Ronald BucinellInstitution: Union CollegeTitle: "Instrumentation Used for the Non-Contact Measurement of Strains and Displacements on the Surface of Composite Materials with High Strain Gradients"Abstract:The research equipment being acquired through this grant includes non-contact strain measuring apparatus that will provide all components of strain on complex geometric surfaces in the presence of high strain gradients. A Moire interferometer and video image correlation strain and displacement measuring systems will be acquired. The Moire interferometer provides high-resolution strain and displacements over a relatively small area and the video image correlation system provides medium-resolution strains and displacements over a relatively large area. These features make the two systems complementary. Also included in this grant is the renovation of a 20kip screw-driven electro-mechanical load frame. The renovation will include a rehabilitation of the load frame, upgrading of the electronics, integration of MTS TestStar control software, and a dedicated computer to run the load frame and collect data. The load frame will be fitted with custom fixtures for mounting the non-contact strain apparatus and it will be dedicated to projects that utilize this apparatus.Undergraduate research is one of the pillars of Union College's undergraduateengineering programs. Many of Union College's engineering students graduate and enter graduate programs in engineering. Union's laboratory based curriculum prepares students well for careers in engineering and continued studies in graduate programs. This program relies on maintaining laboratory facilities that expose students to the current state of the art laboratory equipment. The equipment being purchased will go to support the PI and co-PI's research programs that make extensive use of undergraduate students. The equipment will be used to investigate the optimization, characterization, and evaluation of composite structures and test specimens. This equipment will allow for strains and displacements on these structures to be evaluated and used to optimize the configurations. Programs that will be able to take advantage of this effort include the study of composite grid structures for infrastructure applications, evaluation of material performance for reusable launch vehicle applications, and for the development of composite material test methods. Additionally the equipment will be used to investigate the fracture behavior of monolithic materials.The new equipment provide undergraduate engineering students in the mechanical and civil engineering programs at Union College the opportunity to visualize surface strains on complex structures in regions of high strain gradients as part of their research projects. This will give them a unique opportunity to visualize these fields and be able to compare them to finite element and other results. This opportunity will help students to understand the complexity of strain in structures and encourage them to continue their education exploring opportunities in the field of engineering mechanics.