Acquisition of 500 kN (110 kip) Servo-Hydraulic Test Machine

购置 500 kN (110 kip) 伺服液压试验机

• 批准号: 0521667
• 负责人: Daniel Jansen
• 金额: --
• 依托单位: California Polytechnic State University Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-08-01 至 2006-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0521667&HistoricalAwards=false
• 关键词: Acquisition; 500; kN; 110; kip

ABSTRACTThis Major Research Instrumentation grant is for the acquisition of a 500 kN (110,000 lbs.) capacity servo-hydraulic tension/compression test machine with the ability to apply cyclic loading. The test machine will have a cross-head mounted actuator for maximum flexibility in the types of samples which can be tested. The open space between the load cell and the base is three meters, allowing for testing of long specimens. In addition to inputs for the load and stroke, there are additional channels with two universal conditioners and six channels of preconditioned (DC) input; all channels can be used as feedback control or even a combination of signals. The primary uses for the test machine will be for senior projects and research for Master's theses. The PIs have specific ongoing or proposed research in the following areas in which the intellectual merit of the work would benefit by the unique capabilities of the new test machine: (1) effect of failure localization on compressive stress-strain behavior of concrete, (2) quantification of the initiation and growth of cracks in reinforced concrete members (3) determination of the resilient modulus of paving materials, (4) fatigue and strength testing of mechanical joints, and (5) compression tests of filament wound composite tube struts. The test machine being acquired fills a gap in the testing ability for the entire College of Engineering at the California Polytechnic State University at San Luis Obispo. The PI and co-PIs represent three different Departments within the College of Engineering. Civil and Environmental Engineering already has test machines with greater and lesser load capacity; however, none of the test machines have the ability to apply cyclic loads or control brittle fracture of specimens using feedback signals. Aerospace and Mechanical Engineering Departments both have servo-hydraulic test machines with cyclic tension/compression abilities and closed-loop feedback control; however, the largest capacity machine in each department is 100 kN (22,000 lbs.). The proposed test machine will also have greater clear space between loading surfaces than any of the current testing facilities.The students and the local community will both be beneficiaries of the broader impact of acquiring the test machine. Cal Poly has one of the largest non-PhD granting engineering colleges in the country with undergraduate enrollments exceeding 4500 and a growing master's program. Coupling Cal Poly's requirement that every student must complete a senior project and its "hands-on" philosophy, the new instrument will be a valuable asset in helping numerous students understand what state-of-the-art test equipment is capable of and helping them better understand the mechanical behavior of materials. Furthermore, much of the research conducted at Cal Poly is of a practical nature, serving the needs of industry and public agencies within the state. Attracting funding also helps the local community which is isolated from major metropolitan areas and has little industry other than the University.The test machine will be located in the new Paving Materials and Advanced CE Materials Lab. This laboratory will be operated under the joint supervision of the PI and one of the co-PIs. This laboratory is housed in Building 13 on the Cal Poly campus. Building 13 is the primary location for the Civil, Mechanical, and Aerospace Engineering Departments; their Department offices, laboratories, and faculty are mostly contained within this building providing easy access to the equipment. The PI has extensive research experience with closed-loop testing at other institutions; he has developed unique closed-loop test techniques which allow for measurements which would not otherwise be obtainable. The PI will be the primary operator and will provide training to those using the equipment so the full capabilities of the machine will be utilized. The Civil and Environmental Engineering Department will the responsible party for regular maintenance and calibration of the test machine.

这一主要研究仪器赠款是为收购一个500千牛（110,000磅）。容量伺服液压拉伸/压缩试验机，能够施加循环载荷。试验机将有一个十字头安装的致动器，以最大限度地灵活性，在类型的样品，可以测试。 测力传感器和底座之间的开放空间为3米，可用于长样本的测试。除了负载和行程的输入之外，还有额外的通道，包括两个通用调节器和六个预调节（DC）输入通道;所有通道均可用作反馈控制甚至信号组合。测试机的主要用途将是高级项目和硕士论文的研究。PI在以下领域有具体的正在进行或拟议的研究，其中工作的智力价值将受益于新测试机的独特功能：（1）破坏局部化对混凝土压缩应力-应变行为的影响，（2）钢筋混凝土构件中裂缝的产生和扩展的量化，（3）铺路材料的回弹模量的测定，（4）机械接头的疲劳和强度测试，和（5）纤维缠绕复合材料管支柱的压缩测试。获得的测试机器填补了圣路易斯奥比斯波加州理工州立大学整个工程学院测试能力的空白。 PI和co-PI代表工程学院内的三个不同部门。 土木和环境工程已经有了负载能力更大和更小的试验机;然而，没有一台试验机能够施加循环负载或使用反馈信号控制试样的脆性断裂。 航空航天和机械工程部门都有伺服液压试验机，具有循环拉伸/压缩能力和闭环反馈控制;然而，每个部门的最大容量为100 kN（22，000 lbs.）。 与现有的任何测试设施相比，拟议的测试机器在加载表面之间也将有更大的净空间。学生和当地社区都将受益于获得测试机器的更广泛影响。 加州理工学院拥有全国最大的非博士授予工程学院之一，本科招生人数超过4500人，硕士课程不断增加。 结合Cal Poly的要求，即每个学生必须完成一个高级项目及其“动手”理念，新仪器将成为帮助众多学生了解最先进的测试设备的价值资产，并帮助他们更好地了解材料的机械行为。 此外，在加州理工学院进行的大部分研究都具有实用性，满足该州工业和公共机构的需求。 吸引资金也有助于当地社区，该社区与主要大都市区隔离，除了大学之外几乎没有工业。测试机器将位于新的铺路材料和先进CE材料实验室。该实验室将在主要研究者和其中一名合作主要研究者的联合监督下运行。 该实验室位于Cal Poly校园的13号楼。 13号楼是土木，机械和航空航天工程部门的主要位置;他们的部门办公室，实验室和教师大多包含在这座大楼内，方便使用设备。 PI在其他机构的闭环测试方面拥有丰富的研究经验;他开发了独特的闭环测试技术，可以进行无法获得的测量。 PI将是主要操作员，并将为使用设备的人员提供培训，以便充分利用机器的功能。 土木及环境工程署将负责测试机器的定期保养及校正。