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Evolution of QNDEs Core Interdisciplinary Science and Engineering Base

摘    要
对材料和结构缺陷的无损检测(NDT)已经历了50多年的进化演变。在美国, 它已经从一个要求零缺陷的检测策略(NDT), 向基于损伤可容度设计的检测和评估技术(NDE)过渡。这里是假设部件始终包含一个缺陷, 只有那些比断裂力学确定的临界尺寸更大时, 需要通过检查将其消除, 以重新确定产品的服务周期。介绍了这些因素对于推动模式转变及转换至定量无损检测方面起到的至关重要的作用。一系列的重大研究项目被启动, 用于更新无损检测以满足新的要求。重点介绍了在第一项目发展中的研究重点, 以及用于定量缺陷定义的DARPA/AFML跨学科项目。它有三个目的: 发展新的核心科学/人员基础, 使检测技术满足新的要求, 确立发展新的领域, 即适当的工程设备的阶段, 并继续开展定量无损检测(QNDE)系列会议。从这个和其他方案的进展已导致对所涉及的任何检查和技术的各项测量的基本模型的链接为基础的定量无损评价(QNDE)的科学核心。除了讨论这些模式和它们的联系, 还将定义核心结构。利用这些模型, 一种新的强大的工程工具集已经开发, 包括UT, RT和EC技术的模拟程序。这些工具的应用将成为亮点, 在包括结构健康监测和状态检修的工作中将令人注目。最后, 讨论了QNDE未来机会、远景和方向。
标    签 无损检测   无损评价   定量无损评价   超声   学科基础   工程技术   NDT   NDE   QNDE   Ultrasonics   Science Base   Engineering Technology  
Nondestructive testing (NDT) for flaws in materials and structures has undergone an evolutionary change over the past 50 years. In the U.S. it has moved from a testing strategy (NDT) with a zero defects requirement to a test and evaluate procedure (NDE) based upon damage tolerant design considerations. Here it is assumed that the part will always contain defects but those greater than a critical size, specified by fracture mechanics, will be removed by inspection thereby resetting the parts service clock. In this talk, events will be identified that were critical in promoting this paradigm shift and in the development of a quantitative NDE (QNDE) technology. A number of major research programs were initiated to upgrade NDT to meet the new requirements; principal attention in this talk will be given to research highlights begun in the DARPA/AFML Interdisciplinary Program for Quantitative Flaw Definition that was initiated by the author. Its purpose was threefold: to develop a new core science/people base for inspection technology that could meet the new requirements, to set the stage for new field - adaptable engineering tools, and to initiate a continuing series of quantitative NDE (QNDE) research meetings. Advances initiated in this program and pursued by many over the years have resulted in a scientific core structure for quantitative NDE (QNDE) based on a linkage of fundamental models of the various measurement processes that are involved in any inspection and/or technology. These models and their linkage will be discussed and the core structure defined. A new and powerful set of engineering tools - i.e. simulation programs for UT, X-ray, and EC technologies–has also been developed using these models. Applications of these tools will be highlighted and their role in other advanced programs including Structural Health Monitoring and Condition-Based Maintenance will be noted. Finally, a discussion of visions of future opportunities and directions for QNDE will be given.

中图分类号 TG115.28


所属栏目 2010年远东无损检测论坛论文精选






引用该论文: Donald O. Thompson. Evolution of QNDEs Core Interdisciplinary Science and Engineering Base[J]. Nondestructive Testing, 2010, 32(8): 571~583
Donald O. Thompson. QNDE的核心科学与工程基础进展[J]. 无损检测, 2010, 32(8): 571~583

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