Fracture Toughness Testing of Engineering Materials Using Hybrid Quantitative Nondestructive Techniques

使用混合定量无损技术测试工程材料的断裂韧性

• 批准号: 9060228
• 负责人: Adel Sarrafzadeh
• 金额: $ 5万
• 依托单位: American Research Corporation of Virginia
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-01-01 至 1991-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9060228&HistoricalAwards=false
• 关键词: Fracture; Toughness; Testing; Engineering; Materials

The proposed instrumentation using the combined ultrasonic attenuation and speckle image correlation strain measurement techniques addresses these problems by providing a compact, rapid and robust nondestructive examination system for evaluating the material macroscopic properties and surface crack-opening displacements at critical locations on the full scale operating structures. Extension of the fundamental correlation between analytical ultrasonic nondestructive evaluation and mechanical performance, evaluation of a rugged ultrasonic attenuation measurement system, integration of speckle correlation-based strain sensing device.

所提出的仪器采用超声衰减和散斑图像相关应变测量技术相结合，通过提供一个紧凑、快速和强大的无损检测系统来评估材料宏观性能和全尺寸运行结构关键位置的表面裂纹张开位移，解决了这些问题。扩展了分析超声无损评价与力学性能之间的基本相关性，评价了一种坚固的超声衰减测量系统，集成了基于散斑相关的应变传感装置。