Assessing the Onset of Failure Through Acoustic Emission

CMS-9532061由混凝土和岩石等脆性材料组成的系统的破坏由称为损伤的微缺陷的发展和积累控制。宏观上，损伤降低了弹性刚度，引起各向异性，降低了材料的承载能力。这项研究的目的是通过声发射(AE)技术识别损伤，并使用这种损伤测量来评估由岩石类材料组成的系统的破坏开始。对于根据脆性材料的强度来定义其行为，损伤的累积具有基本的重要性。此外，由于高强度混凝土的使用、保护经典古迹的紧迫性以及评估骨料耐久性的需要，检测结构脆性破坏的重要性也随之而来。据称，通过简化确定震源机制和取向的反卷积过程，可以对全尺寸结构的部件进行损伤的定量分析。这项研究对基础设施的影响将是对系统的实时监控，以评估以裂缝、空洞、粘合丢失和其他导致故障的有害过程形式的损害。***

CMS-9532061 The failure of systems composed of brittle materials such as concrete and rock is controlled by the development and accumulation of microdefects referred to as damage. Macroscopically, damage reduces the elastic stiffness, causes anisotropy, and reduces the load-carrying capacity of the material. The objective of this research is to identify damage through the acoustic emission (AE) technique and to use this measurement of damage to assess the onset of failure in systems composed of rock-like materials. The accumulation of damage has a fundamental importance for defining the behavior of brittle materials in terms of their strength. In addition, the importance of detecting brittle failure of structures is brought on by the use of high-strength concrete, by the urgency in preserving classical monuments, and by the need to evaluate aggregate durability. It is claimed that a quantitative analysis of damage can be applied to components of full-scale structures by simplifying the deconvolution process for determining source mechanisms and orientations. The impact of this research on the infrastructure will be the real-time monitoring of systems to evaluate damage in the form of cracks, voids, loss of bond, and other detrimental processes leading to failure. ***