Analytical solution of acoustic emission in soft material with cracks by using reciprocity theorem. (January 2023)

• Record Type: Journal Article
• Authors: Zhang, Han; Lin, Zhenyuan
• Is Part Of: Engineering fracture mechanics. Volume 277(2023)
• Publication Date: 2023-01
• Subjects: Soft materials -- Body forces -- Reciprocity theorem -- Acoustic Emission (AE); Fracture mechanics -- Periodicals; Rupture, Mécanique de la -- Périodiques; Fracture mechanics; Periodicals; 620.112605
• DOI: 10.1016/j.engfracmech.2022.108996
• Languages: English
• ISSNs: 0013-7944

Abstract

Highlights: It is given out the realization and application of the reciprocity theorem in acoustic emission of soft materials. Analytical solutions of acoustic emission for the micro-nano crack of rubber seal are given. The results show that we can define opening crack time function, cyclic frequency and elastic constant to access crack information. It is also provided a useful guidance for the detection and characterization of sealing ring rubber defects and other soft materials. Abstract: Special property in soft materials manifests itself as slight external action may occur significant changes in structure or performance followed by crack initiation and propagation. Characterizing the transition from a crack-free to a cracked soft material remains one of the most challenging problems in structural changes. New methods are needed to predict when and how these soft materials will fail due to defects. In this context, we explored the acoustic emission phenomenon of a crack generation with micro-nanometer size in rubber seal rings. We found through the reciprocity theorem and equivalent body forces that this tiny structural change is defined by the opening crack time function, crack opening body and elastic constant. We take rubber as an example and analyze the new application of acoustic emission and propose a methodology for near surface crack detection of soft materials. Additionally, we discuss the contributions of the opening crack time function, cyclic frequency and elastic constant. The present 'acoustic emission applications' strategy offers an effective pathway to observe soft materials' structural changes.