Fracture-Induced Acoustic Emissions in Gelatin
Fracture-Induced Acoustic Emissions in Gelatin
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DOI：
10.1007/s11340-022-00933-8
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发表时间：
2022-12-14
影响因子：
2.4
通讯作者：
Eriten，M.
中科院分区：
文献类型：
--
作者：
Yerrapragada，K.;Chawla，D.;Eriten，M.
背景软膨胀（多相）材料在工程和医疗应用中的日益增长的使用需要监测，理解和建模其机械行为。能量裂纹成核和扩展在确定此类材料的承载能力和韧性方面是必不可少的。因此，高吞吐量和强大的测试技术需要开发用于测量软膨胀materials.ObjectiveTo解决上述需要，目前的研究旨在探讨从明胶样品表面裂纹释放的声发射（AE）和探索AE特性和机械（主要是故障）性能的测试样品之间的联系。在陶瓷、复合材料和金属等硬质材料中，局部压痕裂纹产生的AE能量与成核能量成正比。然而，据作者所知，软膨胀材料的断裂和AE属性之间的相关性研究是目前literation.MethodsSynchronous多点振动测量（MPV，非接触）是用来获得可靠的表面波信息（简称AE）从明胶样品上的准静态压痕引起的裂纹发射。从软材料的AE的非接触式传感是必不可少的，在消除传感器附件引起的质量和刚度effects.ResultsSeveral属性的AE信号，如能量，持续时间，上升时间进行了分析和相关的准静态弹性和断裂性能的明胶samples.ConclusionsSpecifically，幂律型相关性之间的AE和断裂能被发现明胶和硬材料在文献中相比。
BackgroundThe ever-growing use of soft swollen (multiphasic) materials in engineering and medical applications necessitates monitoring, understanding, and modeling of their mechanical behavior. Energy-to-crack nucleation and propagation are essential in determining load-carrying capacity and toughness of such materials. Therefore, high-throughput and robust testing techniques need to be developed for measuring failure properties of soft swollen materials.ObjectiveTo address the above need, the current study seeks to investigate the acoustic emissions (AE) released from surface cracks on gelatin samples and explore links among AE characteristics and mechanical (mostly failure) properties of the tested samples. In hard materials such as ceramics, composites, and metals, localized indentation cracks generate AE energies proportional to nucleation energies. However, to the best knowledge of the authors, a correlation study between fracture and AE properties on soft swollen materials is currently missing in the literature.MethodsSynchronous Multi-Point Vibrometry (MPV, non-contact) is used to obtain reliable surface wave information (referred to as AE) emitted from cracks induced by quasistatic indentations on gelatin samples. Non-contact sensing of AE from soft materials is essential in eliminating sensor attachment induced mass and stiffness effects.ResultsSeveral properties of the AE signals such as energy, duration, rise time are analyzed and correlated to quasistatic elastic and fracture properties of the gelatin samples.ConclusionsSpecifically, a power-law type correlation is found between AE and fracture energies is found for gelatin and compared with hard materials in the literature.