Advances in Acoustic Emission Technology pp 293-301 | Cite as
Deflection on Hit-Count Curves in Acoustic Emission Could Reflect the Damage Extent of C/C Composite Material Structure
Abstract
Counts of each hit are related to the damage extent of C/C composite material structure. The relative curves of Hit and Count as well as Hit and Energy of AE, attained from static load procedure of C/C composite structure, could reflect the severity of damage extent in a quite noticeable way—the ascending curves of Hit and Count as well as Hit and Energy deviate from their prior linearity and deflection point appears in a sudden when more severe damage occurs; and the ratio of load at this time to the final fracture load is steady for a certain structure. This method could early warn the failure of C/C composite structure effectively and estimate the fracture load. This phenomenon could also provide some suggestion to interpret the evolution of damage field of composite structure.
Keywords
Acoustic Emission Stress Wave Acoustic Emission Signal Acoustic Emission Event Fiber BreakageReferences
- 1.Y. Mingwei, G. Rongsheng, Acoustic Emission Detection[M] (Mechanic Engineering Publishing, Beijing, 2004)Google Scholar
- 2.Y. Guangsong, Damage Mechanics and Damage of Composite Materials[M] (National Defense Publishing, Beijing, 1995)Google Scholar
- 3.M. Songhe, T. Xiaoxiao, D. Shanyi, Mechanical properties testing and failure mechanism analysis of 3D woven carbon/epoxy composite[J]. Acta Mater. Comp. Sinica. 2, 115–119 (2012)Google Scholar
- 4.Q. Gang, F. Ming, The dominance of the antinomy between the inherent structure and irreversible damage in evaluating material’s performance[J]. J. Dialectics Nat. 2, 118–218 (2012)Google Scholar