This chapter explains the main sources and types of damage and reviews the fundamental failure theories for polymer matrix fiber-reinforced composites. Other types of damages such as impact damage, fastener hole damage, and damage allied with sandwich structures and adhesive joints are also reviewed....
composites laminatesacoustic emissionRelief FEM-GMM feature selectiondamage characterizationFAILURE MODESIDENTIFICATIONDELAMINATIONDAMAGESSIGNALSThe present study aimed to find a method with higher efficiency to cluster acoustic emission events. The acoustic emission signals of composite laminates with different ...
Further the air void structure was investigated using a microscopic technique in which air 'bubble' size distributions and the so-called spacing factor, indicating the mean distance between air bubbles, were measured. By analyzing the experimental result, it is concluded that damages occur in the ...
The two structures used in this work are representative for real aircraft components. Comprehensive measurements were recorded in order to study (I) the impact of the omega stringer on guided wave propagation, and (II) elliptical reference damages of different sizes located at three separate ...
Under high-rate impact loads, concrete structures may have localized failure modes and damages, including brittle spalling, scabbing, perforation, and punching shear failure [35], as shown in Figure 1. Figure 1. Failure mode under different impact loads [35]. A study by [35] summarized the...
Minarets are slender and tall structures that are built from different types of materials. Modern materials are also starting to be used in such structures with the recent developments in material technology. The seismic vulnerability and dynamic behavior of minarets can vary, depending on the materia...
The mechanical properties of GLARE have been extensively studied, and the lower modulus and strength of the glass fiber limited its application in load-bearing structures [13,14]. Consequently, CArbon fiber Reinforced composites/Aluminum Laminates (CARALLs), which are a combination of metal alloys ...
Using a supporting plate showed a reduction of delamination type I but not for delamination type II, which is related to edge rounding. Keywords: drilling; tool wear; coating; hybrid composite; glass fiber 1. Introduction Hybrid composites combine more than one kind of fiber in the same ...
This test method can be performed in accordance with ASTM C1202 [35]. 2.2.8. Electrical Resistivity on Surface (ERoS) To evaluate concrete compactness and the durability of cement composites in an HPC sample, the ERoS can be measured. The higher the electrical resistance, the more compact ...
Many studies on p-SWCNTs show that they exhibit higher in vitro and in vivo toxicity in biological systems compared with other G derivatives, because their fiber shape can cause cellular damages. Furthermore, the carbon nanotubes contain contaminants, such as heavy metals (employed as catalysts ...