Abstract
The diffusion of composite materials in aeronautical and aerospace applications is attributable to the high specific mechanical properties they offer. In particular, the recent use of Carbon Fiber Reinforced Polymer (CFRP) materials is highly increased. The main disadvantage in using this kind of material is related to the possibility of including damages or defects not visible on the surface that compromise their behavior and make their use extremely unsafe if not properly supervised. The most conventional nondestructive techniques allow the detection of damages when they already compromise the life of these materials. The use of the same techniques makes it harder to monitor in-situ of the progress of damages, especially if they occur inside the materials. The implementation of the innovative strain analysis method, like those based on full-field measurements, could provide additional information about the damage mechanisms by supplying the complete strain distribution of the surface of the sample. The present paper examines the mechanical behavior of two different CFRP specimens, with and without damage, subjected to compressive load in an anti-buckling fixture by using the Digital Image Correlation (DIC). The purpose is to measure the out-of-plane displacements, characteristics of the compression tests, in all the points of the ROI (Region of Interest), using a full-field and noncontact technique. The innovative aspect of this work is therefore to solve this problem through an experimental approach with DIC 3D technique.
Highlights
Composite materials are carried out by combining two or more materials with dissimilar mechanical and physical properties
Uniaxial compression tests on Carbon Fiber Reinforced Polymer (CFRP) and foams, damaged and undamaged, are shown
6–9, the obtained different instant timesinduring the Referring to the laminate specimens and from the analysis of the out-of-plane displacements, uniaxial compression tests on CFRPs and foams, damaged and undamaged, are shown
Summary
Composite materials are carried out by combining two or more materials with dissimilar mechanical and physical properties. Provided the matching is well done, the final material will have better overall properties if compared to the parents. A well-consolidated class of composite materials is obtained by using a matrix material combined with a reinforcing one. In this way, it is possible to obtain a continuous material with increased capability of loading transmission and higher resistance. From a classification point of view composites can be considered anisotropic, nonhomogeneous materials, in which each of the constituting materials is inextricably connected with the others.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
