Ricerc@Sapienza

The documentation of built heritage involves tangible and intangible features. Several morphological and metric aspects of architectural structures are acquired throughout a massive data capture system, such as the Terrestrial Laser Scanner (TLS) and the Structure from Motion (SfM) technique. They produce models that give information about the skin of architectural organism. Infrared Thermography (IRT) is one of the techniques used to investigate what is beyond the external layer. This technology is particularly significant in the diagnostics and conservation of the built heritage.

Nowadays, infrared thermography, as a widely used non-destructive testing method, is increasingly studied for impact evaluation of composite structures. Sparse pattern extraction is attracting increasing attention as an advanced post-processing method. In this paper, an enhanced sparse pattern extraction framework is presented for thermographic sequence processing and defect detection.

With a view to gaining an in-depth assessment of the response of particleboards (PBs) to different in-service loading conditions,
samples of high-density homogeneous PBs of sugarcane bagasse and castor oil polyurethane resin were manufactured and
subjected to low velocity impacts using an instrumented drop weight impact tower and four different energy levels, namely
5, 10, 20 and 30 J. The prediction of the damage modes was assessed using Comsol Multiphysics. In particular, the random

In this paper, eddy current pulsed thermography was used to evaluate ballistic impact damages in basalt-carbon hybrid fiber-reinforced polymer composite laminates for the first time, to our knowledge. In particular, different hybrid structures including intercalated stacking and sandwich-like sequences were used. Pulsed phase thermography, wavelet transform, principle component thermography, and partial least-squares thermography were used to process the thermographic data. Ultrasound C-scan testing and X-ray computed tomography were also performed for comparative purposes.

Natural fibers, including mineral and plant fibers, are increasingly used for polymer composite materials due to their low environmental impact. In this paper, thermographic non-destructive inspection techniques were used to evaluate and characterize basalt, jute/hemp and bagasse fibers composite panels. Different defects were analyzed in terms of impact damage, delaminations and resin abnormalities. Of particular interest, homogeneous particleboards of sugarcane bagasse, a new plant fiber material, were studied.

This study is devoted to the analysis of impact damage in composite samples by applying techniques of IR and
Terahertz imaging. The samples made of high-density homogeneous particleboards of sugarcane bagasse and
castor oil polyurethane resin were subjected to impacts with the energy from 5 to 30 J. The impact damage
defects were evaluated by applying one- and two-sided thermal non-destructive testing. Both the apparent
thermal effusivity and diffusivity were determined to analyse their relationship to impact energy. In the abovementioned