For applications studying fracture mechanical properties of concrete or the in-situ performance of cementitious materials non-destructive testing (NDT) and monitoring techniques (structural health monitoring, SHM) are beneficial. This will be demonstrated for a special application developing concrete exhibiting properties to heal or seal cracks (Jonkers 2011, Van Tittelboom et al. 2011). A deve...

BACKGROUND Interest in radiation-related health problems has been growing with the increase in the number of workers in radiation-related jobs. Although an occupational level of radiation exposure would not likely cause azoospermia, several studies have reported the relation between radiation exposure and azoospermia after accidental or therapeutic radiation exposure. We describe a case of azoo...

In order to improve manufacturing quality and ensure public safety, components and structures are commonly inspected for early detection of defects or faults which may reduce their structural integrity. Non Destructive Testing (NDT) and Evaluation (NDE) techniques present the advantages of leaving the specimens undamaged after the inspection. NDT involves treating defect detection and character...

Abstract As a promising non-destructive testing (NDT) method, magnetic flux leakage (MFL) has been widely used for steel structure inspection. However, MFL still faces great challenge to detect inner defects. Existing course researches mainly focus on surface-breaking defects while that of is overlooked. In the paper, investigated by building circuit models, performing numerical simulations, an...

Abstract The hollowing deterioration of stone relics required effective non-destructive testing (NDT) methods for their timely restoration and maintenance. To this end, a new NDT method based on terahertz (THz) technology by using support vector machine (SVM)-based learning models was developed to assess diagnose the Yungang Grottoes. According experiment design, series samples with various thi...

A wall climbing inspection robot has been designed to climb on safety critical concrete structures by adhering reinforcement steel bars (rebars) using permanent magnets generate the adhesion forces. Simulation and experimental validation performed determine optimum flux focusing magnet configurations with operating 30 35mm of cover over rebars arranged in different patterns. The goal force opti...

BACKGROUND/AIM We are developing a neutron dynamic therapy (NDT) with boron tracedrugs for a new mechanical-clearance treatment of pathotoxic misfolded, aggregated, and self-propagating prion-associated disease proteins. We present a compact neutron generator-based NDT using a boron tracedrug UTX-51. Our NDT is based on the weak thermal neutron-bombarded destructive action of UTX-51 on bovine s...

Fiber-reinforced polymer (FRP) composite materials have been widely used for retrofitting civil infrastructure systems. The ultimate goal of this study was to develop an in-site non-destructive testing (NDT) technique that can continuously and autonomously inspect the bonding condition between a carbon FRP (CFRP) layer and a host reinforced concrete (RC) structure, when the CRFP layer is used f...

Abstract: To ensure the rail transportations safety, evaluation of fatigue behavior of the rail steel is necessary. High cycle fatigue behaviour of a rail steel was the subject of investigation in this research using fracture mechanics. Finite element method (FEM) was used for analyzing the distribution of the stresses on the rail, exerted by the external load. FEM analysis showed that the ...