In inspecting steel-rubber multi-layered structure, shielding of steel layer and intense attenuation of rubber layer result in ultrasonic echo from the interfaces of the deep layers being very weak. In order to overcome the difficulty, the double mode testing method is put forward. This method synthesizes the characteristics of transverse wave and Lamb wave testing. In the double modetesting tr...

Background & Aims: Today, different imaging techniques have been studied in the reading of radiationsensitive polymer gels dosage. Due to limitations of imaging techniques such as magnetic resonance imaging (MRI) and computed tomography (CT), ultrasound techniques are proposed for dose-dependent parameter extraction. In this study, using MAGIC-f (methacrylic and ascorbic acid in gelatin initiat...

Corrosion is a relatively slow material degradation process to which metallic structures of aircraft are subjected during service and it can appear in many forms. Generally, corrosion protection for preventing or inhibiting the formation and growth of corrosion damage on aircraft structures is well-established technology. Unfortunately, despite preventive measures, corrosion does occur and its ...

The technique of cryogenic treatments requires injecting extremely cold fluids such as liquid nitrogen (LN2) into formations to create fractures in addition connecting pre-existing fracture networks. This study investigated the effects implementing and pressurizing treatment on physical (porosity permeability) mechanical properties (Young’s modulus, Poisson’s ratio, bulk compressibility) Marcel...

Ultrasonic nondestructive testing based on pulse-echo measurements cannot detect faults if there is no reflected energy. Faults that are hidden behind an obstacle (for instance, another fault), or faults angled along the direction of beam propagation reflect negligible energy and will be difficult to detect. Thus, for a thorough examination of 3-D structures, pulse-echo data is collected from t...

Flexible ultrasound array with phased configurations have individually controllable element emission and reception acoustic properties, however conventional processes design are too complex. It is necessary to explore rapid creation methods potential applications for flexible arrays. In this paper, we provide a method fabrication of transducers based on laser micromachining verify the performan...

Direct removal of beak-type ossification of posterior longitudinal ligament at thoracic spine (T-OPLL) is a challenging surgical technique due to the potential risk of neural injury. Slipping off the cutting surface of a high-speed drill may result in entrapment in neural structures, leading to serious complications. Removal of T-OPLL with an ultrasonic osteotome, utilizing back and forth micro...

The present paper studies the low-velocity impact testing of carbon-fibre reinforced-plastic (CFRP) pristine and patch-repair CFRP panels. Firstly, effect repeated impacts on damage growth is considered at energies 7.5, 10.5 30 J. Secondly, such tests lead to a single-sided, panel being manufactured by removing 40 mm diameter central hole, act as ‘damaged area’, from parent then adhesively-bond...