Ultrasonic testing can be used for a nondestructive and rapid determination of material properties. In this study, twelve asphalt mixture samples four different types were fabricated in conventional property tests two ultrasonic wave tests. Physical properties such as bulk specific gravity air void content, mechanical dynamic modulus phase angle, acoustic velocity measured. Relationships betwee...

The paper considers the ways and methods of determining strength wood according to current norms rules. required number samples are tested compared with characteristics in SP 64.13330.2020 “Wood structures”. It is concluded that it impossible use obtained results for calculations building structures, due lack coefficients norms, taking into account vices scale factor. existing nondestructive co...

We investigate the possibility of nondestructive electron diffraction imaging of a single molecule to determine its structure. The molecular specimen will be held on a free-standing sheet of graphene. Due to the high conductivity of graphene, electrons lost by ionization would be rapidly replaced, enabling repeated nondestructive interrogation. Limits of resolution, maximum particle size and re...

The effect of joint size on the loading capacity of wood single lap joints was studied with an orthogonal experimental design. The maximum load, modulus of elasticity, and modulus of rupture were the three mechanical indexes used to evaluate wood joint quality. A simulation model of bending tests was established using the finite element method. The stress distributions of the joints were analyz...

Nondestructive tests, commonly employed in rock mechanics, estimate mechanical parameters without affecting the rocks situ properties. This study evaluates non-destructive tests (ultrasonic pulse velocity and Schmidt hammer) for forecasting strength physical properties of used rocks. Weathering grades moisture content are provided as variables that produce variances both tests. The coefficient ...

Ultrasonic pulse velocity (UPV) and rebound hammer (RH) tests are often used for assessing the quality of concrete and estimation of its compressive strength. Several parameters influence the property of concrete, such as the type and size of aggregates, cement content and the implementation of concrete. To account for these factors, both of the two tests are combined and their measurements are...

Fatigue cracking of viscoelastic asphalt composite materials is one the major distresses in pavements. To quantify weakening effect fatigue cracks on mechanical properties materials, this study takes an asphalt-filler system as example, and micromechanics models are proposed by combining Eshbely’s equivalent inclusion theory Mori-Tanaka approach. Dynamic shear rheometer (DSR) tests performed sy...

tomato is a major fruit, as well as a major food science product. there is a need of determining the quality attributes of this fruit (nondestructively) due to the increasing demand of the in agro-industrially controlled areas. most of the commonly employed techniques are time consuming and involve a considerable degree of manual work. sample preparation, juice making, and laboratory tests ...