This study evaluates changes in hardness and estimates the reduction in tensile strength of BJ37 structural steel after exposure to elevated temperatures of 250 C and 500 C using the Leeb hardness non-destructive testing (NDT) method. Since hardness is closely related to mechanical properties, the Leeb test can be used as an indirect approach to estimate tensile strength without damaging the…
Advances in smart materials have made it possible to develop shape-changing wing concepts as alternatives to traditional high-lift systems. In this study, the aerodynamic effects of linear beam extension on a NACA 0015 wing profile with an initial beam length of 150 mm were numerically investigated. The linear actuation mechanism applied along the chord direction resulted in a reduction in the…
Cancer is still a major health concern, particularly in areas like Iraq with inadequate healthcare systems, where survival rates depend on early and precise diagnosis. Using clinical text data from radiology reports in Mosul, Iraq, this study examines the use of Natural Language Processing (NLP) and Machine Learning (ML) models for cancer diagnosis and classification. In order to categories cancer…
Natural convection heat transfer in corrugated enclosures has attracted increasing attention due to its importance in thermal management applications. However, the combined effects of wall corrugation, porous media, ethylene glycol-based nanofluids, and magnetic field control have not been sufficiently addressed. In the present study, a numerical investigation is carried out to analyze…
This work examines notch sensitivity in fiber-reinforced polymer composites, with attention to the role of fiber orientation and notch width. CFRP and GFRP specimens were fabricated by vacuum-assisted resin transfer molding (VARTM) using thermoset resin systems. The tested variables were fiber orientation (0o and 90o), notch width (0, 2, 4, and 6 mm), and tensile tests were carried out according…
Interlayer bonding strength is a critical factor influencing the durability and performance of asphalt pavement systems. This study investigates the combined effects of tack coat type, application rate, and substrate surface texture on the interfacial shear strength (ISS) between asphalt layers. Four surface conditions, new wear, binder, aged-worn, and milled, were simulated to represent varying…
Enhancing and retrofitting existing structural components is a critical process that aims to restore or improve the performance, safety, and durability of constructions. Foundations in particular can be susceptible to damage, failures, or differential settlements for a number of different reasons, including improper design parameters, lack of soil investigations, additional weights produced by…
This study aims to experimentally investigate the two-way shear performance of high-strength concrete flat slabs containing integrated ducts. A total of eight slab specimens containing ducts were manufactured, along with one solid slab functioning as the reference. The experimental program focused on two primary parameters: the horizontal distance of the duct opening from the column face…
Pervious concrete is an environmentally friendly paving concrete that has attracted significant attention due to its environmental advantages, particularly in mitigating the influences of urban heat and improving stormwater runoff. This study aims to investigate the influence of three types of lightweight coarse aggregates on the physical properties of pervious concrete mixtures. These types are…
Construction and demolition waste is recognized as a major waste stream made by humans around the world. The use of crushed old concrete in a type of recycled aggregate concrete (RAC) has been a promising technique to promote construction sustainability. However, the mechanical behaviors and the durability of RAC are inferior to those of concrete incorporating natural aggregate. Therefore, the…
