Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 International Journal of Applied Mechanics and Engineering

2 2025

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Sensitivity analysis and uncertainty quantification of stiffness modulus using indirect tensile test

Mezouara H., Zniker H., Feddal I., El Kouifat M. K., El Hasnaoui M.

International Journal of Applied Mechanics and Engineering

2025

Vol. 30, no. 2

105--123

The stiffness modulus is a critical element in pavement engineering, as its accurate measurement directly reflects the load-bearing capacity of the pavement section. Many researchers utilize indirect tensile tests in laboratory studies to determine this modulus. The pavement's performance, as well as other properties of the pavement layers, can be directly influenced by this modulus. It also provides insights into the resistance of the asphalt mix to permanent deformation due to repeated loads, a common issue in flexible pavements. The stiffness modulus holds a significant role in pavement and pavement materials-related works and designs. This research aims to address uncertainties in stiffness modulus measurements of asphalt mixtures, which can lead to unreliable results and poor decisions in pavement construction. The paper presents theoretical and experimental findings on the uncertainty and sensitivity analysis in identifying influential parameters in stiffness modulus measurement. Key factors such as experimental setup, interface roughness, sample shape, and plate-sample contact were evaluated for their impact on measurement uncertainty. The study found that test repeatability is the primary contributor to measurement error, accounting for approximately 79.72%, followed by thickness measurement, contributing around 19.75%.

Prediction of degradation in 90° elbow joints of ba35 brass used in potable water pipes through computational fluid dynamics (CFD) simulation

Bennis H. T., Zniker H., El Kouifat M. K., Bennajah M., Ouaki B.

International Journal of Applied Mechanics and Engineering

2025

Vol. 30, no. 2

46--61

Failure of 90° elbows in water pipes due to corrosion is a critical issue in water supply and distribution systems. Therefore, understanding the behavior of pipelines under corrosion is essential to increase their durability. This original study aims to specifically analyze the failure of 90° elbows due to the erosion-corrosion phenomenon. The behavior of water flow, in terms of velocity profile, pressure gradient, and turbulence zones at these elbows, is numerically simulated using the computational fluid dynamics (CFD) method. The simulations, performed with FLUENT software, identify the areas most susceptible to erosion and corrosion, thus contributing to a better understanding of processes such as stress corrosion cracking and cavitation. This work also highlights the importance of designing elbows with suitable characteristics and adopting adequate maintenance practices to prevent failures. These results can serve as a basis for future experimental validations and for the design of more robust pipeline systems.