On fatigue life prediction of Al-alloy 2024 plates in riveted joints

Abstract

The purpose of this paper is to numerically investigate the fatigue life and the fatigue crack growth path of 2024 aluminum plate riveted joints. For this purpose, according to field observations, the parameters affecting fatigue life are obtained. Relevant geometric parameters such as rivet shank length, hole diameter and dimensional tolerances, as well as the location pattern of the rivets and the material of the rivet joints are studied. In this study, modeling is performed to calculate the equivalent plastic strain using the finite element method. For this purpose, a three-dimensional elastoplastic model is used for simulation. The information obtained from the finite element method in this study made it possible to place the rivets in this type of joint for use in high safety structures such as the aerospace industry. Given the importance of the problem of crack growth in 2024 aluminum plates, having the geometrical and physical parameters of the problem, the goal is to achieve the exact path of crack growth and fatigue life of riveted joints. Fatigue crack growth simulation is performed on the samples using the boundary element method. The stress intensity factor for different loading modes is determined using the boundary element method. The results showed that the geometric parameters and the rivet material have a significant effect on fatigue cracking in aluminum plates.

Techno-Economic Planning and Operation of the Microgrid Considering Real-Time Pricing Demand Response Program

“…Traditional fossil fuel-based power plants are not able to provide the power demand [17][18][19][20][21][22][23][24], and blackouts are inevitable, especially in the hot months of the year [25][26][27][28][29][30][31][32][33]. Meanwhile, renewable energy sources (RESs) are one of the efficient solutions for dealing with such an important issue [34][35][36][37][38][39][40][41][42][43]. In fact, Iran benefits from high-capacity potentials of solar energy with over 310 days with adequate sunlight and an average irradiance of 4.4-5.5 kWh/m 2 /day.…”

Water Allocation Based on Real-Time Simulation for Improving Soil Water Content

“…The minimum value of RMSE is zero, with a better agreement close to 0. Nash-Sutcliffe efficiency index (NSE) varied between 1 for best agreement to negative values (Miao et al 2019;Nejad et al 2021;Wu et al 2021;Quan et al 2021;Liu et al 2021). Moreover, the coefficient of determination (R 2 ) was incorporated to evaluate the calibration and verification process in the scatter-plot of simulated and observed yield production.…”

Current Challenges and Advancements on the Management of Water Retreatment in Different Production Operations of Shale Reservoirs

“…Another production operation that required water to continue its processes is CEOR, as water would be an essential part of preparing chemical agents such as polymers, foams, and surfactants [72][73][74]. The reason for this concerns the aqueous solution that needs to be provided for CEOR methods, as polymers and surfactants are in the form of powders [75][76][77]. Therefore, to control the processes in underground formations, it is crucial to use chemical agents as aqueous solutions [77].…”