The ability to predict multiaxial fatigue life of Al-Alloy 7075-T6 under complex loading conditions is critical to assessing its durability under complex loading conditions,particularly in aerospace,automotive,and str...The ability to predict multiaxial fatigue life of Al-Alloy 7075-T6 under complex loading conditions is critical to assessing its durability under complex loading conditions,particularly in aerospace,automotive,and structural applications.This paper presents a physical-informed neural network(PINN)model to predict the fatigue life of Al-Alloy 7075-T6 over a variety of multiaxial stresses.The model integrates the principles of the Geometric Multiaxial Fatigue Life(GMFL)approach,which is a novel fatigue life prediction approach to estimating fatigue life by combining multiple fatigue criteria.The proposed model aims to estimate fatigue damage accumulation by the GMFL method.The proposed GMFL-PINN combines this physics-based approach with data-driven neural networks.Experimental validation demonstrates that GMFL-PINN outperforms FS,Smith–Watson–Topper(SWT)and Li–Zhang(LZH)fatigue life prediction methods which provides a reliable and scalable solution for structural health assessment and fatigue analysis.展开更多
Results of experimental study of nanosecond diffuse discharge in SF_(6)and gas mixtures of SF_(6)with H_(2),D_(2)and C_(2)H_(6)are presented.The aim of this work is to study parameters of discharge between two extende...Results of experimental study of nanosecond diffuse discharge in SF_(6)and gas mixtures of SF_(6)with H_(2),D_(2)and C_(2)H_(6)are presented.The aim of this work is to study parameters of discharge between two extended electrodes with a small radius of curvature in SF_(6)and SF_(6)with additives.It was shown that diffuse discharge can be formed in SF_(6)at elevated pressure between blade electrodes with length of 30 cm.It was also confirmed that in a sharply non-uniform electric field a beam of runaway electrons is generated and that the gap breakdown occurs due to ionisation waves which begin on electrodes with small radius of curvature.Laser action in the infrared spectral region was obtained in SF_(6)-H_(2)(D_(2),C_(2)H_(6))mixtures.The laser output up to 110 mJ was easily achieved which corresponds to ultimate intrinsic efficiency(with respect to deposited energy)of 10%.展开更多
文摘The ability to predict multiaxial fatigue life of Al-Alloy 7075-T6 under complex loading conditions is critical to assessing its durability under complex loading conditions,particularly in aerospace,automotive,and structural applications.This paper presents a physical-informed neural network(PINN)model to predict the fatigue life of Al-Alloy 7075-T6 over a variety of multiaxial stresses.The model integrates the principles of the Geometric Multiaxial Fatigue Life(GMFL)approach,which is a novel fatigue life prediction approach to estimating fatigue life by combining multiple fatigue criteria.The proposed model aims to estimate fatigue damage accumulation by the GMFL method.The proposed GMFL-PINN combines this physics-based approach with data-driven neural networks.Experimental validation demonstrates that GMFL-PINN outperforms FS,Smith–Watson–Topper(SWT)and Li–Zhang(LZH)fatigue life prediction methods which provides a reliable and scalable solution for structural health assessment and fatigue analysis.
文摘Results of experimental study of nanosecond diffuse discharge in SF_(6)and gas mixtures of SF_(6)with H_(2),D_(2)and C_(2)H_(6)are presented.The aim of this work is to study parameters of discharge between two extended electrodes with a small radius of curvature in SF_(6)and SF_(6)with additives.It was shown that diffuse discharge can be formed in SF_(6)at elevated pressure between blade electrodes with length of 30 cm.It was also confirmed that in a sharply non-uniform electric field a beam of runaway electrons is generated and that the gap breakdown occurs due to ionisation waves which begin on electrodes with small radius of curvature.Laser action in the infrared spectral region was obtained in SF_(6)-H_(2)(D_(2),C_(2)H_(6))mixtures.The laser output up to 110 mJ was easily achieved which corresponds to ultimate intrinsic efficiency(with respect to deposited energy)of 10%.
