Article
Mechanics
Ali Dogan, M. Fatih Sahan
Summary: This study investigated the viscoelastic damped dynamic behaviors of laminated composite shells under different dynamic loads. The truncated series method was used to form the equations governing the system, and the z/R terms were included in the truncation. The governing equation of composite shells was obtained using Hamilton's principle, and time dependent partial differential equations were solved using the Navier solution method in Laplace space. The importance of including the curvature effect of the shells and the effectiveness of the proposed approach were highlighted. The results were compared with other methods and proved to be highly effective.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Engineering, Mechanical
Wei Huang, Sihua Deng, Wu Zhou, Jiayi Liu, Zhongcheng Mu, Wei Zhang
Summary: The dynamic response of metallic sandwich structures to water-based impulsive loadings was experimentally analyzed, with emphasis on the effects of core materials, impulsive intensity, and loading area on failure modes. The results showed that asymmetric failure modes and reverse deformation caused by counterintuitive behavior were significant for sandwich structures.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Mechanics
Zhangxian Yuan, George A. Kardomateas
Summary: This paper analyzes the dynamic stability of sandwich beams/wide plates under axial impulsive loads using the extended high-order sandwich panel theory. The study reveals that the dynamic response changes with the magnitude and duration of the impulse load, and can exceed the static response in certain cases. Additionally, the dynamic response can be controlled at a low level if the duration of the impulse load is short enough, allowing the load to exceed the static critical load safely.
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2021)
Article
Engineering, Multidisciplinary
Yuewu Wang, Haotian Liu, Wei Zhang, Yaze Liu
Summary: The transient responses of functionally graded graphene nanoplatelet reinforced porous cylindrical microshells subjected to time-dependent impulsive loads are investigated for the first time. The effects of internal pores, GNP distribution patterns, and external load parameters on the dynamic deflections of the microshells are examined.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Acoustics
Majid Khayat, Abdolhossein Baghlani, Seyed Mehdi Dehghan, Mohammad Amir Najafgholipour
Summary: This study investigates the influence of graphene platelet reinforcements and nonlinear elastic foundations on the geometrically nonlinear dynamic response of a functionally graded porous cylindrical shell partially filled with fluid under exponential loading. Various distributions of porosity and dispersions of graphene platelets are considered, and the effective material properties are determined using the Halpin-Tsai equations. The governing equations are derived based on high-order shear deformation theory and Sanders's theory, and an incremental-iterative approach is employed to solve the nonlinear equations of motion. The effects of parameters such as fluid depth, porosity distribution, and graphene platelet dispersion on the nonlinear dynamic behavior of the cylindrical shell are extensively studied through numerical analysis.
JOURNAL OF VIBRATION AND CONTROL
(2022)
Article
Engineering, Mechanical
Xibing Li, Helong Gu, Ming Tao, Kang Peng, Wenzhuo Cao, Qiyue Li
Summary: This study investigated the influence of pre-static load and dynamic load on the fracture evolution and destruction states of coal using experimental and theoretical approaches. The results showed that pre-static load can affect the post-peak dynamic stress-strain curve of the specimen, while dynamic load plays a role in the dynamic failure state of coal.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2021)
Article
Geochemistry & Geophysics
Xiang Li, Si Huang, Tubing Yin, Xibing Li, Kang Peng, Xiaodong Fan, Wengang Dang, Linchong Huang
Summary: The study investigated the effect of thermal shock on heated sandstone, with tests conducted under different cooling rates. It was found that the physical properties of heated sandstone change as the heating level increases. Higher cooling rates cause more damage to the sandstone, with different failure modes and mechanisms analyzed.
Article
Engineering, Marine
Jiguang Zhang, Zhixin Huang, Zihao Chen, Ying Li
Summary: This study experimentally investigates the dynamic response of spherical shells under impact loads. The analysis focuses on the effects of flyer velocity, shell thickness, and shell curvature radius on shell deformation. The spherical shells are subjected to different intensity underwater shock waves using a projectile-impact-based underwater shock tube. The method of three-dimensional digital image correlation with high-speed photography is used to capture the dynamic response of the spherical shell. The response mechanism of the spherical shells is analyzed through experimental and numerical simulations.
Review
Materials Science, Multidisciplinary
Emilio Turco
Summary: Materials based on pantographic unit cells have unique mechanical properties and are widely studied theoretically, experimentally, and numerically. Numerical simulations play a significant role in the design and optimization of these materials, providing insight for future challenges.
MATHEMATICS AND MECHANICS OF SOLIDS
(2021)
Article
Engineering, Mechanical
Cheng Xu, Wensu Chen, Hong Hao, Kaiming Bi, Thong M. Pham
Summary: Metaconcrete with engineered resonant aggregates shows promise in mitigating stress waves induced by impulsive loading, with experimental and numerical studies revealing the importance of volume fraction and bandgap settings on its effectiveness in wave propagation mitigation.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Engineering, Civil
L. M. Ferreira, C. A. C. P. Coelho, P. N. B. Reis
Summary: This paper investigates the impact dynamics of thin semicylindrical woven composite laminate shells, focusing on the influence of thickness. The study utilizes the finite element method to evaluate intralaminar and interlaminar damage and successfully predicts the load histories and maximum impact force, displacement, contact time, and impact bending stiffness.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Geological
Xing Kai Wang, Zhi Yong Ai
Summary: This study investigates the dynamic response of fractional poroviscoelastic layered media subjected to a moving harmonic load. The governing equations of poroelastic media are derived based on Biot's theory and transformed into ordinary differential equations by using the double Fourier integral transform. By incorporating fractional calculus theory and the dynamic correspondence principle, the applicability of these equations is extended to fractional poroviscoelastic media. The extended precise integration method (PIM) is employed to obtain solutions. Subsequently, the fractional Zener model and the presented method are validated. Finally, parametric studies are conducted to analyze the effects of fractional order, moving velocity, load frequency, and stratification on the dynamic behaviors of the media.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Geological
Sheng Li, Zhugang You, I-Hsuan Ho, Li Ma, Yunyan Yu, Changdan Wang
Summary: The Loess Plateau in Northwest China is a seismic area where high-filled cut-and-cover tunnels (HFCCTs) are at high earthquake risk. Laying an expanded polystyrene (EPS) board on top of the Cut-and-Cover Tunnels (CCTs) can effectively reduce earth pressure and lower the risk of potential failure. However, the seismic load may disturb the backfill soil due to frequent earthquakes in the area. Finite difference program FLAC3D was used to analyze the earth pressure distribution and soil arching effect under seismic load. The results showed that the seismic load significantly affected the earth pressure and soil arch evolution.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2022)
Article
Engineering, Aerospace
Yunfei Liu, Wenyang Hu, Runze Zhu, Babak Safaei, Zhaoye Qin, Fulei Chu
Summary: In this study, a novel computational method for nonlinear impact force in the local contact area is proposed, and the dynamic response of corrugated structures is analyzed. By establishing an equivalent shell model and using numerical solution techniques, the impact response of corrugated shells under low-velocity impact is effectively studied.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Zhangxian Yuan, George A. Kardomateas
Summary: This paper analyzes the dynamic stability of sandwich beams/wide plates subjected to periodic axial loads using the Extended High-order Sandwich Panel Theory (EHSAPT). The equations of motion are derived and expressed in terms of seven generalized displacements. The dynamic stability analysis is carried out by considering the features of the periodic load profiles using Floquet theory and Bolotin's method. Stability maps for varying frequency and amplitude of the forces are presented, showing that dynamic instability can occur even when the dynamic loads are much lower than the static critical loads.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2023)
Article
Engineering, Mechanical
Jeong-Hoon Song, Yao Fu, Tae-Yeon Kim, Yeong-Cheol Yoon, John G. Michopoulos, Timon Rabczuk
INTERNATIONAL JOURNAL OF MECHANICS AND MATERIALS IN DESIGN
(2018)
Article
Mathematics, Applied
Khac Chi Hoang, Tae-Yeon Kim, Jeong-Hoon Song
FINITE ELEMENTS IN ANALYSIS AND DESIGN
(2018)
Article
Engineering, Multidisciplinary
Young-Cheol Yoon, Peter Schaefferkoetter, Timon Rabczuk, Jeong-Hoon Song
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2019)
Correction
Mathematics, Applied
Iman Asareh, Tae-Yeon Kim, Jeong-Hoon Song, John E. Dolbow
FINITE ELEMENTS IN ANALYSIS AND DESIGN
(2019)
Article
Engineering, Multidisciplinary
Andrew Beel, Tae-Yeon Kim, Wen Jiang, Jeong-Hoon Song
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2019)
Article
Engineering, Multidisciplinary
Tae-Yeon Kim, Wen Jiang, Sungmun Lee, Jeong-Hoon Song, Chan Yeob Yeun, Eun-Jae Park
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2020)
Article
Engineering, Mechanical
Man Asareh, Jeong-Hoon Song
JOURNAL OF ENGINEERING MECHANICS
(2019)
Article
Engineering, Mechanical
Ashkan Almasi, Andrew Beel, Tae-Yeon Kim, John G. Michopoulos, Jeong-Hoon Song
JOURNAL OF ENGINEERING MECHANICS
(2019)
Article
Engineering, Multidisciplinary
Ashkan Almas, Tae-Yeon Kim, Tod A. Laursen, Jeong-Hoon Song
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2019)
Article
Engineering, Multidisciplinary
Iman Asareh, Jeong-Hoon Song, Robert L. Mullen, Yu Qian
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2020)
Article
Engineering, Multidisciplinary
Young-Cheol Yoon, Jeong-Hoon Song
Summary: The Interface Immersed Particle Difference Method (IIPDM) effectively addresses weak discontinuity in elliptic problems, eliminating the need for additional interface equations and improving computational efficiency. It accurately captures discontinuities and singularities within the solution field.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Computer Science, Interdisciplinary Applications
Peter Schaefferkoetter, John G. Michopoulos, Jeong-Hoon Song
Summary: This work introduces a powerful meshfree collocation method for a multi-phase field model that includes finite dissipation effects in rapid solidification. The simulation and study of solidification in an Al-Sn binary alloy system with low concentration is performed using the collocation method under periodic boundary conditions. The numerical implementation involves spatial discretization of the governing equations and time integration using the Crank-Nicolson method. The analysis includes a benchmark case with symmetry in domain size, grain positioning, and boundary conditions to study the behavior of the field equations and key terms embedded within, followed by the extension of the solidification analysis to multiple grains.
ENGINEERING WITH COMPUTERS
(2023)
Article
Computer Science, Interdisciplinary Applications
Andrew Beel, Jeong-Hoon Song
Summary: This study presents a meshfree point collocation method for thermomechanical contact between deformable bodies. The proposed method uses Taylor approximation and moving least squares to discretize and solve the governing nonlinear system of partial differential equations. Numerical examples are provided to verify the computational framework, demonstrating the method's ability to simulate mechanical and thermal contact.
ENGINEERING WITH COMPUTERS
(2023)
Article
Computer Science, Interdisciplinary Applications
Ashkan Almasi, Tae-Yeon Kim, Jeong-Hoon Song
Summary: This paper presents a strong form meshfree collocation method for two-dimensional single-body frictional contact problems. The numerical differential operators at discrete points within the domain are constructed using a point-wise Taylor series approximation and a generalized moving least squares approach. The resulting operators are then used to spatially discretize and solve the governing partial differential equations. The contact constraint conditions are formulated using the penalty approach, and benchmark problems are provided to demonstrate the efficiency of the method.
ENGINEERING WITH COMPUTERS
(2023)
Article
Mechanics
Ashkan Almasi, Young-Cheol Yoon, Tae-Yeon Kim, Tod A. Laursen, Jeong-Hoon Song
Summary: This paper presents a strong-form meshfree collocation method for frictional contact of two deformable bodies within the context of frictional crack problems. By completely avoiding the construction of meshes or grids, the method achieves robustness and consistency.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2023)
