Article
Mechanics
Eui-Kyun Park, Jin-Ha Hwang, Yun-Jae Kim, Poh-Sang Lam
Summary: This technical note examines the impact of two options for determining model parameters on ductile tearing simulation, with the second option showing better accuracy in predicting crack initiation and growth compared to the first option.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Engineering, Civil
Nagesh, N. K. Gupta
Summary: This paper presents numerical models for assessing large deformations and ductile fracture failure modes of fully clamped circular plates and transversely stiffened circular plates under uniform impulsive loads. The models are based on detailed characterization of constitutive properties and calibration of material and failure parameters. A hybrid damage model with good correlation to experimental results is proposed, and its effectiveness is demonstrated in predicting the effect of transverse cross stiffened configurations on deformation and fracture behavior.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Mechanical
Nagesh, N. K. Gupta
Summary: The study focuses on Finite Element Analysis (FEA) and simulations of large deformations and ductile fracture failure modes of clamped circular plates under uniform impulsive loads. A new numerical setup is proposed based on well-defined constitutive material properties and a two part ductile fracture locus, showing good correlation with experimental results and offering insights into the effect of structural configurations on the plate's response and failure mechanisms.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Automation & Control Systems
Salah Laboubi, Ouzine Boussaid, Mohamed Zaaf, Walid Ghennai
Summary: During the metal forming process, predicting and preventing ductile fracture is crucial for obtaining defect-free products. This study focuses on the elastoplastic damage behavior of DC04 steel and develops a fully coupled elastoplastic damage model to simulate fracture during deep drawing. The model is validated through numerical simulations and comparison with experimental results, showing good correlation and agreement with observations. This model enables the prediction of damage initiation and evolution leading to ductile fracture.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Mechanical
C. A. Bronkhorst, H. Cho, P. W. Marcy, S. A. Vander Wiel, S. Gupta, D. Versino, V. Anghel, G. T. Gray
Summary: Accurately representing porosity-based ductile damage in polycrystalline metallic materials remains a significant challenge, but a soft-coupled linkage technique between a macro-scale damage model and micro-mechanical calculations has shown promise in this study. The micro mechanical model captures non-Schmid effects and suggests significant influences on local stress conditions across grain boundaries and triple junctions within the polycrystalline network.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Engineering, Mechanical
Rijin He, Xiaoying Sun, Yue Wu, Jiyang Fu
Summary: This paper investigates the macroscopic damage model of architectural fabrics and the numerical simulation method for its tearing failure. The proposed model considering nonlinear elastic damage behavior is validated and shown to have advantages in terms of implementation and accuracy. The nonlinear variation mechanism of tearing residual strength is revealed.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Physics, Fluids & Plasmas
S. S. Lu, Z. W. Ma, W. Tang, W. Zhang, Y. Liu
Summary: The study on the nonlinear dynamics of the m/n = 2/1 double tearing mode (DTM) in ITER shows that explosive bursts occur only with moderate separation or strong magnetic shear strength between the two rational surfaces. In cases of large separation and weak shear strength between the two rational surfaces, the magnetic islands saturate without strong interaction with each other.
Article
Mathematics, Applied
Alexey Shutov, Vladislav S. Klyuchantsev
Summary: This paper discusses the application of non-local material models for simulating non-local damage accumulation and fracture. Various non-local cases with common spatial symmetries are analyzed analytically and numerically, and a new easy-to-use averaging kernel is suggested. Finite element method solutions are presented using a ductile damage model based on the multiplicative decomposition of the deformation gradient.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2023)
Article
Chemistry, Physical
Miroslav Urbanek, Josef Hodek, Daniel Melzer, Martina Koukolikova, Antonin Prantl, Jaroslav Vavrik, Michal Brazda, Petr Martinek, Sylwia Rzepa, Jan Dzugan
Summary: Additive manufacturing (AM) is increasingly becoming a standard process in various industries. However, there is still limited knowledge about the relationship between measured material data and the overall behavior of directed energy deposition (DED) processed complex structures. Understanding the structural performance of additively manufactured parts by DED, including flow curves and local damage properties, is crucial. This study focuses on predicting the behavior of thin-walled structures manufactured by the DED process under static loading using finite element analysis (FEA), and compares the mechanical performance of partly and fully machined miniaturized samples produced from the structure.
Article
Mathematics, Interdisciplinary Applications
Michael Bruenig, Sanjeev Koirala, Steffen Gerke
Summary: The paper focuses on numerical analysis of the effect of stress and loading direction on damage and fracture behavior of anisotropic metals. The continuum damage model is enhanced to consider the influence of anisotropy and loading direction on damage criteria and damage strain evolution. Experimental results with uni- and biaxially loaded specimens are used to determine constitutive parameters. Micro-mechanical numerical analyses provide insight into damage processes and their influence on macroscopic damage laws. The anisotropic behavior and loading direction affect damage mechanisms and damage strains on the micro-level.
COMPUTATIONAL MECHANICS
(2023)
Article
Engineering, Manufacturing
Kartikey Joshi, Patcharapit Promoppatum, Siu Sin Quek, Srinivasan Raghavan, Nur Syafiqah Johan, Shashwat Shukla, Saritha Samudrala, Sjoerd van der Veen, Mark H. Jhon
Summary: The mechanical reliability of alloys produced by Laser-Powder Bed Fusion (LPBF) is crucial for practical applications. This study utilized an experimentally validated computational model to quantify the effects of porosity on mechanical properties.
ADDITIVE MANUFACTURING
(2023)
Article
Crystallography
Faisal Qayyum, Sergey Guk, Ulrich Prahl
Summary: The mechanical behavior of newly developed composite materials is studied using a physics-based crystal plasticity model with ductile and brittle damage criteria. The simulation model reveals the interdependence of microstructural deformation phenomena and the influence of zirconia particles on micro-mechanical deformation and damage in the metastable austenite matrix. The predicted trends and patterns of local strain and damage match the results of in-situ tensile tests on similar materials.
Article
Multidisciplinary Sciences
Mohamad Sadegh Zeinali, Hassan Moslemi Naeini, Hossein Talebi-Ghadikolaee, Valiollah Panahizadeh
Summary: This study discussed the fracture in a symmetrical channel-shaped product during the roll forming process using the Lou-Huh ductile fracture criterion. Numerical simulations and experimental tests were conducted to investigate the effects of different factors on fracture.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
Article
Mechanics
A. V. Shutov, V. S. Klyuchantsev
Summary: The present study focuses on the application of an integral-based approach for constructing non-local ductile damage models. The incorporation of non-locality into the damage accumulation rule enhances the modeling framework and yields simulation results that are physically reasonable. The study proposes novel delocalization kernels that consider the heterogeneity of stresses and strains in the fracture process zone, and explores normalization procedures for these kernels. The outcome of this study is a modeling tool suitable for end-to-end simulations of damage accumulation and fracture, with demonstrated applicability in finite element analysis.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Mechanics
M. Asadi, F. Haji Aboutalebi, M. Poursina
Summary: This study successfully calibrated the material using six curve fitting methods in the tandem cold rolling mill process, with a focus on predicting strip tearing phenomenon accurately and with fewer required tests. By validating the fracture loci and selecting the best curve fitting method, it was possible to trace strip tearing in the process through only two simple tensile tests.
ARCHIVE OF APPLIED MECHANICS
(2021)
Article
Engineering, Multidisciplinary
Abraham Mensah, Srinivas Sriramula
Summary: This paper proposes a pathway for developing efficient performance functions to evaluate the probability of failure for interacting pipeline corrosion clustering defects using a probabilistic finite element-based reliability method. The framework reduces computational cost and offers informed decision-making on risk and maintenance management.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2024)
Article
Engineering, Multidisciplinary
Baozhu Zhang, Wenchun Jiang, Yun Luo, Wei Peng, Yingjie Qiao
Summary: This paper studies the distribution of residual stress in thick wall girth welds using narrow-gap welding. The study finds that the heat input, wall thickness, radius thickness ratio, and number of welding passes have an effect on residual stress. A model for the distribution of welding residual stress through the wall thickness is proposed, and its results are in good agreement with finite element calculation results.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2024)
Article
Engineering, Multidisciplinary
Stefan Culafic, Darko Bajic, Tasko Maneski
Summary: This paper presents experimental research on a branch model conducted in laboratory conditions. The study verifies the linear relationship between stress and internal pressure in the field of elasticity and reveals the occurrences when stresses exceed the yield strength of the branch material, such as plastic deformations of the branch model. The research also defines the dependence of stress on internal pressure in both the field of elasticity and the zone of residual stresses.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2024)
Article
Engineering, Multidisciplinary
Wenchun Jiang, Wenlu Xie, Xinyue Qi, Yangguang Deng, Yu Wan, Xuefang Xie
Summary: Various types of solid-state phase transformations (SSPT) occur during the SA508 steel welding process, leading to complex microstructure distribution and significant influence on residual stress distribution. To better control microstructure and residual stress, optimization of process parameters related to welding thermal cycles is necessary.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2024)
