Review
Materials Science, Multidisciplinary
Pietro Foti, Nima Razavi, Ali Fatemi, Filippo Berto
Summary: Additive manufacturing techniques offer the possibility of highly customized components with manipulated material composition and geometrical properties. However, the application of additively manufactured parts on an industrial scale is limited due to the high variability in mechanical properties and the challenge of assessing their structural integrity and fatigue life. This review provides insights into multiaxial fatigue in additively manufactured metallic components and presents life prediction methodologies for fatigue damage assessment under multiaxial fatigue loading.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Engineering, Mechanical
Ganfang Luo, Jialin Guo, Chi Zhang, Xiaoniu Yang
Summary: In this paper, the fatigue performance of cord/rubber laminates is investigated under multiaxial loadings provided by pulley/bending fatigue tests. Life predictions are performed based on the crack growth approach and the crack nucleation approach. The results show that using the prediction models based on interfacial fatigue performance improves the life prediction of cord/rubber laminates, and the most satisfying prediction in terms of crack initiation plane and fatigue life is obtained by using cracking energy density as the predictor.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Reza Molaei, Ali Fatemi, Nam Phan
Summary: The fatigue and cracking behavior of two commonly used AM metals (Ti-6Al-4V and 17-4 PH stainless steel) under different conditions were studied, and the experimental results were compared with different materials. Two methods were used for data correlation and life estimation, and satisfactory estimations were obtained.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Engineering, Aerospace
Jingmeng Weng, Tong Meng, Weidong Wen, Shaodong Weng
Summary: This study focuses on the fatigue lives of composite laminates under different tension-torsion biaxial fatigue loading paths. By establishing a macro-meso model, the fatigue life of composite laminates can be predicted with numerical results showing good agreements with experimental data.
CHINESE JOURNAL OF AERONAUTICS
(2021)
Article
Engineering, Mechanical
Xue-Peng Zhou, De-Guang Shang, Dao-Hang Li, Jin-Jie Wang, Yi-Ru Zhao, Wei Li
Summary: This paper presents a total life prediction method for short crack propagation under multiaxial fatigue loading considering additional damage from nonproportional loading. A new calculation method of equivalent stress range is proposed to account for the effect of shear stress on crack propagation under tensile or compressive stress, and it is further modified to consider the additional damage. The proposed method, combined with Paris formula and crack closure correction, is validated through life results for two materials, showing errors within a factor of 3.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Engineering, Mechanical
Zhiqiang Zhou, Xiaoshan Liu, Guoqiu He, Bin Ge, Peiwen Le, Jiaqi Pan, Ziao Huang, Jingquan Li, Qigui Wang
Summary: This study systematically analyzes the fatigue properties of A319 alloy by quantifying microstructure characteristics and proposes a new multiaxial fatigue life prediction model for Al-Si alloy.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2021)
Article
Engineering, Mechanical
Y. Murakami, M. Endo
Summary: A prediction method for S-N curves without fatigue tests is proposed in this study. The method is based on the small crack (m*) growth model and predicts S-N curves for various materials. The predicted curves are compared with experimental data, showing good agreement for conservative predictions.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Mechanical
A. L. Dias, C. Bemfica, F. C. Castro
Summary: The influence of a small defect on the multiaxial fatigue strength of 304L stainless steel was experimentally investigated. The results of fatigue tests showed that the failure mechanism under the experimental conditions studied is dominated by tensile stress.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Engineering, Mechanical
A. Ince, G. Glinka
Summary: Several studies have indicated that fatigue crack growth is influenced by elastic-plastic strains and stresses localized near the crack tip. The distribution of stress and strain ahead of the crack tip is crucial in crack growth analysis of structural components. While numerical analysis methods can be used to compute local stresses and strains, they are costly and labor-intensive in engineering applications. Therefore, a new modeling framework based on approximation has been developed to calculate elastic-plastic stresses and strains ahead of a stationary crack tip, which has been verified through numerical finite element analysis data.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Engineering, Mechanical
Iman Shakeri, Hilmar K. Danielsen, Adrien Tribhou, Soren Faester, Oleg Mishin, Martin A. Eder
Summary: This study investigates the impact of manufacturing defects induced by thread rolling on the high-cycle fatigue life of M30 class 10.9 stud bolts. The high-cycle fatigue tests of two batches of seemingly identical bolts reveal significant differences in fatigue performance. Scanning electron microscopy characterization shows a clear correlation between the defect size, in the form of rolling-induced microcracks in the thread root, and the fatigue life of the investigated bolts. Numerical fatigue analysis agrees well with experimental data. Electron backscatter diffraction is used to determine the characteristic length of microstructurally short defects in the tempered martensite microstructure. These results shed light on the critical manufacturing defect sizes in bolts, which is an essential parameter for quality control in the manufacturing process.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Mechanical
Gao Yuan He, Yong Xiang Zhao, Chu Liang Yan
Summary: The study focuses on the development of a hierarchical Bayesian linear regression method to estimate parameters in the multiaxial fatigue crack growth model. The results show that the parameters of the model significantly change with different loading paths.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Junbin Yang, Yu Gong, Linfei Jiang, Wanjia Lin, Hao Liu
Summary: This work proposes a multiaxial and high-cycle fatigue failure model based on the critical plane criterion, which accurately predicts the fatigue failure behavior and fatigue life of structures or materials under multi-axial loading by considering the influences of material property and loading path on the initiation and growth of fatigue cracks. Experimental results of three kinds of material validate the model's applicability, with most predictions falling within the +/- 2 times scatter band of fatigue life.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Mechanical
Niloofar Sanaei, Ali Fatemi
Summary: The study utilized a fracture mechanics framework based on defects and their characteristics to predict fatigue life under multiaxial stresses for various metals and processes, discussing the implications of initial defect characteristics and the effects of roughness-induced closure in mixed-mode crack growth.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2021)
Article
Chemistry, Physical
Tianqi Liu, Xinxin Qi, Xinhong Shi, Limin Gao, Tian Zhang, Jianyu Zhang
Summary: Multiaxial asynchronous fatigue experiments on 30CrMnSiA steel showed that frequency ratio affects fatigue crack initiation and propagation, with cracks propagating differently on stress planes and leading to different crack growth lengths for constant and asynchronous loading. Various fatigue life prediction models were compared, with the Bannantine-Socie cycle counting method, section critical plane criterion, and Palmgren-Miner's cumulative damage rule proving to be more applicable.
Article
Engineering, Mechanical
Yingyu Wang, Xiaofan Zhang, Zhenli Su, Weixing Yao
Summary: This study investigates a multiaxial fatigue life prediction method based on single defect for 316L stainless steel processed by laser powder bed fusion. It is found that defects are present in the crack initiation zone of more than 95% of the specimens. A method based on the small crack propagation theory is applied to predict fatigue life under uniaxial and pure torsional loading. The fatigue parameters obtained from this method are then used to predict multiaxial fatigue life using the Modified Wohler Curve Method, and the predicted results show good agreement with experimental data.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Materials Science, Multidisciplinary
Ahmad Nourian-Avval, Ebrahim Asadi
COMPUTATIONAL MATERIALS SCIENCE
(2018)
Article
Metallurgy & Metallurgical Engineering
Shahram Kheirandish, Ahmad Noorian
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2008)
Article
Materials Science, Multidisciplinary
M. Kazemi, A. R. Kiani-Rashid, A. Nourian, A. Babakhani
MATERIALS & DESIGN
(2014)
Article
Nanoscience & Nanotechnology
M. Kazemi, A. R. Kiani-Rashid, A. Nourian
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2013)
Article
Chemistry, Physical
Ahmad Nourian-Avval, Ali Fatemi
Article
Engineering, Mechanical
Ahmad Nourian-Avval, Ali Fatemi
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2020)
Article
Engineering, Mechanical
Ahmad Nourian-Avval, Ali Fatemi
Summary: The study evaluated the fatigue performance of high pressure die cast A356-T6 aluminum alloy under a real industrial load spectrum, investigated the mean stress effect, and estimated the fatigue life using different approaches.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Ahmad Nourian-Avval, Ali Fatemi
MATERIALS TODAY COMMUNICATIONS
(2020)
Article
Engineering, Mechanical
A. Nourian-Avval, M. M. Khonsari
Summary: This paper proposes a model for predicting fatigue life under multiaxial loading based on dissipated heat during fatigue tests, evaluating fatigue damage by considering different rates of dissipated energy under various multiaxial loadings. The predictive capability of the models is confirmed through comparison with experimental fatigue results.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Mechanical
A. Nourian-Avval, M. M. Khonsari
Summary: This paper focuses on the rapid prediction of medium- and high-cycle fatigue performance of materials using the thermography approach. A model is proposed to estimate the damaging and non-damaging parts of heat dissipation during cyclic loading, and the concept of fracture fatigue entropy is utilized to quickly generate stress-life diagrams. It is mathematically shown that dissipating energy is directly proportional to steady-state temperature, enabling the prediction of fatigue performance by measuring steady-state temperatures during stepwise testing.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Mechanics
Scott E. Julien, Ahmad Nourian-Avval, Wentao Liang, Tricia Schwartz, Ozan C. Ozdemir, Sinan Muftu
Summary: This study investigated the tensile and fracture anisotropy in helium-sprayed bulk Al 6061 cold spray deposits. The results showed no in-plane anisotropy in tensile properties, while the fracture toughness exhibited mild transverse isotropy. The low level of anisotropy was attributed to effective spray parameters and the usage of helium gas, ensuring good interparticle bonding.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
Ahmad Nourian-Avval, Ebrahim Asadi
COMPUTATIONAL MATERIALS SCIENCE
(2017)
Article
Engineering, Mechanical
Zhuang Sun, Yixin Zhao, Yirui Gao, Sen Gao, Davide Elmo, Xindong Wei
Summary: In this study, the modified semi-circular bending test was used to investigate the fracture toughness of coal samples with different sizes and bedding angles. The results showed that the fracture toughness of coal exhibits size effect and anisotropy. The crack initiation and propagation in hydraulic fracturing of coal seam can be influenced by bedding angles.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2024)
Article
Engineering, Mechanical
Ruiming Zhang, Kai Ma, Wenzhu Peng, Jinyang Zheng
Summary: The fatigue crack growth rates of 4130X steel in different hydrogen concentrations were measured, and the influence of hydrogen on crack behavior was analyzed. Results show that the crack growth rate increases with increasing hydrogen pressure, reaching a threshold at 87.5 MPa.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2024)
Article
Engineering, Mechanical
Hien Do, Phuc L. H. Ho, Canh V. Le, H. Nguyen-Xuan
Summary: In this study, a new method for determining the limit loads of fracture structures using the pseudo-lower bound method with adaptive quadtree meshes is proposed. The method overcomes the volumetric locking problem and handles the challenge of hanging nodes during refinement procedure by using quadtree meshes. The effectiveness of the approach is demonstrated through numerical validation.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2024)
Article
Engineering, Mechanical
Weimin Song, Yuxin Fan, Hao Wu, Liang Zhou
Summary: This study proposed a novel test method to characterize the I-II mixed fracture toughness of asphalt pavement and investigated the effects of reclaimed asphalt pavement (RAP) and loading rate. The results showed that loading rate and inclusion of RAP had positive effects on fracture toughness.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2024)
Article
Engineering, Mechanical
Zida Liu, Diyuan Li, Jianqiang Xia, Quanqi Zhu
Summary: In this study, the influence of flaw inclinations on the failure mechanism of fissured granite specimens was analyzed through a series of experiments. A quantitative method combining deep learning and scanning electron microscope was employed to identify the mesoscopic fracture mechanism of macroscopic cracks. The results indicated that the failure of fissured specimens was mainly caused by tensile stress and shear stress.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2024)
Article
Engineering, Mechanical
Jiabing Zhang, Yiling Chen, Ronghuan Du, Xianglian Zhao, Jun Wu
Summary: This study investigated the mechanical characteristics and crack propagation behavior of sandstone-like samples with single cracks under freeze-thaw cycles. The results demonstrated the significant effects of crack angle and freeze-thaw cycles on the compressive strength and stability of the samples. Confining pressure inhibited the freeze-thaw deterioration, and the acoustic emission signals exhibited good consistency with the stress-strain curves. The simulation results matched well with the experimental results, and five crack propagation modes were proposed.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2024)
Article
Engineering, Mechanical
Felix Boedeker, Pauline Herr, Anders Biel, Ramin Moshfegh, Stephan Marzi
Summary: Cohesive Zone Models with finite thickness are widely used for fracture mechanical modeling. Computational homogenization techniques are crucial for the development of advanced engineering materials. FFT-based homogenization scheme shows potential in reducing computational effort and has practical applications.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2024)
Article
Engineering, Mechanical
Sobhan Pattajoshi, Sonalisa Ray, Yugal Kishor Joshi
Summary: In this work, a novel multi-layer composite structure is proposed for protective shelter design. The dynamic behavior and mechanical performance of the multi-layer composite under projectile impact loading are investigated. The proposed composite target demonstrates enhanced penetration resistance and lesser damage compared to its reinforced concrete monolayer counterpart. An analytical model is also developed to predict the forces transmitted to the lowest layer for design purposes.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2024)
Article
Engineering, Mechanical
H. M. Shodja, M. T. Kamali, B. Shokrolahi-Zadeh
Summary: This study proposes a semi-analytical method for calculating the stress intensity factor of an internally pressurized eccentric annular crack. By using hypersingular integral equations and conformal mapping, accurate values of SIFs along the crack edges can be obtained. The material properties of the elastic matrix do not affect the SIF values, as demonstrated through the investigation of geometric parameters.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2024)
Article
Engineering, Mechanical
Wen Hua, Zhanyuan Zhu, Wenyu Zhang, Jianxiong Li, Jiuzhou Huang, Shiming Dong
Summary: Accurate assessment and prediction of fracture behavior in cracked materials using mixed mode fracture criteria are crucial in fracture mechanics. This study comprehensively reviewed modified fracture criteria that incorporate T-stress for mixed mode I-II cracks. A comparative analysis was conducted between experimental results and theoretical predictions for five different cracked configurations. The study also discussed the effect of T-stress on crack initiation angle and fracture toughness, providing suggestions. The results showed variations in predictive accuracy across different cracked configurations due to disparities in T-stress. However, similar predictions were observed for semi-circular bend and edge-crack triangular specimens due to their similar biaxial stress ratio B. Different fracture criteria were suitable for different cracked configurations with positive or negative T-stresses.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2024)
Article
Engineering, Mechanical
Qing-qing Shen, Qiu-hua Rao, Wei Yi, Dian-yi Huang
Summary: This study proposes a theoretical approach to forecast multi-crack propagation trajectories in a finite plate. By calculating the stress intensity factor (SIF) and analyzing the influence of crack size, the criteria for crack initiation and propagation in a finite plate are established. Experimental results demonstrate that the SIF of multiple cracks in a finite plate is consistently larger than that of an infinite plate.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2024)
Article
Engineering, Mechanical
Songbai Li, Qiyun Zhu, Zhizhong Lu, Hongzhi Yan, Chu Zhu, Peize Li
Summary: This study investigates the effects of laser heating and laser shot peening on fatigue life of AA2524, and predicts the fatigue life using artificial neural networks and support vector regression models. The results show that laser heating and laser shot peening can significantly improve the fatigue life, and the neural networks have better prediction ability.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2024)
Article
Engineering, Mechanical
V. Shlyannikov, A. Sulamanidze, D. Kosov
Summary: This paper presents experimental crack-growth data for thermomechanical fatigue conditions in nickel-based alloy components. The crack-growth experimental results are interpreted using finite element analyses and multi-physics numerical calculations. The results show that crack growth rate is slower under isothermal pure fatigue conditions, while it is faster under thermomechanical cyclic deformation conditions.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2024)
Article
Engineering, Mechanical
Tairui Zhang, Xin Ma, Bin Yang, Wenchun Jiang, Zhiqiang Ge, Xiaochao Liu
Summary: This study experimentally investigated the fracture toughness distributions in dissimilar metal welds. The predictions of fracture toughness were made using three criteria and an energy release rate model. The results showed that using the critical strain criterion and ERR model resulted in higher consistency compared to mini-CTs, while the predictions using the critical stress criterion had high dispersion. The study also investigated the source of errors through damage developments and SEM observations.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2024)
Article
Engineering, Mechanical
Yike Dang, Zheng Yang, Xiaoyu Liu, Jianghao Guo
Summary: This study uses discrete element modeling to examine bedded rock failure with parallel defects. It is found that bedding influences crack propagation direction but has limited impact on final failure. Shear failure accumulates at the bridge area and defect tip, while tensile failure occurs during nucleation region development.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2024)