Article
Engineering, Mechanical
A. M. Mirzaei, P. Cornetti, A. Sapora
Summary: A novel model is proposed for assessing the fatigue lifetime of notched components in the medium/high-cycle fatigue regime. The model is based on Finite Fracture Mechanics and employs Basquin's equations to capture the input parameter variation. The criterion is validated against various experimental data sets from the literature.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Chemistry, Physical
Xiaochun Zhu, Zhurong Dong, Yachen Zhang, Zhengkun Cheng
Summary: This study investigates the fatigue failure mechanisms of high-strength steel 42CrMo by conducting bending fatigue tests on stepped shafts with varying surface roughness. The study establishes the mechanical properties of 42CrMo and its strain-life relationship, while introducing analytical formulas to describe stress concentration and notch factors induced by surface topography. The proposed procedure effectively estimates the impact of surface roughness on fatigue life by revising the total strain-life curve with the proposed analytical factors.
Article
Automation & Control Systems
Soran Hassanifard, Kamran Behdinan
Summary: This study experimentally and numerically investigated the fatigue life of notched polylactic acid (PLA) samples fabricated using the fused deposition modeling (FDM) technique. The results showed that the raster orientation parameter had a significant impact on the fatigue strength reduction factors and fatigue lives. Samples with 90 degrees raster angles exhibited similar fatigue lives for notched and un-notched 3D-printed samples, while un-notched samples with 0 degrees raster orientations had higher fatigue lives compared to notched samples.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Abhijit Sadhu, Sagar Sarkar, Angshuman Chattopadhyay, Omkar Mypati, Surjya K. Pal, Ashish Kumar Nath
Summary: The study showed that LSP treatment can enhance yield strength and fatigue life of base and FSW specimens, but has less obvious effect on surface residual stress. Additionally, the increase in low angle grain boundaries after LSP indicates an increase in substructure induced by plastic deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
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
Chemistry, Multidisciplinary
Ralf Burghardt, Lukas Masendorf, Michael Waechter, Alfons Esderts
Summary: This paper discusses efficient implementation of notch root approximation methods for software systems and provides application recommendations. By considering aspects such as the formulation of the root finding problem, determination of required derivatives, and termination criteria, computational performance can be increased by approximately 2-3 times without compromising the accuracy of service life estimation.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Mechanical
Yan-Lai Wu, Shun-Peng Zhu, Jin-Chao He, Ding Liao, Qingyuan Wang
Summary: This study revisited the significant effects of notches on the fatigue performance of engineering components, and developed an improved weight function for a modified SFI approach considering size effect. Experimental results showed that the modified SFI approach provides better predictions for fatigue performance.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Mechanical
Longbang Qing, Yile Wang, Mingqi Li, Ru Mu
Summary: Aligned and random steel fiber reinforced cementitious composites (ASFRC, SFRC) were prepared to investigate the influence of fiber orientation and volume fraction on the fatigue life and fracture behavior of composites. The experimental results showed that the fatigue life of ASFRC was more than 8 times longer than that of SFRC. Compared to SFRC, ASFRC exhibited an increase of over 17% in the critical effective crack length, allowing for greater deformation and crack propagation. Furthermore, a two-parameters fracture model considering the fiber volume fraction (Vf) was developed based on the experimental results to predict the fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Xue-Kang Li, Sijia Chen, Shun-Peng Zhu, Ding Liao, Jie-Wei Gao
Summary: Geometrical discontinuities in engineering components lead to stress concentrations, initiating cracks under cyclic loadings and determining the fatigue strength of the whole part. A novel strain energy density-based model and P-W-Nf curve are developed to consider fatigue life scatter from material dispersity, improving the accuracy of fatigue life prediction.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Engineering, Mechanical
Chenwei Shao, Xinqiang Zhang, Shuo Zhao, Yankun Zhu, Huajie Yang, Yanzhong Tian, Zhenjun Zhang, Peng Zhang, Xianghai An, Zhefeng Zhang
Summary: This study proposes a crack growth model for LCF to enhance the LCF performance of engineering structural materials. By introducing strength gradient architecture and investigating the influences of strength/microstructure, it is found that TWIP steel with negative strength gradient exhibits excellent LCF properties.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Engineering, Mechanical
Xingke Gao, Bochuan Li, Chao Jiang
Summary: The fatigue limits of micro-notched specimens with nanocrystallized surface fabricated by USRP are significantly higher than that of coarse grain specimens due to surface hardening and compressive residual stress. Moreover, it is verified that the predicted value from Murakami's model agrees well with the experimental value when the surface Vickers hardness is selected.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Mechanical
Nima Razavi, Andrea Avanzini, Giovanna Cornacchia, Luca Giorleo, Filippo Berto
Summary: This study investigated the fatigue properties of Cobalt-Chromium-Molybdenum specimens produced by Selective Laser Melting for biomedical applications, revealing that vacuum heat treatment and Hot Isostatic Pressing can enhance fatigue properties. The study also evaluated notch sensitivity and the applicability of ASED failure criterion for predicting fatigue life of notched specimens.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Mechanical
Anteneh Tilahun Taddesse, Shun-Peng Zhu, Ding Liao, Hong-Zhong Huang
Summary: Notch fatigue strength analysis is crucial for safe structural design and operational reliability of key components, especially in low cycle fatigue regime where the influence of CPZ is significant. A novel approach combining TCD theory with CPZ concepts provides better correlations with tested results, suggesting the critical distance increases with CPZ size during low cycle fatigue analysis instead of being a material constant.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Engineering, Mechanical
Nader Zirak, Abbas Tcharkhtchi
Summary: This study focuses on predicting the fatigue life of amorphous glassy polymers by alternating different parameters based on experimental results. The mechanism of fatigue failure was investigated using scanning electron microscopy, leading to the observation of different fracture regions consisting of thermal and mechanical zones under different temperature conditions. The proposed model is based on the cumulative evolution of micro-defects until rupture, with constant parameters varying depending on the material, temperature, and frequency. The results show that the model has a good ability to predict the fatigue life of polymers.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Metallurgy & Metallurgical Engineering
Abinab Niraula, Heikki Remes, Pauli Lehto
Summary: This research investigates the impact of local weld notch parameters on fatigue crack initiation sites in laser-hybrid butt welds using high-resolution 3D scans and fatigue tests. It explores the suitability of different geometric weld notch parameters for fatigue strength characterization and highlights the challenges in their measurements. The study finds that the fluctuation of weld notch shapes leads to significant variation in notch parameters, and undercut depth plays a crucial role in determining crack initiation.
WELDING IN THE WORLD
(2023)
Article
Materials Science, Multidisciplinary
Aniruddha Kumar, Manisha Prasad, Shailini Shail, R. B. Bhatt, P. G. Behere, Md Afzal, Arun Kumar, Rajib Kar, J. P. Nilaya, D. J. Biswas
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2015)
Article
Optics
Chetan Baghra, Aniruddha Kumar, D. B. Sathe, R. B. Bhatt, P. G. Behere, Mohd Afzal
OPTICS AND LASER TECHNOLOGY
(2015)
Article
Nuclear Science & Technology
Aniruddha Kumar, Tej Prakash, Manisha Prasad, Shailini Shail, R. B. Bhatt, P. G. Behere, D. J. Biswas
NUCLEAR ENGINEERING AND DESIGN
(2017)
Article
Optics
Aniruddha Kumar, D. J. Biswas
OPTICS AND LASER TECHNOLOGY
(2018)
Article
Optics
Aniruddha Kumar, Manisha Prasad, R. B. Bhatt, P. G. Behere, D. J. Biswas
OPTICS AND LASER TECHNOLOGY
(2018)
Article
Chemistry, Physical
Aniruddha Kumar, J. P. Nilaya, D. J. Biswas, R. B. Bhatt, Mohd Afzal, J. P. Panakkal, H. S. Kamath
APPLIED SURFACE SCIENCE
(2011)
Article
Chemistry, Physical
Aniruddha Kumar, V. R. Sonar, D. K. Das, R. B. Bhatt, P. G. Behere, Mohd. Afzal, Arun Kumar, J. P. Nilaya, D. J. Biswas
APPLIED SURFACE SCIENCE
(2014)
Article
Nuclear Science & Technology
Aniruddha Kumar, R. B. Bhatt, Mohd Afzal, J. P. Panakkal, Dhruba J. Biswas, J. Padma Nilaya, A. K. Das
NUCLEAR TECHNOLOGY
(2013)
Article
Optics
Aniruddha Kumar, Manisha Prasad, R. B. Bhatt, P. G. Behere, Mohd Afzal, Arun Kumar, J. P. Nilaya, D. J. Biswas
OPTICS AND LASERS IN ENGINEERING
(2014)
Article
Physics, Multidisciplinary
Aniruddha Kumar, R. B. Bhatt, P. G. Behere, Mohd Afzal, Arun Kumar, J. P. Nilaya, D. J. Biswas
PRAMANA-JOURNAL OF PHYSICS
(2014)
Article
Acoustics
Aniruddha Kumar, R. B. Bhatt, P. G. Behere, Mohd. Afzal
Article
Materials Science, Multidisciplinary
Aniruddha Kumar, Suman Neogy, Nachiket Keskar, D. J. Biswas
Summary: In this study, the authors investigated the feasibility of laser-assisted welding between stainless steel and aluminum foils using a nanosecond fiber laser. The results indicated that the stainless steel remained in solid state while the aluminum underwent localized melting, resulting in minimal heat affected zone and distortion.
JOURNAL OF LASER APPLICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Aniruddha Kumar, Saradhi Gumma, Supratik Roychowdhury, Vivekanand Kain, R. B. Bhatt, J. P. Nilaya, D. J. Biswas
Summary: This study demonstrates the successful removal of heat tint generated during gas tungsten arc welding of stainless steel using nanosecond pulsed fiber laser. The laser cleaning method not only improves pitting corrosion resistance but also offers superior quality and ease of operation compared to conventional mechanical or chemical cleaning methods.
JOURNAL OF LASER APPLICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Aniruddha Kumar, Nilabja Kanti Sarkar, Suman Neogy
Summary: By comparing the microstructural and mechanical properties of AISI 430 ferritic stainless steel spot welds made with a repetitive nanosecond pulsed fiber laser and a CW fiber laser, it was found that welds made by the nanosecond pulsed laser were superior due to the presence of a narrow heat-affected zone, finer grains in the fusion zone, higher load-bearing capacity before fracture, and better ductility.
JOURNAL OF LASER APPLICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Aniruddha Kumar, R. B. Bhatt, D. J. Biswas
JOURNAL OF NUCLEAR MATERIALS
(2020)
Article
Optics
Yin Xiao, Lina Zhou, Wen Chen
Summary: This paper introduces a correspondence imaging approach for reconstructing high-quality objects through complex scattering media. By deriving a rectified theory and introducing temporal correction, the proposed method eliminates the effect of dynamic scaling factors. Experimental results demonstrate the advantages of the proposed method over conventional methods in complex scattering environments, and it can also be combined with other methods to further enhance the quality of reconstructed objects.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Zengxuan Jiang, Minghao Chao, Qingsong Liu, Bo Cheng, Guofeng Song, Jietao Liu
Summary: In this paper, a multi-focal metalens with high focusing efficiency controlled by circular polarization multiplexing is demonstrated. The metalens can generate four transversely distributed focal points under normal incidence of linearly polarized light, supporting both left-circularly polarized and right-circularly polarized conversion. Furthermore, an oblique incidence metalens is designed to achieve high total focusing efficiency for terahertz waves and provides potential new applications for polarization imaging and detection.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Yiran Wang, Yu Ji, Xuyang Zhou, Xiu Wen, Yutong Li, Zhengjun Liu, Shutian Liu
Summary: This work presents a new reconstruction framework for structured illumination microscopy (SIM), which only requires four raw images and avoids extensive iterative computation. By using checkerboard pattern illumination modulation instead of sinusoidal fringe illumination, the proposed method significantly reduces image acquisition time and achieves higher image reconstruction rate. Additionally, the reconstruction process is non-iterative and not limited by the field of view size.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Qian He, Li Pei, Jianshuai Wang, Jingjing Zheng, Tigang Ning, Jing Li
Summary: This paper proposes a 3D refractive index profile visualization method to demonstrate mode activation and evolution in fiber fusion splicing. The method is validated through experimental results and provides support for various fiber splicing operations and mode coupling modulation.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Qiwei Li, Qiyu Wang, Fang Lu, Yang Cao, Xu Zhao
Summary: LSHIP is a lenslet-array-based snapshot hyperspectral imaging polarimeter that combines spectral polarization modulation with integral field imaging spectrometry. It can simultaneously acquire three-dimensional spatial and spectral data-cubes for linear Stokes parameters in a single snapshot.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Huicong Li, Bing Lv, Meng Tian, Wenzhu Huang, Wentao Zhang
Summary: This study proposes a temperature compensation scheme for unbalanced interferometers using sensing fibers with different temperature coefficients, aiming to resolve the temperature disturbance and achieve high strain resolution. The experimental results confirm the effectiveness of the proposed scheme in high-resolution, long-term, low-frequency, and static strain sensing.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Hongxiang Chang, Rongtao Su, Yuqiu Zhang, Bowang Shu, Jinhu Long, Jinyong Leng, Pu Zhou
Summary: High-speed variable-focus optics provides new opportunities for fiber laser applications in various fields. This paper investigates a non-mechanical axial focus tuning method using coherent beam combining (CBC) technique and proposes a tilt modulation assisted method to extend the tuning range.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Yubo Ni, Shuai Fu, Chaoyang Su, Zhaozong Meng, Nan Gao, Zonghua Zhang
Summary: This paper proposes a surface adaptive fringe pattern generation method to accurately measure specular surfaces, eliminating the out-of-focus effect and improving measurement accuracy and reliability.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Zifan Wang, Tianfeng Zhou, Qian Yu, Zihao Zeng, Xibin Wang, Junjian Hu, Jiyong Zeng
Summary: Fast-axis collimation (FAC) lens arrays are crucial in laser systems, and their precision can be improved through the development of an optical collimation system and the use of thermal compensation to correct for non-uniform thermal expansion.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Jincheng Chen, Qiuyu Fang, Li Huang, Xin Ye, Luhong Jin, Heng Zhang, Yinqian Luo, Min Zhu, Luhao Zhang, Baohua Ji, Xiang Tian, Yingke Xu
Summary: This study developed a novel deep learning accelerated SRRF method that enables super-resolution reconstruction with only 5 low SNR images, and allows real-time visualization of microtubule dynamics and interactions with CCPs.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Pan Liu, Yongqiang Zhao, Ning Li, Kai Feng, Seong G. Kong, Chaolong Tang
Summary: This article presents a technique for inverse design of multilayer deep-etched gratings (MDEG) using a deep neural network with adaptive solution space. The proposed method trains a deep neural network to predict the probability distribution across the discretized space, enabling evaluation of an optimal solution. The results show improved efficiencies using only a reduced dataset and avoiding one-to-many mapping challenges.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Evelina Bibikova, Nazar Al-wassiti, Nataliya Kundikova
Summary: Light beams possess three types of angular momentum, namely spin angular momentum, extrinsic orbital angular momentum, and intrinsic orbital angular momentum. The interaction between these momenta leads to the spin-orbit interaction of light and topological effects. This study predicts a new topological effect resulting from the influence of extrinsic orbital angular momentum on spin angular momentum in converging asymmetrical light beams. It manifests as the transformation of linear polarized light into elliptically polarized light when an asymmetrical beam passes through the left or right half of the focal plane. The measured value of the topological circular amplitude anisotropy R was found to be R = +/- (0.60 +/- 0.08) x 10(-3). This new effect contributes to our understanding of light and has potential applications in developing sensors in optics.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Hamdy H. Wahba
Summary: This study combines multiple-beam Fizeau interference and single-shot digital holographic interferometry to study thick phase objects. By collecting optical phase at different focal planes, the angular spectrum method is used for the first time to retrieve optical phase maps through the focal depth. The proposed method proves to be effective in providing accurate numerical focusing and phase maps reconstruction.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Mohammed A. Isa, Richard Leach, David Branson, Samanta Piano
Summary: Due to the complexity of resolving object form and pose in images, new vision algorithms prioritize identification and perception over accurate coordinate measurement. However, the use of planar targets for coordinate measurement in vision systems has several drawbacks, including calibration difficulties and limited viewing angles. On the other hand, the use of sphere targets is infrequent in vision-based coordinate metrology due to the lack of efficient multi-view vision algorithms for accurate sphere measurements.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Ildar Rakhmatulin, Donald Risbridger, Richard M. Carter, M. J. Daniel Esser, Mustafa Suphi Erden
Summary: This paper reviews the application of machine learning in laser systems. While machine learning has been widely used in general control automation and adjustment tasks, its application in specific tasks requiring skilled workforces for high-precision equipment assembly and adjustment is still limited. The paper presents promising research directions for using machine learning in mirror positional adjustment, triangulation, and optimal laser parameter selection, based on the recommendations of PRISMA.
OPTICS AND LASERS IN ENGINEERING
(2024)
