Review
Engineering, Multidisciplinary
P. Fernandes, R. Pinto, N. Correia
Summary: Composite deployable structures are gaining importance in the space industry as an alternative to traditional metallic systems, allowing for increased efficiency and applicability. By ensuring reliability, materials can be used beyond their elastic range, leading to improved designs. The possibility of combining different design approaches for deployable structures is also being discussed.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Mechanics
Changcong Zhou, Chen Li, Hanlin Zhang, Haodong Zhao, Chunping Zhou
Summary: This work discusses an approach based on adaptive Kriging for reliability and sensitivity analysis of composite structures, estimating failure probability, local and global sensitivity. By analyzing composite beams, plates, and radomes, the accuracy and efficiency of the Kriging based approach were validated for evaluating the reliability of composite structures.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Industrial
Peng Hao, Hao Yang, Yutian Wang, Xuanxiu Liu, Bo Wang, Gang Li
Summary: An efficient bi-stage RBDO framework via isogeometric analysis (IGA) is established in this study for the design optimization of composite variable-stiffness panels, reducing the computational burden. The framework demonstrates efficient and accurate design performance in numerical experiments.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2021)
Article
Engineering, Aerospace
Xia Jiang, Zhenzhou Lu
Summary: This paper proposes a double-loop method, DL-AK-FS, for efficiently solving the design optimization problem with time-dependent failure possibility. The method combines the adaptive kriging model and fuzzy simulation, improving accuracy and efficiency when dealing with complex performance functions and multiple minimum performance target points.
Article
Engineering, Mechanical
Genshen Liu, Huaiju Liu, Caichao Zhu, Tianyu Mao, Gang Hu
Summary: The fatigue failure of gear transmission is a key factor that limits the performance and service life of wind turbines. The disregard of dynamic fatigue reliability in conventional design methods under random loading conditions leads to various issues, such as overweight structure or insufficient fatigue reliability. A novel gear transmission optimization model based on dynamic fatigue reliability sensitivity is developed to predict the optimal structural parameters, reducing volume by 3.58% while ensuring fatigue reliability.
FRONTIERS OF MECHANICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Junho Chun
Summary: This paper outlines a method for sensitivity analysis, reliability assessment, and RBDO for structures, using complex-step approximation and the first-order reliability method to streamline optimization problems setup and enhance implementation. The proposed method integrates complex-step approximation into the FORM to compute sensitivity and assess reliability, demonstrating performance benefits while satisfying precise probabilistic constraints.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Mechanical
Jiashu Yang, Jianbing Chen, Hector Jensen
Summary: This study investigates the feasibility of solving dynamic-reliability-based design optimization problems using the probability density evolution method (PDEM). The PDEM combined with extreme value distribution strategy is used for dynamic reliability assessment. Representative points that have a significant impact on dynamic reliability are identified, and sensitivity analysis is performed using these points. The proposed method efficiently solves the design optimization problem under dynamic reliability constraints by embedding the PDEM-based assessment into first-order optimization algorithms. Numerical examples demonstrate the effectiveness and efficiency of the method.
PROBABILISTIC ENGINEERING MECHANICS
(2022)
Article
Mechanics
Bing Zhang, Qihang Wang, Xuelei Liu, Lei Zu, Haiwei Yuan
Summary: A reduced order model was established to replace CFD solver in blade design, achieving high accuracy and acceptable computational efficiency through Principal Component Analysis and neural networks.
COMPOSITE STRUCTURES
(2022)
Article
Computer Science, Interdisciplinary Applications
T. Lam-Phat, V Ho-Huu, S. Nguyen-Ngoc, S. Nguyen-Hoai, T. Nguyen-Thoi
Summary: This article investigates lightweight design problems of Timoshenko composite beams and proposes iJaya and SLDM-iJaya for deterministic and reliability-based design issues. Numerical results suggest that iJaya performs well in handling optimization problems with both discrete and continuous variables, while SLDM-iJaya shows lower computational cost with similar optimal results in reliability-based design problems compared to other methods.
ENGINEERING WITH COMPUTERS
(2021)
Article
Computer Science, Interdisciplinary Applications
Zhou Yang, Unsong Pak, Yu Yan, Cholu Kwon
Summary: RBROD was conducted on a drum brake to reduce the influence of random parameters uncertainty on safety performance of vehicles, with a mathematical model established and results showing that the drum brake met reliability, robustness, and optimization design requirements. The adaptive Kriging method demonstrated the highest calculation accuracy and efficiency among the four meta-model methods used.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2022)
Review
Chemistry, Multidisciplinary
Marie Chiron, Jerome Morio, Sylvain Dubreuil
Summary: This article examines various techniques for assessing the sensitivity of failure probability to distribution or design parameters. Local failure probability sensitivity analysis is a fundamental step in reliability-based design optimization. By analyzing the influence of deterministic parameters on the failure probability, engineers and designers can make informed decisions about adjusting those parameters to enhance reliability.
APPLIED SCIENCES-BASEL
(2023)
Article
Computer Science, Interdisciplinary Applications
Hui Li, Hanshu Chen, Jian Zhang, Guohai Chen, Dixiong Yang
Summary: This paper proposes a novel direct probability integral method (DPIM) for reliability sensitivity analysis in the RBDO of time-variant systems with multiple most probable points. The DPIM allows for the resolution of time-invariant and time-variant RBDO problems in a unified framework, and significantly improves computational efficiency and accuracy. Three examples demonstrate the high accuracy and efficiency of the DPIM.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2023)
Article
Mathematics
Shiyuan E, Yanzhong Wang, Bin Xie, Fengxia Lu
Summary: This article proposes a reliability-based robust design method for rolling bearing fatigue failure. It derives the formula for fatigue accumulated damage under cyclic load spectrum and reduces the computational cost of rolling bearing time-varying reliability. Through finite element simulation and the adaptive kriging method, the correlation between random parameters and state response is characterized. The improved Miner fatigue cumulative damage theory and the derived time-varying equation of state are used to develop a fatigue time-varying reliability model and a reliability robust optimization design method, effectively improving the reliability and robustness of the product design.
Article
Engineering, Multidisciplinary
Primoz Jelusic, Rok Varga, Bojan Zlender
Summary: This paper presents recommendations for optimal pavement design through the development of eight optimization models and the optimization of different design data. The study shows that geosynthetically reinforced flexible pavements outperform conventional flexible pavements in certain project data.
AIN SHAMS ENGINEERING JOURNAL
(2023)
Article
Engineering, Mechanical
Xinyue Li, Yanan Yuan, Zuoqi Zhang
Summary: The use of ultra-thin plies in composite laminates brings advantages such as increased design flexibility, improved damage tolerance, and reduced delamination. However, the amplification of fiber damage in thin-ply laminates poses a challenge. To address this, a novel ply structure with a gradient thickness of thick/thin/thick plies was proposed, which showed superior impact damage resistance and enhanced damage tolerance compared to laminates with uniform ply thickness.
EXTREME MECHANICS LETTERS
(2023)
Article
Materials Science, Composites
Taresh Kala, Kumar Maharshi, Shivdayal Patel, Ravi Panwar
Summary: The study developed iron-reinforced jute fiber-based novel hybrid microwave absorbing composites to achieve better absorption and wide absorption bandwidth with acceptable tensile properties. The fabricated composite showed good potential for various strategic applications based on the achieved results.
ADVANCED COMPOSITE MATERIALS
(2021)
Article
Materials Science, Textiles
Kumar Maharshi, Shivdayal Patel
Summary: This study aimed to determine the mechanical properties and conduct uncertainty analysis of biodegradable Jute fabric composite. It involved fabricating samples, conducting mechanical tests, and analyzing results to understand the reliability and significance of such composites. The use of different distribution parameters for uncertainty analysis helped optimize product design and improve the reliability of composite materials.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Materials Science, Textiles
Sarang Joshi, Shivdayal Patel
Summary: Synthetic fiber composites are widely used in various industries due to their high strength-to-weight ratio, but environmental concerns arise from their production and non-degradable characteristics. Natural fibers like PALF, derived from pineapple leaves, are biodegradable and can be used as a sustainable alternative in composite materials, offering solutions to environmental issues and economic opportunities for farmers and industries. This review paper discusses surface treatment methods, mechanical and thermal properties, and the potential for future research in PALF reinforced composites.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Materials Science, Composites
Roopendra Kumar Pathak, Shivdayal Patel, Vijay Kumar Gupta
Summary: This study aims to develop a lightweight and efficient design of armor plates using 3D Kevlar/basalt hybridization and different stacking sequences of composite laminates for high-velocity impact. Through simulating different failure modes and panel types, it was found that the hybrid panel B3K3 showed excellent ballistic performance parameters.
ADVANCED COMPOSITE MATERIALS
(2023)
Article
Engineering, Mechanical
Mahendra Singh Raghav, Amandeep Singh, Shivdayal Patel
Summary: Spur gears are widely used for transmitting motion and torque. This study investigates the stresses at the root of gear teeth due to bending, using finite element method and Lewis theory. The analysis includes crack propagation paths under static and dynamic loadings for different initial crack lengths and backup ratios. The results show that as the initial crack length increases, the stress generated and the crack propagation paths vary.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Mechanical
Shivdayal Patel, Murlidhar Patel
Summary: A novel hybrid composite honeycomb sandwich structure and metallic honeycomb sandwich structure were developed to consider blast loading. Finite element analysis and progressive damage modeling showed that the hybrid composite honeycomb sandwich structure had better blast resistance than the metallic honeycomb sandwich structure.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2022)
Article
Materials Science, Textiles
Kumar Maharshi, Shivdayal Patel
Summary: The issue of variability in natural fiber composite properties has always been a challenge due to factors such as fiber misalignment, irregular crosssection, fiber length, and geometry. This has affected the reliability and selection process of natural fiber composites compared to synthetic fiber counterparts. In this study, the flexural properties of jute fabric composite were investigated through experimental testing and uncertainty analysis. The results showed multimode bending failure and provided insights into the failure behavior of the composite material.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Materials Science, Multidisciplinary
Roopendra Kumar Pathak, Shivdayal Patel, Vijay Kumar Gupta
Summary: The hybridization of ceramic materials significantly improves the ballistic performance and safety levels of armor plates. This study models different types of ceramic plates using finite element software and determines the ballistic behavior of body armors for defense industries.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Mechanical
Murlidhar Patel, Shivdayal Patel
Summary: In this study, dynamic explicit analysis was conducted to evaluate the air-blast performance of various hybrid sandwich designs. The results showed that the hybrid design with foam-filled honeycomb, FML front face, and circular honeycomb core enhanced the blast resistance.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2022)
Article
Engineering, Mechanical
Bheekam Gaur, Murlidhar Patel, Shivdayal Patel
Summary: The effects of strain rate and projectiles' nose shape on the ballistic limit of CRALL were investigated under high-velocity impact. The results show that CRALL has a high ballistic limit for high strain rates or flat-nosed projectiles.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2023)
Article
Materials Science, Composites
Roopendra Kumar Pathak, Shivdayal Patel, Vijay Kumar Gupta, Aswani Kumar Bandaru
Summary: This study showed that combining natural fiber (basalt) with synthetic fiber (Kevlar) and alumina tile composites can enhance the ballistic performance of armor systems, promoting the use of natural reinforcement for eco-friendly armor development. Continuum damage mechanics (CDM) based modeling and Yen's criteria were used to simulate high strain rate situations. Cohesive elements were employed to model damage evolution at inter-layers. The results indicated that panels with basalt composite (B16) and alumina/Kevlar/basalt composite (C1K7B8) showed improved ballistic performance compared to other stacking sequences.
APPLIED COMPOSITE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Murlidhar Patel, Shivdayal Patel
Summary: An explosive attack on a vehicle can cause catastrophic damage, injury, and loss of life. Experimentally evaluating the blast performance is very costly, hazardous, and environmentally polluting. Numerical investigation of blast behavior provides a good alternative.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS
(2023)
Article
Engineering, Mechanical
Murlidhar Patel, Shivdayal Patel, Suhail Ahmad
Summary: The explosive blast poses a significant threat in the form of terrorist attacks on defense, aerospace, and civilian structures. In order to protect human lives and property, researchers have been searching for blast-resistant structures. This study designed a stainless-steel sandwich structure and investigated the performance of aluminum foam-filled honeycomb and carbon fiber reinforced polymer (CFRP) with steel skins. The results showed that using lightweight FRP on the front and back skins of the sandwich structure reduced deflection and improved energy absorption, enhancing the blast resistance.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Murlidhar Patel, Shivdayal Patel
Summary: By combining square and circular honeycombs in various ways, innovative blast-proof steel sandwich panels were developed in this numerical study, which have excellent explosion and impact resistance capabilities. Further work was carried out to achieve successive improvements in the efficiently designed steel sandwich panel's blast mitigation performance by applying different patterns of Al foam filling and fiber metal laminate (FML) facing.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Mechanical
Mahendra Singh Raghav, Shivdayal Patel
Summary: This paper focuses on the effect of spalling on the fatigue life of spur gears. The study reveals that spur gears with spalling fault have a shorter fatigue life compared to those without spalling. It also shows that an increase in backup ratio leads to a significant increase in fatigue life.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
