Frattura ed Integrita Strutturale最新文献_第9页

The Application of PSO in Structural Damage Detection: An Analysis of the Previously Released Publications (2005–2020) PSO在结构损伤检测中的应用：对先前发布的出版物的分析（2005-2020）

Frattura ed Integrita Strutturale Pub Date : 2022-09-22 DOI: 10.3221/igf-esis.62.32

Parsa Ghannadi, S. S. Kourehli, Seyedali Mirjalili

{"title":"The Application of PSO in Structural Damage Detection: An Analysis of the Previously Released Publications (2005–2020)","authors":"Parsa Ghannadi, S. S. Kourehli, Seyedali Mirjalili","doi":"10.3221/igf-esis.62.32","DOIUrl":"https://doi.org/10.3221/igf-esis.62.32","url":null,"abstract":"The structural health monitoring (SHM) approach plays a key role not only in structural engineering but also in other various engineering disciplines by evaluating the safety and performance monitoring of the structures. The structural damage detection methods could be regarded as the core of SHM strategies. That is because the early detection of the damages and measures to be taken to repair and replace the damaged members with healthy ones could lead to economic advantages and would prevent human disasters. The optimization-based methods are one of the most popular techniques for damage detection. Using these methods, an objective function is minimized by an optimization algorithm during an iterative procedure. The performance of optimization algorithms has a significant impact on the accuracy of damage identification methodology. Hence, a wide variety of algorithms are employed to address optimization-based damage detection problems. Among different algorithms, the particle swarm optimization (PSO) approach has been of the most popular ones. PSO was initially proposed by Kennedy and Eberhart in 1995, and different variants were developed to improve its performance. This work investigates the objectives, methodologies, and results obtained by over 50 studies (2005-2020) in the context of the structural damage detection using PSO and its variants. Then, several important open research questions are highlighted. The paper also provides insights on the frequently used methodologies based on PSO, the computational time, and the accuracy of the existing methodologies.","PeriodicalId":38546,"journal":{"name":"Frattura ed Integrita Strutturale","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46378533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Beam-like damage detection methodology using wavelet damage ratio and additional roving mass 基于小波损伤率和附加粗纱质量的梁状损伤检测方法

Frattura ed Integrita Strutturale Pub Date : 2022-09-22 DOI: 10.3221/igf-esis.62.25

Juliana C. Santos, Marcus V. G. de Morais, Marcela R. Machado, Ramon Silva, Erwin U. L. Palechor, Welington V. Silva

引用次数: 0

Quantitative description of low-cycle fatigue damage accumulation in contact interaction zone by local strain evolution 用局部应变演化定量描述接触相互作用区的低周疲劳损伤累积

Frattura ed Integrita Strutturale Pub Date : 2022-09-22 DOI: 10.3221/igf-esis.62.37

Sviatoslav Eleonsky, Y. Matvienko, V. Pisarev, I. Odintsev

{"title":"Quantitative description of low-cycle fatigue damage accumulation in contact interaction zone by local strain evolution","authors":"Sviatoslav Eleonsky, Y. Matvienko, V. Pisarev, I. Odintsev","doi":"10.3221/igf-esis.62.37","DOIUrl":"https://doi.org/10.3221/igf-esis.62.37","url":null,"abstract":"The novel non-destructive method for quantitative description of low-cycle fatigue damage accumulation is expanded to a case of contact interaction in the stress concentration area. Investigated objects are plane aluminium specimens with the centred hole filled by cylindrical steel inclusion. The specimen is subjected to cyclic pull-push loading. The key point, that defines scientific novelty and powerfulness of the developed approach, consists of involving local deformation parameters as current damage indicators. Required strain values follow from distributions of all three displacement components along the filled hole edge measured by reflection hologram interferometry. The data, which are derived at different stages of low-cycle fatigue for the single specimen, provide normalized dependencies of local strain values from number of loading cycle, which are a source of damage accumulation functions. These functions are constructed for the specimen with the filled hole and geometrically analogous specimen with the open hole. Obtained data quantitatively describe a difference in damage accumulation rates for two cases. ","PeriodicalId":38546,"journal":{"name":"Frattura ed Integrita Strutturale","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46221632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of hBN and MoS2 fillers on toughness and thermal stability of carbon fabric-epoxy composites hBN和MoS2填料对碳纤维织物-环氧树脂复合材料韧性和热稳定性的影响

Frattura ed Integrita Strutturale Pub Date : 2022-09-22 DOI: 10.3221/igf-esis.62.17

Y. S. Rao, Shivamurthy Basavannadevaru, Nanjangud Mohan Subbarao, N. Shetty

引用次数: 0

A simplified formula to estimate the load history due to ballistic impacts with bullet splash. Development and validation for finite element simulation of 9x21mm full metal jacket bullets 一个简化的公式，用于估计由于带有子弹飞溅的弹道撞击而产生的载荷历史。9x21mm全金属护套子弹有限元仿真的开发与验证

Frattura ed Integrita Strutturale Pub Date : 2022-09-22 DOI: 10.3221/igf-esis.62.41

Riccardo Andreotti, A. Casaroli, Mauro Quercia, M. Boniardi

引用次数: 2

Deep Learning algorithm for the assessment of the first damage initiation monitoring the energy release of materials 用于评估第一次损伤的深度学习算法监测材料的能量释放

Frattura ed Integrita Strutturale Pub Date : 2022-09-22 DOI: 10.3221/igf-esis.62.34

D. Milone, D. Santonocito

{"title":"Deep Learning algorithm for the assessment of the first damage initiation monitoring the energy release of materials","authors":"D. Milone, D. Santonocito","doi":"10.3221/igf-esis.62.34","DOIUrl":"https://doi.org/10.3221/igf-esis.62.34","url":null,"abstract":"Monitoring the energy release during fatigue tests of common engineering materials has been shown to give relevant information on fatigue properties, reducing the testing time and material consumption. During a static tensile test, it is possible to assess two distinct phases: In the first phase (Phase I), where all the crystals are elastically stressed, the temperature trend follows the linear thermoelastic law; while, in the second phase (Phase II), some crystals begin to deform, and the temperature assumes a non-linear trend. The macroscopic transition stress between Phase I and Phase II could be related to the “limit stress” that, if cyclically applied, would lead to material failure. Nowadays, it is impossible to distinguish the transition between Phase I and Phase II in an objective way. Indeed, it is up to the operator's experiences. This work aims to create a universal methodology that predicts the limit stress by assessing the change in temperature trend by adopting Neural Networks. A Deep Learning algorithm has been created and trained on experimental data coming from static tensile tests performed on several classes of materials (steels, plastics, composite materials). Once trained, the network can predict the transition temperature at which the first plastic deformation occurs within the material.","PeriodicalId":38546,"journal":{"name":"Frattura ed Integrita Strutturale","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48626557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effect of Ti addition and cast part size on solidification structure and mechanical properties of medium carbon, low alloy cast steel Ti添加量和铸件尺寸对中碳、低合金铸钢凝固组织和力学性能的影响

Frattura ed Integrita Strutturale Pub Date : 2022-09-22 DOI: 10.3221/igf-esis.62.15

N. Tenaglia, D. Fernandino, A. Basso

{"title":"Effect of Ti addition and cast part size on solidification structure and mechanical properties of medium carbon, low alloy cast steel","authors":"N. Tenaglia, D. Fernandino, A. Basso","doi":"10.3221/igf-esis.62.15","DOIUrl":"https://doi.org/10.3221/igf-esis.62.15","url":null,"abstract":"In this work, the effect of Ti addition and the cast part size on the solidification structure and mechanical properties of a medium carbon, low alloy cast steel was analyzed. The experimental analysis involved the design of the melts by using Thermo-Calc® software, where different amounts of Ti added to a standard chemical composition of an AISI 13XX steel were simulated. Then, the solidification macrostructure (dendritic pattern and grain size) and microstructure were characterized by using conventional and specific metallographic techniques. Finally, the mechanical behavior in terms of hardness and tensile properties were evaluated. The results show that the addition of 0.12% of Ti promotes a fine dispersion of Ti nitrides and carbides, but when the Ti concentration raises to 0.2%, the size of the Ti nitrides and carbides increases while its amount decreases. Ti nitrides and carbides particles act as nucleation sites for the precipitation of ferrite from austenite, and it was found that the addition of Ti in the higher concentrations refines the solidification macrostructure (dendritic pattern) for both cast part sizes evaluated. Regarding mechanical properties, the addition of Ti does not significantly vary the ultimate tensile strength but reduces the total elongation for cast part sizes","PeriodicalId":38546,"journal":{"name":"Frattura ed Integrita Strutturale","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44247542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The Mechanical properties and statistical analysis of the Charpy impact test using the Weibull distribution in jute-polyester and glass-polyester composites 黄麻-聚酯和玻璃-聚酯复合材料的力学性能及威布尔分布夏比冲击试验的统计分析

Frattura ed Integrita Strutturale Pub Date : 2022-09-22 DOI: 10.3221/igf-esis62.23

T. Tioua, D. Djeghader, B. Redjel

引用次数: 1

Numerical simulation of creep notched bar of P91 steel P91钢缺口棒蠕变的数值模拟

Frattura ed Integrita Strutturale Pub Date : 2022-09-22 DOI: 10.3221/igf-esis.62.18

N. A. Ab Razak, C. Davies

{"title":"Numerical simulation of creep notched bar of P91 steel","authors":"N. A. Ab Razak, C. Davies","doi":"10.3221/igf-esis.62.18","DOIUrl":"https://doi.org/10.3221/igf-esis.62.18","url":null,"abstract":"Numerous components designed for use at elevated temperatures now exhibit multiaxial stress states as a result of geometric modification and material inhomogeneity. It is necessary to anticipate the creep rupture life of such components when subjected to multiaxial load. In this work finite element analysis has been performed to study the influence of different notches, namely blunt and medium notches on the stress distribution across the notch throat during the creep exposure. Within the FE model, a ductility exhaustion model based on the Cocks and Ashby model was utilized to forecast the creep rupture time of notched bar P91 material. The lower and upper bound of creep ductility are employed in the FE analysis. Different notch specimens have different stress and damage distribution. It is shown that for both types of notches, the von Mises stress is lower than the net stress, indicating the notch strengthening effect. The accumulation of creep damage in the minimum cross-section at each element across the notch throat increases over time. The point at which damage first occurs is closer to the notch root for the medium notch than for the blunt notch. The long-term rupture life predicted for blunt notch specimens appears to be comparable to that of uniaxial specimens. The upper bound creep ductility better predicts the rupture life for medium notches.","PeriodicalId":38546,"journal":{"name":"Frattura ed Integrita Strutturale","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48413106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of the Mechanical Property of Friction Stir Welded Heat Treatable Aluminum Alloy by using Bio-Inspired Artificial Intelligence Algorithms 基于仿生人工智能算法的搅拌摩擦焊接热处理铝合金力学性能优化

Frattura ed Integrita Strutturale Pub Date : 2022-09-22 DOI: 10.3221/igf-esis.62.31

Akshansh Mishra, Anish Dasgupta

引用次数: 0