Procedia Structural Integrity最新文献_第10页

Structural Integrity – Historical developments through millennia 结构完整性 - 千百年来的历史发展

Procedia Structural Integrity Pub Date : 2024-01-01 DOI: 10.1016/j.prostr.2024.02.023

Aleksandar Sedmak , Dorin Radu , Simon Sedmak , Mihajlo Arandjelovic

{"title":"Structural Integrity – Historical developments through millennia","authors":"Aleksandar Sedmak , Dorin Radu , Simon Sedmak , Mihajlo Arandjelovic","doi":"10.1016/j.prostr.2024.02.023","DOIUrl":"https://doi.org/10.1016/j.prostr.2024.02.023","url":null,"abstract":"<div><p>In this contribution, historical aspects through millennia of structural integrity development are presented, starting from the Great Pyramids in antient Egypt. Special attention is paid to the history of bridges, made of wood and stone in antient and medieval time, then from different kinds of iron and steel following the first Industrial revolution and finally by concrete, be it reinforced or pre-stresses, in modern times. The focus of this contribution is on bridges restoration, reconstruction and preservation as part of the world heritage. Two case studies are described, the old stone bridge in Mostar (Bosnia and Herzegovina) and a historical iron bridge in Transylvania (Romania). In the second case structural integrity analysis was performed in the form of Engineering Critical Assessment, to provide a solution for retrofitting the historical riveted steel bridge. This paper is dedicated to the memory of Prof. Stojan Sedmak (1929-2014), one of the fathers of the fracture mechanics in Southeast Europe. Motivation for our research is the paper published 12 years ago on the significance and applicability of structural integrity assessment, Sedmak et al (2012), which was based on the presentation at the Tenth Meeting “New Trends in Fatigue and Fracture” (NT2F10) in Metz, France, 2010.</p></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2452321624001707/pdf?md5=659d5adc7989ca9ca4cb6c5a47e3876d&pid=1-s2.0-S2452321624001707-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140309580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of a retrofit system to improve the seismic and energy performances of RC framed buildings 应用改造系统提高钢筋混凝土框架建筑的抗震和节能性能

Procedia Structural Integrity Pub Date : 2024-01-01 DOI: 10.1016/j.prostr.2024.02.025

Gabriele Fichera , Veronica Guardo , Giuseppe Margani , Carola Tardo

{"title":"Application of a retrofit system to improve the seismic and energy performances of RC framed buildings","authors":"Gabriele Fichera , Veronica Guardo , Giuseppe Margani , Carola Tardo","doi":"10.1016/j.prostr.2024.02.025","DOIUrl":"https://doi.org/10.1016/j.prostr.2024.02.025","url":null,"abstract":"<div><p>The need to renovate the existing building stock in earthquake-prone countries is now widely recognized. In this framework, this paper aims at investigating an innovative technology for the seismic, energy and architectural renovation of RC framed buildings. This technology combines the seismic resistance provided by steel trusses with the thermal performance of wood-based panels, which are both applied to the outer building envelope.</p><p>In this paper, the proposed system is applied to a pilot building located in the city of Bucharest, in Romania, to examine its effectiveness and replicability. The pilot building is a five-storey apartment block located in a suburban neighborhood of the city and representative of many coeval buildings in Bucharest that are energy-intensive and earthquakes-prone since they were built before the enforcement of effective seismic and energy efficiency standards.</p><p>The proposed retrofit methodology involves designing wood-based prefabricated panels and steel trusses according to criteria of structural strengthening and energy efficiency, standardization in manufacturing process, fast installation, and architectural integration. Furthermore, the parametric modeling in BIM environment of the above-mentioned components enables controlling their size, quantity, manufacturing, cost, and arrangement on the building façade to optimize the construction and installation processes.</p></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2452321624001720/pdf?md5=e67572b77a7f55426d80b24bdfd123b2&pid=1-s2.0-S2452321624001720-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140309582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An overview of the efficiency of anti-graffiti products in the context of climate change 气候变化背景下的防涂鸦产品效率概览

Procedia Structural Integrity Pub Date : 2024-01-01 DOI: 10.1016/j.prostr.2024.02.008

Jéssica D. Bersch , Inês Flores-Colen , Angela B. Masuero , Denise Dal Molin

{"title":"An overview of the efficiency of anti-graffiti products in the context of climate change","authors":"Jéssica D. Bersch , Inês Flores-Colen , Angela B. Masuero , Denise Dal Molin","doi":"10.1016/j.prostr.2024.02.008","DOIUrl":"https://doi.org/10.1016/j.prostr.2024.02.008","url":null,"abstract":"<div><p>Especially in urban environments, existing buildings are prone to anthropic hazards, such as unauthorized graffiti. Anti-graffiti products may protect surfaces against unwanted paints by acting as sacrificial, semi-permanent or permanent coatings. In addition, under the current climate change scenario, the preservation of the existing buildings is seeking sustainability and reducing maintenance energy and efforts. Therefore, the present study aims to discuss how anti-graffiti products and their related efficiency may be affected by the changing climate and how their performance and durability can present different scenarios. An overview is reported based on existing literature. Concerning the application of protective coatings on polluted environments, distinct anti-graffiti products can be differently affected by atmospheric pollutants, and the cleaning effectiveness of paints may be harmed. Furthermore, the cleaning and protective efficacy of anti-graffiti products may be affected by ageing, highlighting the importance of practical maintenance. The protective solutions’ choice is also fundamental within sustainable practices, pointing to the relevance of environmentally sustainable and low-invasive removal methods. The environmental and economic impacts of anti-graffiti products are closely related to their number of required cleaning cycles.</p></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2452321624001550/pdf?md5=5be68178b263bb5504fbfdac3040db6d&pid=1-s2.0-S2452321624001550-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140309663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical evaluation of the infill pattern upon mechanical proprieties of 3D printed materials 填充图案对 3D 打印材料力学特性的数值评估

Procedia Structural Integrity Pub Date : 2024-01-01 DOI: 10.1016/j.prostr.2024.02.030

Laszlo Racz , Mircea Cristian Dudescu

{"title":"Numerical evaluation of the infill pattern upon mechanical proprieties of 3D printed materials","authors":"Laszlo Racz , Mircea Cristian Dudescu","doi":"10.1016/j.prostr.2024.02.030","DOIUrl":"https://doi.org/10.1016/j.prostr.2024.02.030","url":null,"abstract":"<div><p>The effect of the structure that is printed inside an object, known as infill pattern, on mechanical proprieties of ABS specimens was investigated in this paper. Numerous studies demonstrated that parts created with fused deposition molding (FDM) technology present inferior mechanical properties due to additional porosity and anisotropy caused by the nature of the manufacturing process. In this regard the influence of printing parameters may be analyzed for correct evaluation of mechanical behavior and material constants. The methodology proposed in this paper consists of a numerical simulation of the fused deposition moulding 3D printed specimen, identification of the real cross-sectional area and evaluation of the strain-stress curves of the materials. There are several infill pattern geometries, each with benefits and compromises between material usage, printing time or mechanical strength of the obtained part. The current paper analysed specimens with 100% density (infill rate) but having different infill patterns: grid 0°-90° and ±45°, triangular 60°, fast honeycomb, full honeycomb and wiggle. The results are showing the dependence of the specimen's E modulus with the infill pattern and comparison of the strain-stress curves drawn with full cross-section and numerically calculated ones.</p></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S245232162400177X/pdf?md5=ecde5ad678a536b59dd3e3dbec303240&pid=1-s2.0-S245232162400177X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140332776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A technique for estimation of cyclic stress-strain curves using an optical strain measurement and its application to additively manufactured AlSi10Mg 利用光学应变测量估算循环应力-应变曲线的技术及其在铝硅镁叠加制造中的应用

Procedia Structural Integrity Pub Date : 2024-01-01 DOI: 10.1016/j.prostr.2024.02.045

Radim Halama , Zbyněk Paška , Ajay Vignesh Natarajan , Jiří Hajnyš

{"title":"A technique for estimation of cyclic stress-strain curves using an optical strain measurement and its application to additively manufactured AlSi10Mg","authors":"Radim Halama , Zbyněk Paška , Ajay Vignesh Natarajan , Jiří Hajnyš","doi":"10.1016/j.prostr.2024.02.045","DOIUrl":"https://doi.org/10.1016/j.prostr.2024.02.045","url":null,"abstract":"<div><p>The article describes a new accelerated technique for estimation of cyclic stress-strain curves of cyclically stable materials based on a full-field measurement of strain during low-cycle testing on a large amplitude of loading. Any optical method suitable for capturing the strain contours on the curved part of the specimen during cyclic loading is applicable in the approach developed. In this study, the digital image correlation method is used to measure the deformation on the curved part of the specimen. The technique is presented on chosen results of low-cycle fatigue tests performed on AlSi10Mg printed with selective laser melting technology. Proportional loading cases were performed in tension-compression and pure torsion. The case of non-proportional loading was realized in the form of 90 degree out-of-phase tests. The stress-strain behavior is evaluated using a standard procedure and an accelerated technique with a good correlation for the three loading cases.</p></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2452321624001926/pdf?md5=636ed8c045212223618a9ec992dcf11c&pid=1-s2.0-S2452321624001926-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140332803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fatigue behaviour of SLM maraging steel under variable-amplitude loading SLM 马氏体时效钢在变幅加载下的疲劳行为

Procedia Structural Integrity Pub Date : 2024-01-01 DOI: 10.1016/j.prostr.2024.02.047

Zbigniew Marciniak , Ricardo Branco , Wojciech Macek , Cândida Malça

引用次数: 0

FFT-based homogenisation for Thin Plate Structures 基于 FFT 的薄板结构均质化技术

Procedia Structural Integrity Pub Date : 2024-01-01 DOI: 10.1016/j.prostr.2023.12.075

Haolin Li , Zahra Sharif Khodaei , M.H. Aliabadi

引用次数: 0

Particle Shape Complexity Reduction for Estimation of Effective Elastic Properties of the Composite 降低颗粒形状复杂性以估算复合材料的有效弹性特性

Procedia Structural Integrity Pub Date : 2024-01-01 DOI: 10.1016/j.prostr.2023.12.040

Pascal Alexander Happ , Romana Piat

引用次数: 0

Porous Sericin/PVA/Moringa oleifera Hydrogels: Physical Properties and Hyperelastic Model 多孔丝胶/PVA/Moringa oleifera 水凝胶：物理性质和超弹性模型

Procedia Structural Integrity Pub Date : 2024-01-01 DOI: 10.1016/j.prostr.2023.12.041

Dita Puspitasari , Ahmad M. Anwar , Della S.G. Ananda , Ghullam Reza , Annisa Jusuf , Lia A.T.W. Asri

{"title":"Porous Sericin/PVA/Moringa oleifera Hydrogels: Physical Properties and Hyperelastic Model","authors":"Dita Puspitasari , Ahmad M. Anwar , Della S.G. Ananda , Ghullam Reza , Annisa Jusuf , Lia A.T.W. Asri","doi":"10.1016/j.prostr.2023.12.041","DOIUrl":"https://doi.org/10.1016/j.prostr.2023.12.041","url":null,"abstract":"<div><p>One method of treating diabetic foot ulcers (DFU), especially superficial and deep ulcers, is by using a wound scaffold in the form of a hydrogel. Sericin derived from silkworm cocoons is a promising hydrogel material candidate. Sericin protein is a part of silk that is rarely used but has the potential for biocompatibility, biological activities, and is easy to process. One of the drawbacks of sericin hydrogels is their lower mechanical properties. Therefore, sericin was composited with PVA through the freeze-thaw technique to obtain a hydrogel with good stability. Sericin/PVA hydrogel was prepared with variations in solution concentration and the ratio of PVA and sericin. It resulted in the hydrogel with interconnected pore structures. Hydrogel-based wound dressings are often chosen for the treatment of DFU in combination with herbal extract. <em>Moringa oleifera</em> leaves extract was embedded into sericin/PVA hydrogel as a substance to heal DFU. In this study, the morphological and structural properties of sericin/PVA hydrogels were evaluated. The micro-CT imaging analysis was done to confirm hydrogel structure and calculate its porosity percentage. The compression test and hyperelasticity validity test were done to validate the hyperelastic material model.</p></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2452321623007394/pdf?md5=c7abb517ab499e450e7183143cc39cee&pid=1-s2.0-S2452321623007394-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139674510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recovery of Interlaminar Tensile Stresses in Curved Laminates Subject to Biaxial Flexure: The Case of an Elastically Induced Curvature Purposely Misaligned with the Principal Directions of Initial Curvature 受双轴挠曲作用的曲面层压板层间拉应力的恢复：弹性诱导曲率与初始曲率主要方向故意错位的情况

Procedia Structural Integrity Pub Date : 2024-01-01 DOI: 10.1016/j.prostr.2023.12.054

Lorenzo Marchignoli , Enrico Bertocchi , Matteo Giacopini , Valerio Mangeruga

{"title":"Recovery of Interlaminar Tensile Stresses in Curved Laminates Subject to Biaxial Flexure: The Case of an Elastically Induced Curvature Purposely Misaligned with the Principal Directions of Initial Curvature","authors":"Lorenzo Marchignoli , Enrico Bertocchi , Matteo Giacopini , Valerio Mangeruga","doi":"10.1016/j.prostr.2023.12.054","DOIUrl":"https://doi.org/10.1016/j.prostr.2023.12.054","url":null,"abstract":"<div><p>Many literature contributions deal with the evaluation at FE post-processing stage of the interlaminar normal stress distribution in moderately thick single or doubly curved laminates subject to flexure, based on through-the-thickness equilibrium relations. Most of the contributions, however, discuss test cases in which the principal directions of the load-induced elastic curvatures are aligned with the principal directions of the initial curvature; this condition is not general. In the present work, a simple post-processing methodology for the recovery of the interlaminar tensile stress is presented.</p><p>The procedure retrieves the Interlaminar Tensile Stresses (ILTS) distribution in a doubly curved laminate modelled through common wise quadrilateral shell Finite Elements and is based on customary FE sub-model which inputs are the displacements and rotation calculated on the shell structure. At the moment the sub-model can't retrieves Interlaminar Shear Stresses but can be further enhanced to do it.</p><p>In this paper the methodology is successfully applied to an open thin walled profile in torsion test case, in which the principal directions of elastic curvature are strongly misaligned with the principal directions of initial curvature.</p></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2452321623007540/pdf?md5=d83ef724768515606c3f803a1aaf6110&pid=1-s2.0-S2452321623007540-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139674527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0