Frattura ed Integrità Strutturale最新文献_第7页

Optimization of damage repair with piezoelectric actuators using the Taguchi method 使用田口方法优化压电致动器的损伤修复

Frattura ed Integrità Strutturale Pub Date : 2023-12-17 DOI: 10.3221/igf-esis.67.10

Abdul Aabid Shaikh, Meftah Hriari, J. S. Mohamed Ali

{"title":"Optimization of damage repair with piezoelectric actuators using the Taguchi method","authors":"Abdul Aabid Shaikh, Meftah Hriari, J. S. Mohamed Ali","doi":"10.3221/igf-esis.67.10","DOIUrl":"https://doi.org/10.3221/igf-esis.67.10","url":null,"abstract":"Over the last two decades, piezoelectric actuators have emerged as a promising solution for structural repair. In this work, initially the stress intensity factor (SIF) estimation using the finite element (FE) approach at crack tips in aluminium 2024-T3 plates. Based on Taguchi’s L9 orthogonal array the FE simulation has been conducted. Later, this study uses the optimization method via the design of experiments to systematically evaluate the effect of various dimensions and material qualities, especially under the conditions of Mode-I crack propagation. It also investigated the complex interaction of factors impacting adhesive bonds, piezoelectric actuators, and aluminium plates, The study not only analyses the parameter relationships but also examines their controls, identifying those best aligned with primary objectives. This sensitivity enhances the piezoelectric actuator's efficacy and quality. The research determines an optimal parameter combination, developing active repair performance and establishing an essential SIF benchmark. This research explores the complex world of piezoelectric actuator-assisted repairs, providing a road map for better structural rehabilitation.","PeriodicalId":507970,"journal":{"name":"Frattura ed Integrità Strutturale","volume":"328 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139176474","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

Finite-element simulation of residual stresses induced by laser shock peening in TC4 samples structurally similar to a turbine blade 对结构类似于涡轮叶片的 TC4 样品中激光冲击强化引起的残余应力进行有限元模拟

Frattura ed Integrità Strutturale Pub Date : 2023-12-17 DOI: 10.3221/igf-esis.67.01

Anastasiia Kostina, Maxim Zhelnin, Sathya Swaroop, Alena Vedernikova, Mariia Bartolomei

{"title":"Finite-element simulation of residual stresses induced by laser shock peening in TC4 samples structurally similar to a turbine blade","authors":"Anastasiia Kostina, Maxim Zhelnin, Sathya Swaroop, Alena Vedernikova, Mariia Bartolomei","doi":"10.3221/igf-esis.67.01","DOIUrl":"https://doi.org/10.3221/igf-esis.67.01","url":null,"abstract":"This study is devoted to the investigation of residual stresses distribution (RSD) in a TC4 sample treated with laser shock peening. The study placed special emphasis on analyzing the RSD at the part of the samples structurally similar to a turbine blade, which is more frequently subjected to damage during service according to the aircraft statistics. Results of simulation showed that low power density of 1.11 GWt/cm2 could not induce compressive residual stress on the surface of a treated object. Furthermore, increasing the overlapping of laser spots does not improve the situation and still fail to induce surface compressive residual stress at a laser intensity of 1.11 GWt/cm2. The compressive stresses occur only with the rise in power density. Reducing the spot size from 3 mm to 1 mm for the power density of 10 GWt/cm2 results in a 20% increase in the magnitude of compressive residual stress in the area of interest. Moreover, applying 35% overlapping further enhances this value. In addition to increasing the magnitude of residual stress, this approach also leads to a more homogeneous RSD of the treated material.","PeriodicalId":507970,"journal":{"name":"Frattura ed Integrità Strutturale","volume":"61 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139176527","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

Structural integrity analysis of the pre-stressed concrete dome of the Belgrade fair hall 1 贝尔格莱德 1 号展厅预应力混凝土穹顶的结构完整性分析

Frattura ed Integrità Strutturale Pub Date : 2023-12-17 DOI: 10.3221/igf-esis.67.24

M. Jelić, A. Sedmak, B. Folić, S. Sedmak, M. Aranđelović, R. Folić, D. Radu

引用次数: 0

Experimental and Numerical Study on Vibration-Based Damage Detection and Localization in Laminated Composite Plates 基于振动的层状复合板损伤检测和定位的实验与数值研究

Frattura ed Integrità Strutturale Pub Date : 2023-12-17 DOI: 10.3221/igf-esis.67.12

Saeesh Verenkar Saeesh Verenkar, I. Sridhar, Vinayak Uppin, P. S. Shivakumar Gouda

{"title":"Experimental and Numerical Study on Vibration-Based Damage Detection and Localization in Laminated Composite Plates","authors":"Saeesh Verenkar Saeesh Verenkar, I. Sridhar, Vinayak Uppin, P. S. Shivakumar Gouda","doi":"10.3221/igf-esis.67.12","DOIUrl":"https://doi.org/10.3221/igf-esis.67.12","url":null,"abstract":"Damage detection in composite materials is crucial for ensuring the safety and reliability of engineering structures. Conventional methods often face challenges in accurately identifying damage in plate-like structures, particularly in scenarios involving multiple damages or small-scale delamination. This study focuses on investigating the detection and localization of delamination in composite plates by employing both experimental and numerical modal analysis. An eight-ply woven Glass-Epoxy composite laminate with and without damage was prepared with the aid of hand lamination technique. Laminate was fixed to a Clamped-Free-Free-Free (CFFF) boundary condition for experimental modal analysis by introducing controlled damage to examine its impact on modal properties. To validate the natural frequencies (NFs) of damaged and undamaged composite laminates, a numerical analysis was conducted using ANSYS Parametric Design Language (APDL). Further, to advance the understanding of using modal shapes and their spatial derivatives for damage localization in composite plates under various damage situations, post-processing of simulation results was conducted using MATLAB. Finite Difference Method has been employed to calculate the derivatives, and a novel damage index (DI) is proposed to enhance damage localization capabilities. The results affirm that the proposed DI is effective and precise in identifying damage in plate-like structures, both for individual and multiple damage scenarios. This research study presents a novel approach for identifying and pinpointing damage in composite plates, thereby making a valuable contribution to the field of structural health monitoring (SHM) applications","PeriodicalId":507970,"journal":{"name":"Frattura ed Integrità Strutturale","volume":"398 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139176808","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