Procedia Structural Integrity最新文献

{"title":"Fracture simulation in multiphase materials via ALE-driven cohesive interface strategy","authors":"Umberto De Maio ,&nbsp;Francesco Fabbrocino ,&nbsp;Daniele Gaetano ,&nbsp;Fabrizio Greco ,&nbsp;Andrea Pranno ,&nbsp;Alessandra Silvestri","doi":"10.1016/j.prostr.2025.12.349","DOIUrl":"10.1016/j.prostr.2025.12.349","url":null,"abstract":"<div><div>In this work, we present a numerical methodology for simulating crack initiation and propagation in multiphase materials. The approach integrates an Arbitrary Lagrangian–Eulerian (ALE) formulation with an adaptive cohesive interface model, allowing for the dynamic alignment of the crack path and the insertion of cohesive elements along mesh boundaries, without requiring re-meshing. Crack propagation directions are determined based on a stress criterion, while the cohesive interfaces follow a traction–separation law capable of capturing complex failure mechanisms, especially in the presence of material discontinuities between phases. This strategy effectively reduces computational costs and mitigates mesh-dependence issues commonly encountered in standard cohesive zone models. Numerical results confirm the robustness of the proposed framework in predicting arbitrarily evolving crack paths.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"79 ","pages":"Pages 386-393"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147406665","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}

{"title":"An HDST based XIGA Approach for Vibration Analysis of Cracked Bi-Directional Functionally Graded Plates","authors":"Pranaw Parihar ,&nbsp;Sunil Kumar Singh","doi":"10.1016/j.prostr.2025.12.351","DOIUrl":"10.1016/j.prostr.2025.12.351","url":null,"abstract":"<div><div>Bi-directional functionally graded materials (BDFGMs), where properties vary in both in-plane and thickness directions, are increasingly used in aerospace components/structures to improve vibration performance through tailored stiffness and mass distribution. However, cracks inevitably develop during in-service conditions and can significantly influence their vibration behavior, making their consideration essential in vibration analysis and design. To address this, an extended isogeometric analysis (XIGA) in conjunction with higher-order shear deformation theory (HDST) is employed for the first time to investigate the vibration behavior of BDFG plates containing the through-the-thickness crack. HSDT naturally captures the shear deformation effect, whereas the NURBS basis functions of XIGA inherently satisfy the higher-order requirement of the HSDT plate kinematics. The materials are graded in two directions, and effective properties are obtained using the rule of mixtures. The proposed method is first validated against benchmark solutions for FGM plates with property variation only in the thickness direction. Subsequently, a parametric study is conducted to analyze the effects of crack length, orientation, boundary conditions, and material gradation on the natural frequencies and mode shapes. The results show excellent agreement with reference data and emphasize the critical role of both cracks and material gradation in the vibrational response. The developed HDST-XIGA framework offers a reliable and accurate tool for the dynamic analysis of BDFGMs.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"79 ","pages":"Pages 404-412"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147406693","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}

{"title":"Probabilistic Analysis of Cold Expanded Holes","authors":"Luciano Smith ,&nbsp;David Wieland","doi":"10.1016/j.prostr.2025.12.334","DOIUrl":"10.1016/j.prostr.2025.12.334","url":null,"abstract":"<div><div>Many aircraft make use of cold expanded (Cx) holes to increase the life of select fastener holes. Currently there is not an accepted method to predict the life at Cx holes accounting for the physics of the process. The Engineered Residual Stress Implementation (ERSI) Working Group has been actively pursuing methods to accurately predict the fatigue crack growth life of Cx holes. Recently the ERSI working group led a round robin exercise focusing on how uncertainty in fatigue response due to the random variability in residual stresses at Cx fastener holes can be captured in damage tolerance analysis (DTA). The round robin was conducted in a single blind fashion. While most of the respondents to the round robin provided deterministic analysis, Southwest Research Institute (SwRI) also performed a probabilistic analysis to better account for random variables. By performing this probabilistic analysis, SwRI is able to identify the sensitivities in the DTA to the input parameters. Once the sensitivities are known, they can be used to determine the parameters that need to tracked for use in a digital twin. This paper demonstrates how progressively addressing parameter uncertainties can reduce the overall uncertainties in the crack growth prediction.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"79 ","pages":"Pages 275-282"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147406708","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}

{"title":"Accumulated plastic strain prediction of LPBF alloy under fatigue load based on CPFEM and incremental neural network","authors":"Qinghui Huang ,&nbsp;Pengbo Wang ,&nbsp;Lei Bian ,&nbsp;Meng Zhao ,&nbsp;Pablo Lopez-Crespo ,&nbsp;Ivan Sergeichev ,&nbsp;Filippo Berto ,&nbsp;Wenqi Liu ,&nbsp;Guian Qian","doi":"10.1016/j.prostr.2025.12.336","DOIUrl":"10.1016/j.prostr.2025.12.336","url":null,"abstract":"<div><div>In this study, the micromechanical response of a representative volume element (RVE) under cyclic loading was simulated using the crystal plasticity finite element method (CPFEM) to obtain the local stress-strain response and accumulated plastic strain. Based on the high-fidelity data generated by CPFEM, an incremental neural network (INN) model was constructed. The INN model takes the load ratio and the current accumulated plastic strain as inputs to predict the corresponding accumulated plastic strain increment for a given number of cycles. Compared with traditional fatigue prediction models, this model does not require presetting empirical equations. The results demonstrate that this incremental learning approach can effectively capture the nonlinear evolution of plastic strain with the number of cycles. The developed single-hidden-layer INN model accurately predicts the plastic strain accumulation process in laser powder bed fusion (LPBF) GH4169 (Inconel 718) under cyclic loading and achieves the highest prediction accuracy.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"79 ","pages":"Pages 291-297"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147406709","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}

{"title":"Finite Element Simulation of Cracked Dentin","authors":"Mays H. Udah ,&nbsp;Qassim M. Doos ,&nbsp;Ahmed Al-Mukhtar","doi":"10.1016/j.prostr.2025.12.307","DOIUrl":"10.1016/j.prostr.2025.12.307","url":null,"abstract":"<div><div>Cracking in teeth is often caused by defects, aging, or poorly designed fillings. Vertical opening fractures are particularly common. Therefore, Mode-I fracture mechanics were applied in the current simulation based on the simulated stress distribution at the dentin. Using finite element analysis, the crack path and fracture behavior were simulated. An oblique bite force of 453 N, applied at a 45° angle to the longitudinal axis of the tooth structure, was used. Minimum and maximum dentin properties were investigated to assess their influence on fracture initiation and propagation. Three different load levels were applied to examine and compare the degree of crack propagation and the effect of varying loads on crack growth. Results showed that teeth with maximum anisotropic dentin required approximately 100 N more force than those with minimum properties to transition into the crack development phase. The stress intensity factor (SIF), which determines stress concentration and crack tip propagation, was calculated for the applied loads. Higher loads resulted in higher SIF values, thereby reducing fatigue life.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"79 ","pages":"Pages 53-64"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147407435","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}

{"title":"Microstructure and mechanical properties of two quenched and tempered steels for industrial undercarriage track links: A preliminary comparison","authors":"Lorenzo Antonioli ,&nbsp;Chiara Soffritti ,&nbsp;Cindy Morales ,&nbsp;Denis Benasciutti ,&nbsp;Elena Capatti ,&nbsp;Mattia Merlin","doi":"10.1016/j.prostr.2025.12.302","DOIUrl":"10.1016/j.prostr.2025.12.302","url":null,"abstract":"<div><div>Thanks to their resistance to static and fatigue loads, quenched and tempered (Q&amp;T) steels are widely used to produce track links for undercarriage systems of industrial machines, which operate under severe mechanical and environmental conditions. This preliminary study investigates the fatigue properties of two Q&amp;T forged steels: the 27MnCrB5-2 steel subjected to a low-temperature tempering treatment to reduce the environmental impact of industrial production, and the carbon-neutral 36CTR4 steel tempered at a higher temperature. Tensile and rotating bending fatigue tests were carried out on specimens directly extracted from heat-treated track links. Static properties enabled a preliminary calibration of the stress amplitude levels for fatigue testing, while microstructural characterization by optical microscopy (OM) and scanning electron microscopy (SEM) was performed to understand the influence of microstructure on the fatigue properties of the investigated steels. Preliminary fatigue data were analyzed using a bi-conditional probability–stress–life (P-S-N) model, enabling a robust statistical evaluation of fatigue resistance. The results confirmed the effectiveness of the selected heat treatments in ensuring reliable mechanical performance.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"79 ","pages":"Pages 1-8"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147407437","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}

{"title":"Development and Mechanical Characterization of a Novel Ni-Ti Based Damping Seismic Device","authors":"Girolamo Costanza ,&nbsp;Alessandro Molinari ,&nbsp;Ilaria Porroni ,&nbsp;Maria Elisa Tata","doi":"10.1016/j.prostr.2025.12.303","DOIUrl":"10.1016/j.prostr.2025.12.303","url":null,"abstract":"<div><div>Traditional seismic devices suffer from residual deformation issues that compromise structural resilience and require extensive post-earthquake repairs. An innovative seismic self-centering device based on Ni-Ti shape memory elements for enhanced structural performance and damping is presented in this work. The investigation encompasses both L-shaped sheet and helical spring configurations tested under quasi-static conditions, with individual component characterization across two temperature conditions (25°C and 100°C), followed by comprehensive evaluation of assembly configurations including Ni-Ti sheets, steel baseline comparison, and combined Ni-Ti sheet-spring systems.</div><div>Experimental results demonstrate distinct performance trade-offs among SMA configurations. Combined Ni-Ti sheet-spring assemblies optimize self-centering capability (99.5% recovery) with highest force capacity (224.5N) but reduced energy dissipation (8.1 x 10⁴J/m³), while individual L-shaped Ni-Ti sheet configurations provide balanced performance across all metrics, showing promising characteristics in terms of load, displacement and energy dissipation.</div><div>Temperature analysis revealed substantial force enhancement of +121% from 25°C to 100°C at 2.5mm displacement, establishing thermal control as a design parameter. At 25°C, L-shaped configurations achieve forces of 40.9-206.8N with energy dissipation of 8.1 x 10³ - 1.89 x 10⁵J/m³, while elevated temperature testing demonstrates enhanced force capacity up to 405N with increased energy dissipation up to 2.82 x 10⁵J/m³. The experimental results demonstrate that the proposed SMA sheet configurations exhibit reliable energy dissipation characteristics, maintaining consistent self-centering capabilities across the tested temperature and load range. These findings establish experimental foundation for future dynamic validation studies and contribute to the advancement of SMA-based damping systems for structural seismic protection.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"79 ","pages":"Pages 9-16"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147407438","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}

{"title":"A comprehensive long term monitoring system of an iconic heritage complex: the Assisi Basilica case study","authors":"Daniele Storni ,&nbsp;Harpal Singh ,&nbsp;Gianni Alessandroni ,&nbsp;Nicola Di Donato ,&nbsp;Marco Giuseppe Moroni ,&nbsp;Sergio Fusetti ,&nbsp;Davide Ciarlariello ,&nbsp;William Yang ,&nbsp;Claudio Martino ,&nbsp;Herbert Gross ,&nbsp;Domenico Patanè ,&nbsp;Giuseppe Occhipinti","doi":"10.1016/j.prostr.2025.12.031","DOIUrl":"10.1016/j.prostr.2025.12.031","url":null,"abstract":"<div><div>The Basilica of Assisi (Italy), built in 1228, has been a UNESCO World Heritage Site of unparalleled historical and artistic value since 2000. Located in one of Italy’s most seismically active areas, it was damaged during the 1997 earthquake (Mw 6.0), when part of the nave collapsed. The Basilica was restored over the following years. To safeguard this iconic structure, the authors implemented a long-term monitoring system on bell tower between 2022 and 2023. The sensor network includes six triaxial ultra-low-noise Epson M-A552 accelerometers on the bell tower, and an INGV OSU seismic station, equipped with an ETL3D/5s velocimeter and ultra-low-noise Epson M-A352 accelerometer, installed at the base of the structure. All the collected data, managed through the Wise Robotics cloud-based platform for efficient analysis and accessibility, contributes to identifying the structure’s dynamic behavior and potential anomalies. This research analyses the modal behavior of the bell tower that was tracked in the last two years, effects of recent seismic events on the tower are discussed and the effect of weather parameters on frequencies is exposed. Looking ahead to future expansion of the monitoring network, the project contributes to the preservation of the Basilica of Assisi and in advancing knowledge of the long-term behavior of monumental structures under complex loading conditions.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"78 ","pages":"Pages 237-244"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147408172","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}

{"title":"Dynamic Identification for Retrofitting Assessment of Reinforced Concrete Buildings with Shaking Table: Preliminary Results","authors":"Marco Martino Rosso ,&nbsp;Mahsa Daneshi Mamaghani ,&nbsp;Maurizio Bottini ,&nbsp;Guido Camata ,&nbsp;Giuseppe Carlo Marano ,&nbsp;Alessandro Contento ,&nbsp;Giuseppe Quaranta","doi":"10.1016/j.prostr.2025.12.039","DOIUrl":"10.1016/j.prostr.2025.12.039","url":null,"abstract":"<div><div>This work presents preliminary results from an ongoing numerical and experimental investigation aimed at supporting the seismic design and performance evaluation of a retrofitting system for reinforced concrete (RC) buildings. Shaking table tests were conducted on two full-scale, three-dimensional, single-bay, three-storey RC buildings, which included internal infills and partitions. Specifically, this study focuses on assessing the effects of a seismic retrofitting intervention installed on one of the two structures based on the output-only operational modal identification of the tested specimens. In particular, a sequence of white noise excitations was applied alternatively in between successive scaled Irpinia earthquake ground motions of progressively increasing amplitude. Frequency Domain Decomposition and Covariance-based Stochastic Subspace Identification were adopted using the PyOMA2 software. The preliminary dynamic identification results were compared with a modal analysis of a Finite Element Model of the RC real-scale specimen implemented in the Scientific Toolkit for OpenSees (STKO) software. The experimental results show quite a good agreement in terms of natural frequencies and the expected damping ratio. Future studies may also explore retrofitting assessment with input-output dynamic characterization or even machine learning-based methods.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"78 ","pages":"Pages 301-308"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147408195","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}

{"title":"The Strambino bridge, 20 years later: preliminary assessment of scour effects on a retrofitted bridge","authors":"Andrea Pozè Falet,&nbsp;Marco Civera,&nbsp;Mauro Aimar,&nbsp;Antonino Quattrone,&nbsp;Donato Sabia,&nbsp;Bernardino Chiaia,&nbsp;Sebastiano Foti","doi":"10.1016/j.prostr.2025.12.042","DOIUrl":"10.1016/j.prostr.2025.12.042","url":null,"abstract":"<div><div>For river-crossing bridges and viaducts, scour detection plays an increasingly critical role, especially in the context of ageing bridges and intensifying climate-related events. In this context, this study presents the initial findings of a comprehensive investigation into the Strambino Bridge, a five-span, prestressed concrete road bridge spanning the Dora Baltea River near Turin, Italy. In 2003, one of its central piers experienced significant scouring, prompting a structural consolidation that led to its complete retrofitting. Dynamic identification campaigns were conducted pre- and post-consolidation. These campaigns and their outcomes remain a notable reference for full-scale, real-world applications of vibration-based inspection for anomaly detection and Structural Health Monitoring (SHM), carried out before such techniques became widely adopted. The present work revisits these historic datasets and supplements them with new measurements performed in 2024 during a similar three-day-long campaign of output-only field tests. In particular, by applying an Automated Operational Modal Analysis (AOMA) algorithm to all recordings, the modal parameters (natural frequencies, damping ratios, and mode shapes) have been identified and compared across time (2003, 2004, and 2024) and spans (C1 to C5) for all the simply supported decks. The analysis reveals the capacity of anomaly-sensitive indices to reliably identify scour-induced effects. Furthermore, the novel 2024 data are here preliminarily interpreted according to such indices to assess the possible recurrence of scour. In conclusion, this study highlights the long-term value of dynamic (vibration-based) monitoring for the early detection of scour and structural degradation in road bridges.</div></div>","PeriodicalId":20518,"journal":{"name":"Procedia Structural Integrity","volume":"78 ","pages":"Pages 325-332"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147408200","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}