International Journal of Damage Mechanics最新文献_第9页

Entropy-based damage model for assessing the remaining useful fatigue life 用于评估剩余有用疲劳寿命的基于熵的损伤模型

IF 4.2 2区工程技术

International Journal of Damage Mechanics Pub Date : 2023-12-02 DOI: 10.1177/10567895231215474

Ali Mahmoudi, Arash P. Jirandehi, Mohammad Ali Amooie, M. Khonsari

引用次数: 0

A new damage constitutive model for frozen-thawed sandstone under triaxial conditions: Considering the characteristics of pre-peak compaction and post-peak residual strength 三轴条件下冻融砂岩的新破坏构造模型：考虑峰前压实和峰后残余强度的特征

IF 4.2 2区工程技术

International Journal of Damage Mechanics Pub Date : 2023-11-28 DOI: 10.1177/10567895231215555

Xin Xiong, K. Zhou, Feng Gao, Chun Xu, Jie-lin Li

{"title":"A new damage constitutive model for frozen-thawed sandstone under triaxial conditions: Considering the characteristics of pre-peak compaction and post-peak residual strength","authors":"Xin Xiong, K. Zhou, Feng Gao, Chun Xu, Jie-lin Li","doi":"10.1177/10567895231215555","DOIUrl":"https://doi.org/10.1177/10567895231215555","url":null,"abstract":"The study of the constitutive model under stress loading for rock after undergoing freeze-thaw weathering cycles (FTWCs) treatment has important theoretical significance for the site operation and numerical calculation of rock mass engineering in cold regions. In this work, a series of FTWCs treatment tests of sandstone were carried out, and the evolution characteristics of the T2 spectrum distribution curve for sandstone before and after FTWCs treatment were analyzed utilizing nuclear magnetic resonance (NMR) technology. The schematic diagram of freeze-thaw damage evolution for sandstone was drawn, and the damage evolution mechanism was analyzed. Evolution laws of the stress-strain curves, peak and residual strength, peak and residual strain, and Young's modulus of sandstone under different FTWCs and confining pressures were analyzed by conventional triaxial compression tests. A piecewise constitutive model under triaxial stress loading for sandstone after undergoing FTWCs treatment was established, and the model considered the significant influence of FTWCs on the nonlinear deformation in the compaction stage and residual strength. By introducing error analysis indexes, the proposed model and published models were compared with the experimental data, it was found that the proposed model's performance is better than the published models, which indicated that the proposed model has good performance and strong universality.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"94 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139222445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characteristics of orthopaedic implants damage and mechanisms of its initiation 骨科植入物损坏的特点及其引发机制

IF 4.2 2区工程技术

International Journal of Damage Mechanics Pub Date : 2023-11-28 DOI: 10.1177/10567895231212329

Adrian Łukaszewicz, M. Kopeć, Grzegorz Szczęsny, Zbigniew L. Kowalewski

{"title":"Characteristics of orthopaedic implants damage and mechanisms of its initiation","authors":"Adrian Łukaszewicz, M. Kopeć, Grzegorz Szczęsny, Zbigniew L. Kowalewski","doi":"10.1177/10567895231212329","DOIUrl":"https://doi.org/10.1177/10567895231212329","url":null,"abstract":"Implant fractures complicate orthopaedic procedures requiring secondary surgeries. However, it is not exactly known when the damage initiation starts and which factors predispose them to the highest degree. Thus, the aim of the study was to characterize changes observed in orthopaedic implants after their removal from the bone. Particular efforts were made to determine, which of them occur during the process of its production, installation, usage and removal. Such identification enabled to specify the role of lesions emerging during each period and their role in the implant’s deformation or fracture. The paper was focused on implants dedicated to the stabilization of the femur fractures since the bone transfers the highest loads. External surface and geometric features of eight representative implants were observed under standard and stereoscopic cameras, as well as under light and scanning electron microscopes. Macroscopic analysis of the investigated implants exhibited a number of defects in the form of scratches, abrasions, deformations and chipping. The wear degree of each implant was different and strictly depended on how it was implanted in the patient's body, as well as on how the patient exploited it through his mobility. Four different sources of implant integrity changes were identified: manufacturing-related changes, implant application-related changes, daily life-related changes and implant removal-related changes.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"464 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139222608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effects of boundary and inhomogeneities on the delamination of a bi-layered material system 边界和不均匀性对双层材料系统分层的影响

IF 4.2 2区工程技术

International Journal of Damage Mechanics Pub Date : 2023-11-25 DOI: 10.1177/10567895231216008

Chunlin Wu, Huiming Yin

{"title":"The effects of boundary and inhomogeneities on the delamination of a bi-layered material system","authors":"Chunlin Wu, Huiming Yin","doi":"10.1177/10567895231216008","DOIUrl":"https://doi.org/10.1177/10567895231216008","url":null,"abstract":"The inclusion-based boundary element method (iBEM) is developed to calculate the elastic fields of a bi-layered composite with inhomogeneities in one layer. The bi-material Green’s function has been applied to obtain the elastic field caused by the domain integral of the source fields on inclusions and the boundary integral of the applied loads on the surface. Using Eshelby’s equivalent inclusion method (EIM), the material mismatch between the particle and matrix phases is simulated with a continuously distributed source field, namely eigenstrain, on inhomogeneities so that the iBEM can calculate the local field. The stress singularity along the interface leads to the delamination of the bimaterials under a certain load. The crack’s energy release rate ( J) is obtained through the J-integral, which predicts the stability of the delamination. When the stiffness of one layer increases, the J-integral increases with a higher gradient, leading to lower stability. Particularly, the effect of the boundary and inhomogeneity on the J-integral is illustrated by changing the crack length and inhomogeneity configuration, which shows the crack is stable at the beginning stage and becomes unstable when the crack tip approaches the boundary; a stiffer inhomogeneity in the neighborhood of a crack tip decreases J and improves the fracture resistance. For the stable cracking phase, the J-integral increases with the volume fraction of inhomogeneity are evaluated. The model is applied to a dual-glass solar module with air bubbles in the encapsulant layer. The stress distribution is evaluated with the iBEM, and the J-integral is evaluated to predict the delamination process with the energy release rate, which shows that the bubbles significantly increase the J-integral. The effect of the bubble size, location, and number on the J-integral is also investigated. The present method provides a powerful tool for the design and analysis of layered materials and structures.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"34 37","pages":""},"PeriodicalIF":4.2,"publicationDate":"2023-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139237121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A multi-scale model from microscopic cracks to macroscopic damage of concrete at elevated temperatures 高温下混凝土从微观裂缝到宏观损伤的多尺度模型

IF 4.2 2区工程技术

International Journal of Damage Mechanics Pub Date : 2023-11-22 DOI: 10.1177/10567895231215554

Bin Sun, Tong Guo

引用次数: 0

Effect of printing direction on fatigue response and damage development in additive manufactured Haynes 282 nickel superalloy 打印方向对增材制造Haynes 282镍高温合金疲劳响应和损伤发展的影响

2区工程技术

International Journal of Damage Mechanics Pub Date : 2023-11-07 DOI: 10.1177/10567895231204951

Mateusz Kopec, Xiaochuan Liu, Dominik Kukla, Ryszard Sitek, Zbigniew L Kowalewski

引用次数: 0

Creep behavior of sandstone under the coupling action of stress and pore water pressure using three-dimensional digital image correlation 利用三维数字图像相关技术研究应力与孔隙水压力耦合作用下砂岩的蠕变行为

2区工程技术

International Journal of Damage Mechanics Pub Date : 2023-11-03 DOI: 10.1177/10567895231209838

Cancan Chen, Heping Xie, Jiang Xu, Shoujian Peng, Cunbao Li, Minghui Li

{"title":"Creep behavior of sandstone under the coupling action of stress and pore water pressure using three-dimensional digital image correlation","authors":"Cancan Chen, Heping Xie, Jiang Xu, Shoujian Peng, Cunbao Li, Minghui Li","doi":"10.1177/10567895231209838","DOIUrl":"https://doi.org/10.1177/10567895231209838","url":null,"abstract":"Understanding the damage evolution and time-dependent property of rock creep is of great significance for predicting geohazards and evaluating the long-term stability of geotechnical structures. In this study, a three-dimensional digital image correlation system was adopted to investigate the creep behavior of sandstone under the coupling action of stress and pore water pressure. The apparent strain fields, deformation characteristics of the localization zone, and micromorphology of the fracture surface were analyzed. The results demonstrated that when the applied deviatoric stress level was above σ ci (crack initial stress) or σ cd (crack damage stress), the increase in pore water pressure promoted creep deformation evidently, improved the creep rate significantly and shortened the time-to-failure of the rock obviously. In the radial strain field, the localized development of substantial microcracks on the rock surface was concentrated in the steady-state creep, while the microcracks interconnected to form macroscopic shear cracks that dominated the accelerating creep, and this damage evolution characteristic can be used as a precursor and early warning of rock creep failure. Besides, increasing the pore water pressure also would cause the divergence point of strain curves inside and outside the localization zone to appear earlier at the secondary creep, and produce a wider localization zone at the tertiary creep. The creep fracture surface of the rock was dominated by intergranular microcracks. Increasing the pore water pressure would result in the deterioration of the cemented structure and breakage of the cemented matrix more seriously, thus stimulating the generation of more microcracks.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"48 24","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135819298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Blast response and damage assessment of reinforced concrete slabs using convolutional neural networks 基于卷积神经网络的钢筋混凝土板爆炸响应与损伤评估

2区工程技术

International Journal of Damage Mechanics Pub Date : 2023-10-26 DOI: 10.1177/10567895231204640

Bilal Ahmed, Taehyo Park, Jong-Su Jeon

{"title":"Blast response and damage assessment of reinforced concrete slabs using convolutional neural networks","authors":"Bilal Ahmed, Taehyo Park, Jong-Su Jeon","doi":"10.1177/10567895231204640","DOIUrl":"https://doi.org/10.1177/10567895231204640","url":null,"abstract":"Concrete structures are essential for shelters, storage, transportation, and defense systems. However, they are vulnerable to terrorist attacks and explosions. The most exposed component of these structures is the reinforced concrete slab, which is also the primary force-transferring member. Therefore, the present study utilizes machine learning techniques to predict the maximum vertical displacement of reinforced concrete slabs subjected to air-blast loading. This can be achieved using 11 input parameters of the slab and TNT blast to predict the maximum displacement. The dataset comprises 146 samples from various experimental and numerical blast studies on reinforced concrete slabs in the open literature. Rather than presenting the data in a tabular format, each individual data sample is transformed into an image using distinct techniques: one uses a self-similarity matrix, and the other utilizes an image generator for the tabular data. Image generation transforms tabular data into images by assigning features to pixel positions. This results in spatial dependency of the input features. Using these images, various convolutional neural networks were adopted (ResNet-18, ResNet-50, ResNet-101, EfficentNet-b0, ShuffleNet, Xception, DarkNet-53, and DenseNet-20) and trained to predict the slab maximum displacement. Most models demonstrated promising results. The performance of the models was predicted based on the root mean squared error, mean absolute error, and coefficient of determination, and the impact of input features on the maximum displacement was examined. Along with this, the initial study of the blast damage assessment on reinforced concrete slabs is explained for future work to be performed based on the proposed method.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134908175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel meso-damage constitutive model of rock under true triaxial stress with three-dimensional cracking strength, threshold and closure effect 考虑三维开裂强度、阈值和闭合效应的真三轴应力下岩石细观损伤本构模型

2区工程技术

International Journal of Damage Mechanics Pub Date : 2023-10-17 DOI: 10.1177/10567895231204631

Zhi Zheng, Jiaju Zhou, Junhong Li, Honghui Tao, Xiaofeng Han, Hongyu Xu, Qiang Zhang

{"title":"A novel meso-damage constitutive model of rock under true triaxial stress with three-dimensional cracking strength, threshold and closure effect","authors":"Zhi Zheng, Jiaju Zhou, Junhong Li, Honghui Tao, Xiaofeng Han, Hongyu Xu, Qiang Zhang","doi":"10.1177/10567895231204631","DOIUrl":"https://doi.org/10.1177/10567895231204631","url":null,"abstract":"Deep underground engineering is in a true three-dimensional stress state, and the adjustment of the three-dimensional stress state caused by engineering excavation will induce the fracture or even instability of the surrounding rock. However, three-dimensional mechanical model research suitable for the stability analysis of deep surrounding rock is very scarce. Therefore, a series of tests under different true triaxial stresses on two rocks (rhyodacite and marble) were conducted, and the characteristic strength (crack stable propagation initiation stress, crack unstable propagation initiation stress and peak strength) and deformation characteristics were further analyzed. After that, using the Lemaitre strain equivalence hypothesis and rock statistical damage theory, a new statistical damage constitutive model at true triaxial stress states was proposed, which introduced the three-dimensional strength criterion Modified Wiebols Cook to characterize the three-dimensional strength of the rock microelement. Therefore, the intermediate principal stress can be reasonably considered. The damage threshold, initial compaction effect and residual strength of the rock microelement at different true triaxial stress conditions were also considered. Then the relationships between the proposed model parameters and σ 2 and σ 3 were analyzed. Furthermore, sensitivity analysis of the influence of parameters m and F 0 in proposed model on the shape of rock stress–strain curve and peak strength was also investigated. The comparison between the results predicted by proposed model and the experimental data shows that the new model established in this study can well simulate the prepeak and postpeak deformation characteristics of rock and the intermediate principal stress effect under true triaxial stress conditions.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135993563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A coda wave interferometry to characterize and evaluate the powder debonding damage of solid propellant: Experimental investigation and discrete element simulation 用尾波干涉法表征和评价固体推进剂粉末脱粘损伤:实验研究与离散元模拟

2区工程技术

International Journal of Damage Mechanics Pub Date : 2023-09-15 DOI: 10.1177/10567895231199482

Yu Pan, Deze Yang, Wenzhong Qu, Xihua Chu

{"title":"A coda wave interferometry to characterize and evaluate the powder debonding damage of solid propellant: Experimental investigation and discrete element simulation","authors":"Yu Pan, Deze Yang, Wenzhong Qu, Xihua Chu","doi":"10.1177/10567895231199482","DOIUrl":"https://doi.org/10.1177/10567895231199482","url":null,"abstract":"The debonding of solid filler powder and binder matrix is the main form of damage for composite solid propellant. This study proposes a coda wave interference (CWI) analysis method to quantitatively characterize and evaluate the internal powder debonding damage of composite solid propellant by experiment and discrete element simulation. In order to verify the validity of numerical simulation, the discrete element method (DEM) samples to simulate the powder debonding damage of solid propellant are established, and the DEM simulation and micro-CT scanning experiment are carried out. The micro-experimental and DEM results prove the efficiency and accuracy of DEM samples in modeling the damage behaviors of solid propellant specimens. Furthermore, in order to quantitatively characterize and evaluate powder debonding damage of solid propellant, using CWI method to analyze the damage states of solid propellants in the experiment and DEM simulation of tension. Two coda evaluation parameters based on different damage states are proposed, and the relationship curves of coda evaluation parameters and tensile strain are obtained. Though the analysis of the curve results of experiment and DEM simulation, the validity of CWI is demonstrated. The coda evaluation parameters can quantitatively identify and judge the accumulation process of initial damage, the appearance of micro holes and the failure point of propellant.","PeriodicalId":13837,"journal":{"name":"International Journal of Damage Mechanics","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135396857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0