首页/文章/ 详情

【新文速递】2024年9月30日复合材料SCI期刊最新文章

20小时前浏览27

   

今日更新:Composite Structures 2 篇,Composites Part A: Applied Science and Manufacturing 1 篇

Composite Structures

A multi-objective optimization approach to design bistable collapsible tubular mast

Flavia Palmeri, Susanna Laurenzi

doi:10.1016/j.compstruct.2024.118593

双稳折叠式管状桅杆的多目标优化设计方法

The collapsible tubular mast (CTM) is a deployable structure made of two omega shaped shells, with each omega composed of three arc segments. In the bistable CTM (Bi-CTM), in addition to the strain energy well associated with the stable deployed state, another strain energy well can be found corresponding to the stable coiled state. The arcs’ geometries influence the existence of the second strain energy well and the associated stable coiled radius, responsible for the boom’s packaging efficiency. Besides packaging efficiency, factors like bending stiffness are also contingent on the geometries of the arcs, leading to significant trade-offs among these metrics. In this work, we propose a multi-objective optimization (MOO) to find optimal compromises that balance these conflicting requirements of a CTM. Particularly, a coupling analytical models and evolutionary algorithms (EA) technique is presented, utilizing and bench-marking various state-of-the-art EAs. The MOO approach gives as output the Pareto front, a set of the non-dominated design points, which showcases different trade-offs solutions tailorable for specific space-applications. Different design points are presented and discussed based on higher-level considerations.

可折叠管状桅杆(CTM)是一种可展开结构,由两个欧米茄形壳体组成,每个欧米茄由三个弧段组成。在双稳态CTM (Bi-CTM)中,除了与稳定展开状态相对应的应变能井外,还可以找到与稳定盘绕状态相对应的应变能井。弧的几何形状影响第二应变能井的存在和相关的稳定盘绕半径,这是悬臂的包装效率的关键。除了封装效率,弯曲刚度等因素也取决于弧线的几何形状,导致这些指标之间的重大权衡。在这项工作中,我们提出了一个多目标优化(MOO)来找到平衡CTM这些冲突要求的最佳妥协。特别地,提出了一种耦合分析模型和进化算法(EA)的技术,利用各种最先进的EA并对其进行基准测试。MOO方法将帕累托前沿作为输出,这是一组非主导设计点,展示了针对特定空间应用量身定制的不同权衡解决方案。基于更高层次的考虑,提出并讨论了不同的设计点。


Fatigue delamination damage analysis in composite materials through a rule of mixtures approach

Alireza Taherzadeh-Fard, Sergio Jiménez, Alejandro Cornejo, Eugenio Oñate, Lucia Gratiela Barbu

doi:10.1016/j.compstruct.2024.118613

基于混合规则的复合材料疲劳分层损伤分析

The present study investigates delamination damage initiation and propagation within a homogenization theory of mixtures, using the concept of virtual layers and virtual interfaces. It eliminates spatial discretization of layers, introducing a resultant damage variable to capture structure’s bulk response under both monotonic and cyclic loads. Fatigue-induced deterioration is classified into sub-critical, critical, and over-critical stages based on interfacial stresses. Calibration is conducted employing the widely-available Wöhler curves for each loading mode independently. An advance-in-time strategy is included in the model to enhance the simulation speed. The reliability of the approach is assessed for crack initiation and propagation separately through standard test coupons, showing good correlation with experimental data in mode I, mode II, and mixed-mode loading conditions. Depending on the calibration procedure adopted, the model is applicable to a wide range of stress ratios. In addition, it could be integrated into any standard finite element framework using the desired number of elements through the thickness regardless of the physical amount of layers. This allows easy modification of stacking sequences or the number of layers within the constitutive law without mesh structure changes, facilitating simulation of large-scale composite laminates with minimal accuracy loss and reduced computational costs.

本研究利用虚拟层和虚拟界面的概念,在混合均匀化理论中研究分层损伤的产生和扩展。它消除了层的空间离散化,引入了一个综合损伤变量来捕捉结构在单调和循环荷载下的整体响应。根据界面应力,疲劳诱发劣化分为亚临界、临界和过临界阶段。校准是采用广泛可用的Wöhler曲线为每个加载模式独立进行的。模型中引入了超前策略,提高了仿真速度。通过标准试样分别对裂纹萌生和扩展进行了可靠性评估,在ⅰ型、ⅱ型和混合模态加载条件下,该方法与试验数据具有良好的相关性。根据所采用的校正程序,该模型适用于各种应力比。此外,它可以集成到任何标准的有限元框架中,使用所需的元素数量通过厚度,而不考虑层的物理量。这使得在不改变网格结构的情况下,可以轻松修改堆叠序列或本构律内的层数,从而以最小的精度损失和降低的计算成本促进大规模复合材料层压板的模拟。


Composites Part A: Applied Science and Manufacturing

Multiscale modelling of CFRP composites exposed to thermo-mechanical loading from fire

Lei Wan, Scott L.J. Millen

doi:10.1016/j.compositesa.2024.108481

火灾热机械载荷下CFRP复合材料的多尺度建模

Carbon fibre reinforced polymers (CFRP) are prone to structural damage during extreme events such as fire. Typically, modelling the effect of fire on CFRP structures is carried out through mesoscale analysis to predict overall structural performance. In this study, Finite Element (FE) modelling has been conducted to investigate the effects of fire on CFRP specimens at both meso- and micro-scales. The mesoscale analysis informs the microscale analysis to examine the effects of fire on each constituent of the material. A comparison of thermal analysis at the meso- and micro-scales reveals less than a 6% difference in the predicted node temperature. For the first time, fire-induced progressive failure analysis has been conducted on the fibres, matrix, and fibre/matrix interface of representative plies within the composite laminates. Fibre breakage, matrix cracking, and interface debonding were accurately captured using representative volume element (RVE) models under thermo-mechanical loading, showing qualitatively excellent agreement with experimental data.

碳纤维增强聚合物(CFRP)在火灾等极端事件中容易造成结构损坏。通常,模拟火灾对CFRP结构的影响是通过中尺度分析来预测整体结构性能的。在这项研究中,有限元(FE)模型已经进行了研究火灾对CFRP试样在中观和微观尺度的影响。中尺度分析通知微观尺度分析,以检查火对材料的每个组成部分的影响。中尺度和微观尺度的热分析比较表明,预测节点温度的差异不到6%。首次对复合材料层合板中具有代表性层的纤维、基体和纤维/基体界面进行了火致渐进破坏分析。采用代表性体积元(RVE)模型准确捕捉了热机械载荷下纤维断裂、基体开裂和界面剥离,与实验数据在质量上非常吻合。



来源:复合材料力学仿真Composites FEM
ACTMechanical疲劳断裂复合材料ADSUGUM裂纹理论材料多尺度试验
著作权归作者所有,欢迎分享,未经许可,不得转载
首次发布时间:2024-11-27
最近编辑:20小时前
Tansu
签名征集中
获赞 5粉丝 0文章 776课程 0
点赞
收藏
作者推荐

【新文速递】2024年10月11日复合材料SCI期刊最新文章

今日更新:Composite Structures 1 篇,Composites Part A: Applied Science and Manufacturing 1 篇,Composites Part B: Engineering 1 篇,Composites Science and Technology 1 篇Composite StructuresQuantum computing with error mitigation for data-driven computational homogenizationZengtao Kuang, Yongchun Xu, Qun Huang, Jie Yang, Chafik El Kihal, Heng Hudoi:10.1016/j.compstruct.2024.118625基于数据驱动计算均匀化的误差缓解量子计算As a crossover frontier of physics and mechanics, quantum computing is showing its great potential in computational mechanics. However, quantum hardware noise remains a critical barrier to achieving accurate simulation results due to the limitation of the current hardware. In this paper, we integrate error-mitigated quantum computing in data-driven computational homogenization, where the zero-noise extrapolation (ZNE) technique is employed to improve the reliability of quantum computing. Specifically, ZNE is utilized to mitigate the quantum hardware noise in two quantum algorithms for distance calculation, namely a Swap-based algorithm and an H-based algorithm, thereby improving the overall accuracy of data-driven computational homogenization. Multiscale simulations of a 2D composite L-shaped beam and a 3D composite cylindrical shell are conducted with the quantum computer simulator Qiskit, and the results validate the effectiveness of the proposed method. We believe this work presents a promising step towards using quantum computing in computational mechanics.量子计算作为物理学和力学的交叉前沿,在计算力学中显示出巨大的潜力。然而,由于现有硬件的限制,量子硬件噪声仍然是实现精确仿真结果的关键障碍。在本文中,我们将误差缓解量子计算集成到数据驱动的计算均匀化中,其中使用零噪声外推(ZNE)技术来提高量子计算的可靠性。具体来说,在基于swap的距离计算算法和基于h的距离计算算法中,利用ZNE来减轻量子硬件噪声,从而提高数据驱动计算均匀化的整体精度。利用量子计算机模拟器Qiskit对二维复合材料l型梁和三维复合材料圆柱壳进行了多尺度模拟,结果验证了所提方法的有效性。我们相信这项工作为在计算力学中使用量子计算迈出了有希望的一步。Composites Part A: Applied Science and ManufacturingHigh deformation/damage localization accuracy of fibrous composites through deep-learning of single channel data from carbon nanotube sensorsXiaowei Jiang, Wenjin Zhang, Xiaodong Wang, Ling Liudoi:10.1016/j.compositesa.2024.108512基于碳纳米管传感器单通道数据深度学习的纤维复合材料高变形/损伤定位精度A convolutional neural network (CNN) model by deep-learning single channel data from a serpentine carbon nanotube sensor (S-CNT) with gradient distributed CNTs is proposed for locating deformation/damage in carbon fiber reinforced plastic (CFRP). The real-time resistance-time data caused by bending deformation of CFRP embedded with S-CNT are encoded into more discriminative 2D images for training the CNN. The results show that an accurate deformation localization within 1.5 mm for the trained positions can be obtained. Moreover, static-indentation loading reveals that the CNN model also has high localization accuracy for new deformation/damage locations in CFRP, with an error of less than 5.5 mm.提出了一种基于深度学习梯度分布的蛇形碳纳米管传感器(S-CNT)单通道数据的卷积神经网络(CNN)模型,用于碳纤维增强塑料(CFRP)的变形/损伤定位。将嵌入S-CNT的CFRP弯曲变形引起的实时电阻时间数据编码为更具判别性的二维图像,用于训练CNN。结果表明,对训练位置的变形定位精度在1.5 mm以内。此外,静态压痕加载表明,CNN模型对CFRP中新的变形/损伤位置也具有较高的定位精度,误差小于5.5 mm。Composites Part B: EngineeringGenome engineering of materials based on Ce doping, high-performance electromagnetic wave absorber for marine environmentLvtong Duan, Jintang Zhou, Jiaqi Tao, Yijie Liu, Yi Yan, Yucheng Wang, Xiaoli Yang, Xuewei Tao, Zhengjun Yao, Hexia Huang, Peijiang Liu, Yao Madoi:10.1016/j.compositesb.2024.111882 基于Ce掺杂材料的基因组工程,海洋环境高性能电磁波吸收剂Traditional microwave absorbing materials (MAM) are difficult to meet the current increasingly complex electromagnetic environment, MAM began to functionally integrated development to meet the needs of diversified applications. For the high humidity and high salt spray environment of the ocean, the development of electromagnetic absorber integrating microwave absorption (MA) and corrosion protection functions is imminent. In this work, high-quality genes were screened through materials genome engineering, and in-situ doping strategies of Ce gene were designed to synergistically enhance MA properties using composition modulation and structure modulation, the effective absorption bandwidth (EAB) of composite material WC@FCC1 can reach 5.62GHz at an ultra-thin thickness of 1.66mm. Thanks to the unique 4f orbital mechanism of Ce element, CeO2 is endowed with excellent redox property, forming an oxide protective film on the surface, which prevents the entry of external corrosive media. The excellent corrosion protection performance of the composite material has been verified through electrochemical testing and molecular dynamics simulation. This work provides new design ideas for high-performance MAM, as well as new strategies and insights for functionally integrated electromagnetic absorber.传统的吸波材料(MAM)难以满足当前日益复杂的电磁环境,MAM开始向功能集成化发展,以满足多样化的应用需求。针对海洋的高湿、高盐雾环境,开发集微波吸收和防腐功能于一体的电磁吸收器迫在眉睫。本工作通过材料基因组工程筛选优质基因,设计Ce基因原位掺杂策略,通过成分调制和结构调制协同增强MA性能,复合材料WC@FCC1在1.66mm超薄厚度下的有效吸收带宽(EAB)可达5.62GHz。由于Ce元素独特的4f轨道机制,CeO2具有优异的氧化还原性能,在表面形成氧化保护膜,阻止外界腐蚀介质的进入。通过电化学测试和分子动力学模拟验证了复合材料优异的防腐性能。这项工作为高性能MAM提供了新的设计思路,也为功能集成电磁吸收器提供了新的策略和见解。Composites Science and TechnologyThermal reaction based mesoscale ablation model for phase degradation and pyrolysis of needle-punched compositeYu Chen, Ran Tao, Yiqi Maodoi:10.1016/j.compscitech.2024.110898 基于热反应的针 刺复合材料相降解热解中尺度烧蚀模型Needle-punched composites are highly valued for their exceptional resistance to interlaminar properties, ablation, and design flexibility, making them increasingly popular in aerospace thermal protection systems. This work investigates the mesoscale structural characteristics and thermophysical properties of needle-punched composites in ablation process. Oxyacetylene ablation experiments were carried out at different temperatures, and a mesoscopic needle-punched structure model was established based on the results of CT characterization. Further, Abaqus custom subroutine was used to reveal the ablation evolution mechanism of carbon fiber reinforced phenolic resin-based needle-punched composites. The results show that, at mesoscopic scale, the acicular fiber bundle perpendicular to the ablative surface accelerates the heat conduction to the interior of the material and promotes the thermal damage and performance degradation of the composite.针 刺复合材料因其优异的抗层间特性、烧蚀和设计灵活性而受到高度重视,使其在航空航天热防护系统中越来越受欢迎。本文研究了针 刺复合材料在烧蚀过程中的中尺度结构特征和热物理性能。在不同温度下进行氧乙炔烧蚀实验,并根据CT表征结果建立了介观针 刺结构模型。利用Abaqus定制子程序分析了碳纤维增强酚醛树脂基针 刺复合材料的烧蚀演化机理。结果表明:在细观尺度上,垂直于烧蚀表面的针状纤维束加速了材料内部的热传导,促进了复合材料的热损伤和性能退化;来源:复合材料力学仿真Composites FEM

未登录
还没有评论
课程
培训
服务
行家
VIP会员 学习 福利任务 兑换礼品
下载APP
联系我们
帮助与反馈