【新文速递】2023年12月26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 Science and Technology 1 篇Composite StructuresElastoplastic mechanical behavior of high-field magnet of REBCO high temperature superconducting composite tape under extreme environmentWenhai Zhou., Rongli Jia, Jiafeng Cao, Rui Liangdoi:10.1016/j.compstruct.2023.117806REBCO高温超导复合带高场磁体在极端环境下的弹塑性力学行为Rare Earth-Barium-Copper-Oxide (REBCO) high temperature superconducting (HTS) coated conductors (CCs) are one of the best candidate materials for high-field magnets. However, due to its laminated structure, each component materials of the CCs are inevitably subjected to residual thermal stress and electromagnetic force during heat treatment, processing, cooling, coil winding, and operation of the magnet structure. It causes changes in its superconducting properties, and even leads to irreversible degradation of superconducting critical characteristics, brittle layer fracture and peeling delamination within the coil. To reveal the synthesis of the tape and the stress state of the high-field coil under multi-physical fields. The residual thermal stress/strain accumulation of each component material of the tape is investigated under two thermal processing and manufacturing methods by combining analytical theory with numerical calculation. In which, the two thermal processing methods are metal-organic chemical vapor deposition (MOCVD) process and one-step cooling simplified process respectively. The results show that the residual thermal stresses accumulated by five materials, Hastelloy, Buffer, REBCO, Ag and Cu, under the step-by-step synthesis process are about 14.7%, 97.3%, 96.3%, 80% and 49.2% of the simplified model, respectively. And the residual thermal strains are about 15.1%, 96.8%, 95.2%, 85.2% and 27.5% of the simplified model. In addition, after the five materials are manufactured according to the step-by-step thermal processing process, the accumulated residual thermal stresses are about 1.88%, 86.3%, 61%, 114.3%, and 34% of their respective yield strengths, respectively. The elastoplastic mechanical behavior of the magnet under the background of high magnetic field and strong current is also studied. The results indicate that the maximum values of effective and hoop stresses in each component material of the coil are distributed in the innermost side of the magnet, and decrease gradually along the radial direction of the magnet. In the innermost coil of the magnet, the effective stress of each component material increases with the increase of the transmission current. When the transmission current Iope = 183 A, the material Cu reaches the yield strength and enters the plastic deformation stage. Whereas the material Hastelloy reaches the yield strength and enters into the plastic deformation stage when the transmission current Iope = 222 A.稀土-钡-铜-氧化物（REBCO）高温超导（HTS）涂层导体（CC）是高场磁体的最佳候选材料之一。然而，由于其层状结构，在磁体结构的热处理、加工、冷却、线圈绕制和运行过程中，CC 的各组成材料不可避免地会受到残余热应力和电磁力的影响。这导致其超导特性发生变化，甚至导致超导临界特性的不可逆退化、脆性层断裂和线圈内的剥离分层。揭示多物理场下胶带的合成和高场线圈的应力状态。通过分析理论与数值计算相结合的方法，研究了两种热加工和制造方法下磁带各组成材料的残余热应力/应变累积。其中，两种热加工方法分别为金属有机化学气相沉积（MOCVD）工艺和一步冷却简化工艺。结果表明，在分步合成工艺下，哈氏合金、缓冲材料、REBCO、Ag 和 Cu 五种材料累积的残余热应力分别约为简化模型的 14.7%、97.3%、96.3%、80% 和 49.2%。而残余热应变约为简化模型的 15.1%、96.8%、95.2%、85.2% 和 27.5%。此外，这五种材料按照分步热加工工艺制造后，累积残余热应力分别约为各自屈服强度的 1.88%、86.3%、61%、114.3% 和 34%。此外，还研究了高磁场和强电流背景下磁体的弹塑性机械行为。结果表明，线圈各组成材料的有效应力和箍应力的最大值分布在磁体的最内侧，并沿磁体的径向逐渐减小。在磁体最内侧的线圈中，各组成材料的有效应力随着传输电流的增加而增加。当传输电流 Iope = 183 A 时，铜材料达到屈服强度，进入塑性变形阶段。而当传输电流 Iope = 222 A 时，哈氏合金材料达到屈服强度并进入塑性变形阶段。Composites Part A: Applied Science and ManufacturingManufacturing feasibility of a bend free ellipsoidal composite pressure vessel using automated fibre placementAlexander Air, B. Gangadhara Prustydoi:10.1016/j.compositesa.2023.107968 自动铺放纤维制造无弯曲椭球面复合材料压力容器的可行性Composite pressure vessels are attracting high research interest for their low weight and remarkable structural performance. Suppressing bending in pressure vessels offers increased pressure capacity by enabling the efficient membrane stress state. Variable angle tow laminates (VAT) have been shown theoretically to achieve this stress state in composite ellipsoids. This paper presents steps towards manufacturing such vessels using automated fibre placement (AFP). It was found that the bend free design is suited to tanks with diameters greater than ≈1400mm when considering the VAT limitations of typical AFP equipment. When compared to a perfect ellipsoid, the addition of a polar boss reduced the portion of the tank satisfying the bend free criteria by 29.6%, but also reduced deformation by 28.9%. The layup considering overlaps was optimised, and manufacturing simulation and coupon manufacturing trials were used to verify thickness and steering radius predictions and visualise defect formation.复合材料压力容器以其重量轻、结构性能好等优点引起了人们的广泛关注。抑制压力容器中的弯曲通过实现有效的膜应力状态来增加压力容量。变角拖曳层合板(VAT)在理论上可以实现复合椭球体的这种应力状态。本文介绍了使用自动纤维放置(AFP)制造这种容器的步骤。考虑到典型AFP设备的VAT限制，发现无弯曲设计适用于直径大于≈1400mm的储罐。与完美椭球体相比，增加极凸台使水箱满足无弯曲标准的部分减少了29.6%，但也减少了28.9%的变形。对考虑重叠的铺层进行了优化，并通过制造仿真和联片制造试验来验证厚度和转向半径预测，并可视化缺陷形成。Composites Science and Technology1 experimental and numerical evaluation of residual mechanical performance of carbon/epoxy laminated coupons after integration of solid battery cells for aeronautical applicationsFrédéric Laurin, Anne Mavel, Florence Saffar, Alexander Beutl, Helmut Kühneltdoi:10.1016/j.compscitech.2023.110384 航空固体电池集成后碳/环氧复合材料残余力学性能的实验与数值评价The present study deals with a numerical and experimental evaluation of the residual mechanical performance of a quasi-isotropic carbon/epoxy laminated composite plate in which solid battery cells have been integrated. Firstly, the mechanical properties of the multifunctional Reinforced Multilayer Stack (RMS) battery cells have been determined thanks to dedicated multi-instrumented tests, while those of the AS4/8552 composite material have been extracted from the literature and validated by comparisons with tensile tests on plates without battery, considered as a reference case. Then, on the basis of the recommendations obtained from a virtual test campaign using FE simulations, a 16-ply laminated composite plate containing 6 solid battery cells was manufactured with a modified curing cycle that preserves the electrical properties of the batteries while ensuring the mechanical properties of the composite material. Various control methods, such as CT-scan and optical analysis, were used to demonstrate the promising quality of the manufactured composite coupon with embedded cells. Finally, a mechanical tensile test was carried out to experimentally determine the reduction in mechanical properties. The analysis of such a test with non-linear FE simulation has allowed a better understanding of the damage and failure process when solid battery cells are integrated into high performance laminated composite structures designed for the aeronautical industry.本文对固体电池单元集成的准各向同性碳/环氧层合复合材料板的残余力学性能进行了数值和实验评价。首先，通过专用的多仪器测试确定了多功能增强多层堆叠(RMS)电池单元的力学性能，同时从文献中提取了AS4/8552复合材料的力学性能，并通过与不带电池的板的拉伸试验进行比较来验证，作为参考案例。然后，在使用FE模拟的虚拟测试活动中获得的建议的基础上，采用改进的固化周期制造了包含6个固体电池单元的16层复合材料层压板，在保证复合材料的机械性能的同时保留了电池的电学性能。各种控制方法，如ct扫描和光学分析，被用来证明具有包埋细胞的复合材料的良好质量。最后，进行了力学拉伸试验，以实验确定力学性能的降低。通过非线性有限元模拟对这种测试进行分析，可以更好地了解固体电池单元集成到航空工业设计的高性能层压复合材料结构中时的损伤和失效过程。来源：复合材料力学仿真Composites FEM