【新文速递】2023年10月22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 2 篇，Composites Part B: Engineering 2 篇，Composites Science and Technology 3 篇

Composite Structures

A topology optimization framework for 3D Phononic Crystals via the method of successive iteration of analysis and design

Zhu Yixiao, Kang Zhan

doi:10.1016/j.compstruct.2023.117641

通过分析和设计的连续迭代法实现三维声晶的拓扑优化框架

Topology optimization has become a useful tool for designing Phononic Crystals (PnCs) to achieve desired elastic wave propagation properties. However, topological design of three-dimensional (3D) PnCs remains a significant challenge due to extremely high computational cost required for the repeated solution of the nested double-loop problem of design optimization and eigenvalue analysis to determine the band structure during the optimization iteration process. This paper presents a more efficient topology optimization method based on the concept of successive iteration of analysis and design. The method employs a sequential approximation of the eigenpairs through an inverse iteration-like procedure to avoid solving the expensive eigenvalue problems in each design iteration. To further improve the efficiency of the design iteration, the eigenmodes of the intermediate PnCs designs are first computed on a relatively coarse finite element mesh. Then they are mapped onto the fine mesh and used as the initial trial eigenmodes in the eigenpair analysis and design sensitivity analysis. The high efficiency of the proposed method, as compared with conventional nested double-loop optimization approaches, is demonstrated by 3D numerical examples with over one million degrees of freedom. It is shown that this approach can achieve simultaneous convergence of the eigenvectors along with the design evolution of the unit cell, therefore substantially reduces the computational burden for high-resolution topological design of 3D PnCs.

拓扑优化已成为设计声波晶体（PnCs）以实现理想弹性波传播特性的有用工具。然而，由于在优化迭代过程中需要重复解决设计优化和特征值分析的嵌套双环问题以确定带状结构，计算成本极高，因此三维（3D）PnC 的拓扑设计仍然是一项重大挑战。本文提出了一种基于分析和设计连续迭代概念的更高效拓扑优化方法。该方法通过类似反迭代的程序对特征对进行顺序逼近，以避免在每次设计迭代中求解昂贵的特征值问题。为进一步提高设计迭代的效率，首先在相对较粗的有限元网格上计算中间 PnCs 设计的特征模。然后将它们映射到精细网格上，并在特征对分析和设计敏感性分析中用作初始试验特征模型。与传统的嵌套双环优化方法相比，所提出的方法具有很高的效率，超过一百万自由度的三维数值实例证明了这一点。结果表明，这种方法可以实现特征向量与单元设计演化的同步收敛，因此大大减轻了三维 PnC 高分辨率拓扑设计的计算负担。

Composites Part A: Applied Science and Manufacturing

Construction of alternating multilayer films with stable absorption-dominated electromagnetic shielding performance and reinforced mechanical properties via interface engineering

Wang Lingling, Wei Renbo, luo Yu, Liu Chenchen, Liu Xiaobo, Li Dong

doi:10.1016/j.compositesa.2023.107862

 

通过界面工程构建具有稳定吸收为主的电磁屏蔽性能和强化机械性能的交替多层膜

As an ideal material to lessen electromagnetic pollution, absorption-dominated electromagnetic interference (EMI) shielding composites still face the problems of complicated structure design and insufficient performance stability. Herein, an alternating multilayer film with stable absorption-dominated EMI shielding effectiveness (SE) and reinforced mechanical properties is fabricated by constructing hydrogen bonding between multilayers interface. When the layers increase to 4, benefiting from the construction of multilayer structure and the stronger interaction, the reflective shielding effectiveness decrease to 2.9 dB, the absorption coefficient of multilayer film increases from 0.13 to 0.52, the retention rate of EMI SE increases from 1.0 % to 97.6 % after bending 1000 cycles, and the tensile strength is enhanced from 5.7 MPa to 27.3 MPa. The calculated binding energies and the experimental results show that the interaction between Pluronic F127 anchored on the porous film and cellulose nanofibers entangled on the carbon nanotubes layer increases the interlayer interaction force and durability of EMI SE.

作为减少电磁污染的理想材料，以吸收为主的电磁干扰（EMI）屏蔽复合材料仍然面临着结构设计复杂、性能不够稳定等问题。本文通过在多层膜界面之间构建氢键，制备了一种具有稳定的吸收主导型电磁干扰屏蔽效能（SE）和增强机械性能的交替多层膜。当层数增加到 4 层时，得益于多层结构的构建和更强的相互作用，反射屏蔽效果降低到 2.9 dB，多层薄膜的吸收系数从 0.13 增加到 0.52，弯曲 1000 次后 EMI SE 的保持率从 1.0 % 增加到 97.6 %，拉伸强度从 5.7 MPa 提高到 27.3 MPa。计算得出的结合能和实验结果表明，锚定在多孔薄膜上的 Pluronic F127 与缠结在碳纳米管层上的纤维素纳米纤维之间的相互作用增加了层间相互作用力，提高了 EMI SE 的耐久性。

An inverse method for curing process-induced eigenstrain reconstruction of laminated composites

Zhang Zaoxu, Zhao Xueying, Ji Qingxiang, Zhang Jiawei, Xu Fuquan, Wang Changguo

doi:10.1016/j.compositesa.2023.107863

 

层状复合材料固化过程诱导特征应变重建的反演方法

Accurate acquisition of the curing process-induced eigenstrain distribution is vital for predicting residual stress of laminated composites. In this work we develop a novel inverse method for full-field PIE reconstruction of laminated composites. We design standard laminates to obtain the PIE of unidirectional and woven lamina which are key ingredients of full-field PIE. Then an inverse model is established to accurately calculate lamina’s PIE from the measured residual middle-plane strain and curvature of standard laminates. Full-field PIE of validation laminates are then reconstructed by the obtained lamina’s PIE. Experimental results are in good agreement with the reconstructed results, verifying the accuracy and effectiveness of our proposed method. Finally, we implement the inverse method in accurately reconstructing full-field PIE of a hybrid laminated composite I-beam. We also observe that the PIE is process dependent, indicating that PIE can be used to evaluate the effect of curing process on residual stress.

准确获取固化过程引起的特征应变分布对于预测层状复合材料的残余应力至关重要。在这项工作中，我们开发了一种用于层状复合材料全场 PIE 重建的新型逆方法。我们设计了标准层压板，以获得单向层压板和编织层压板的 PIE，这是全场 PIE 的关键要素。然后建立一个逆模型，根据测量到的标准层压板残余中间平面应变和曲率精确计算层压板的 PIE。然后根据所获得的层压板 PIE 重建验证层压板的全场 PIE。实验结果与重建结果十分吻合，验证了我们提出的方法的准确性和有效性。最后，我们采用反演方法精确地重建了混合层压复合材料工字梁的全场 PIE。我们还观察到 PIE 与工艺相关，这表明 PIE 可用于评估固化工艺对残余应力的影响。

Composites Part B: Engineering

Significant improvement of the room and cryogenic mechanical properties of an AlN particle reinforced Al matrix composite by alloying element magnesium

Sun Xinda, Fan Yong, Nie Jinfeng, Chen Yuyao, Xie Kewei, Liu Sida, Zhao Yoghao, Liu Xiangfa

doi:10.1016/j.compositesb.2023.111056

通过添加镁合金元素显著改善氮化铝颗粒增强铝基复合材料的室温和低温力学性能

Nowadays, the mechanical properties of aluminum alloys have been studied extensively, but the study of aluminum matrix composites (AMCs) at extreme temperatures, particularly at cryogenic temperatures, is rare. In this work, an AlNp reinforced AMCs with excellent room and cryogenic temperature mechanical properties was manufactured by adding magnesium, and the corresponding microstructure evolution and strengthening mechanisms were systematically investigated. There are two kinds of particles in AlNp/Al, the small AlNp and the large AlB2p. With the Mg content increased, the AlNp became more dispersed and the AlB2p transformed into AlMgB4p. In addition, Mg atoms also dissolved in the matrix, which played a positive role in improving the mechanical properties. The ultimate tensile strength of the composites at RT was increased to 317 MPa, 419 MPa, and 485 MPa from 251 MPa after adding 1, 3, and 5 wt% Mg respectively. The cryogenic strength was further increased to 519 MPa, 592 MPa, and 611 MPa from 469 MPa, while keeping a decent ductility of about 5.6%, which was due to the more uniform microstructure avoiding crack generation.

目前，人们对铝合金的力学性能进行了广泛的研究，但对铝基复合材料（AMC）在极端温度，尤其是低温下的力学性能的研究却很少见。本研究通过添加镁制备了具有优异室温和低温力学性能的 AlNp 增强 AMC，并系统研究了其相应的微观结构演变和强化机理。AlNp/Al 中存在两种颗粒，即小颗粒 AlNp 和大颗粒 AlB2p。随着镁含量的增加，AlNp 变得更加分散，AlB2p 转变为 AlMgB4p。此外，镁原子也溶解在基体中，这对改善力学性能起到了积极作用。添加 1、3 和 5 wt% 的镁后，复合材料在 RT 时的极限拉伸强度分别从 251 MPa 提高到 317 MPa、419 MPa 和 485 MPa。低温强度从 469 兆帕进一步提高到 519 兆帕、592 兆帕和 611 兆帕，同时保持了约 5.6% 的良好延展性，这是由于微观结构更加均匀，避免了裂纹的产生。

Synergistically enhancing weavability and interface behavior by applying PDMS/MXene on carbon fiber surface through ultrasound assistance

Sun Zhaoling, Zheng Baoping, Chen Chaoyu, Dong Zhijia, Ma Pibo

doi:10.1016/j.compositesb.2023.111071

通过超声波辅助将 PDMS/MXene 应用于碳纤维表面，协同增强可织造性和界面行为

The poor interfacial properties and weavability of carbon fiber reinforced polymer (CFRP) composites stem from the surface chemical inertness and low wear resistance of carbon fiber (CF). Herein, we developed an effective approach to fabricate the CF@Polydimethylsiloxane/MXene (CF@PDMS/MXene) using ultrasound-assisted techniques, to improve both wear resistance and interfacial properties. The effectiveness of the modified treatment was assessed by Fourier transform infrared spectroscopy (FT-IR), microscopic confocal laser Raman spectrometer (Raman), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). The success of the graft was evaluated using field emission scanning electron microscopes (FE-SEM) and energy dispersive spectrometry (EDS). The interfacial shear strength (IFSS) of the composite was evaluated through fiber pull-out experiments. Different weight ratios of MXene nanoparticles were employed during the grafting process to investigate their impact on surface morphology, wear resistance, and interfacial properties. The results demonstrated that CF@PDMS/MXene-1.5 wt% exhibited a residual fracture tensile strength 14.8 % higher than desized CF when the MXene concentration was increased to 1.5wt%. Additionally, the IFSS of CF@PDMS/MXene-1.5 wt% was observed to be 113 % greater than desized CF. Consequently, this novel modification strategy holds great promise for enhancing the mechanical performance of CFRP composites.

碳纤维增强聚合物（CFRP）复合材料的界面性能和可织造性差源于碳纤维（CF）的表面化学惰性和低耐磨性。在此，我们开发了一种利用超声辅助技术制造 CF@聚二甲基硅氧烷/MXene（CF@PDMS/MXene）的有效方法，以改善其耐磨性和界面性能。傅立叶变换红外光谱（FT-IR）、显微共焦激光拉曼光谱仪（Raman）、X 射线光电子能谱（XPS）和热重分析（TGA）对改性处理的效果进行了评估。使用场发射扫描电子显微镜（FE-SEM）和能量色散光谱仪（EDS）评估了接枝的成功率。通过纤维拉出实验评估了复合材料的界面剪切强度（IFSS）。在接枝过程中采用了不同重量比的 MXene 纳米粒子，以研究它们对表面形貌、耐磨性和界面性能的影响。结果表明，当 MXene 的浓度增加到 1.5wt% 时，CF@PDMS/MXene-1.5 wt% 的残余断裂拉伸强度比脱盐 CF 高 14.8%。此外，还观察到 CF@PDMS/MXene-1.5 wt% 的 IFSS 比去甲基化 CF 高 113%。因此，这种新型改性策略有望提高 CFRP 复合材料的机械性能。

Composites Science and Technology

Lightweight and recyclable hybrid multifunctional foam based cellulose fibers with excellent flame retardant, thermal, and acoustic insulation property

Liao Jianming, Hou Yansu, Li Jun, Zhang Min, Dong Yunyuan, Chen Xiaobin

doi:10.1016/j.compscitech.2023.110315

 

基于纤维素纤维的轻质可回收混合多功能泡沫，具有优异的阻燃、隔热和隔音性能

The development of eco-friendly and good-performance foam materials is essential for the environment and energy saving. Conventional inorganic and organic foams suffer from brittleness and contamination problems. Here, we report a facile and scalable hybrid strategy to prepare shape-stable cellulose-based multifunctional foam via physical cross-linking of PVA and stabilization of HGMs. The prepared foam exhibits ultra-low density (27.0 mg/cm3), enhanced flame-retardant performance (the PHRR decreased from 161.8 to 89.1 kW/m2, LOI value up to 26.2%), low thermal conductivity (48.2 mW/mK), good acoustic insulation property (NRC of 0.41), and good mechanical properties (with specific compressive modulus of 15.3 MPa cm3/g). Moreover, the foam can be recycled under simplified procedures. Our approach provides a novel alternative to the manufacture of low-cost, eco-friendly, and scalable foam materials. This multifunctional lightweight material is highly sought after for modern engineering construction applications.

为了保护环境和节约能源，开发环保型高性能泡沫材料至关重要。传统的无机和有机泡沫材料存在脆性和污染问题。在此，我们报告了一种通过物理交联 PVA 和稳定 HGMs 来制备形状稳定的纤维素基多功能泡沫的简便且可扩展的混合策略。制备的泡沫具有超低密度（27.0 mg/cm3）、更强的阻燃性能（PHRR 从 161.8 kW/m2 降至 89.1 kW/m2，LOI 值高达 26.2%）、低导热率（48.2 mW/mK）、良好的隔音性能（NRC 为 0.41）和良好的机械性能（比压缩模量为 15.3 MPa cm3/g）。此外，这种泡沫还可以通过简化程序进行回收。我们的方法为制造低成本、环保和可扩展的泡沫材料提供了一种新的选择。这种多功能轻质材料在现代工程建筑应用中备受青睐。

Synthesis of fractal crystallized organic microspheres together with constructing full covalent bonding at the interface to strengthen and toughen aramid fiber composites

Fan Chunlin, Lyu Junwei, Li Zheng, Luo Longbo, Liu Xiangyang

doi:10.1016/j.compscitech.2023.110313

 

合成分形结晶有机微球并在界面上构建全共价键以增强和韧化芳纶纤维复合材料

Regulating the interface to simultaneously enhance the strength and toughness of aramid fiber composites remains a great challenge. Herein, a resilient, full covalent interface was constructed by introducing fractal crystallized organic microspheres into the interface of aramid fiber composites using the twice fluorination approach. Firstly, the aromatic polyamide with ether bonds was synthesized, and the fractal crystallized microspheres with a porous surface containing amino groups were prepared by thermally induced solution self-assembly. Subsequently, the twice fluorination method introduces C–F bonds to the surfaces of both fibers and microspheres, respectively. Then, the covalent bonds among fibers, microsphere, and resin were formed by the derivative reaction of C–F bonds. This interface boosts the interlaminar shear strength (ILSS) of composites by 100.5% to 36.7 MPa and the unnotched impact toughness of composites by 13.5%–1363 kJ/m2. Comparative analyses reveal the full covalent interface and the fractal structure of microspheres contribute 47.8% and 52.2% to the ILSS enhancement, respectively. In addition, the fractal structure of microspheres is the only factor for increased toughness. Finite element analysis reveals that the fractal crystallized microspheres combined with full covalent interface facilitate elastic stress transfer within the composites to enhance the performance of composites.

调节界面以同时提高芳纶纤维复合材料的强度和韧性仍然是一项巨大的挑战。在此，我们采用两次氟化法，在芳纶纤维复合材料的界面中引入分形结晶有机微球，从而构建了一种具有弹性的全共价界面。首先合成具有醚键的芳香族聚酰胺，并通过热诱导溶液自组装制备出表面多孔且含有氨基的分形结晶微球。随后，通过两次氟化法分别在纤维和微球表面引入 C-F 键。然后，纤维、微球和树脂之间通过 C-F 键的衍生反应形成共价键。这种界面使复合材料的层间剪切强度（ILSS）提高了 100.5% 至 36.7 MPa，使复合材料的无缺口冲击韧性提高了 13.5% 至 1363 kJ/m2。对比分析表明，全共价界面和微球的分形结构对提高 ILSS 的贡献率分别为 47.8% 和 52.2%。此外，微球的分形结构是提高韧性的唯一因素。有限元分析表明，分形结晶微球与全共价界面相结合，促进了复合材料内部的弹性应力传递，从而提高了复合材料的性能。

Enhancing fracture toughness of polydimethylsiloxane with cyclosiloxane hybrid polymer microspheres

Tao Yuan, Mei Shuxing, Yi Haokun, Pan Xuansheng, Zhang Rong, Li Zhuo

doi:10.1016/j.compscitech.2023.110314

 

用环硅氧烷杂化聚合物微球增强聚二甲基硅氧烷的断裂韧性

Polydimethylsiloxane (PDMS) offers many unique advantages, but the poor fracture toughness (300–500 J/m2) limits its applications. Conventional methods of toughening PDMS through chain modification or inorganic fillers may negatively impact other properties, such as increase in hysteresis, stiffness, or viscosity. To address this problem, we introduce organic cyclosiloxane hybrid polymer (CHP) microspheres to toughen PDMS. These microspheres are synthesized by emulsion polymerization of two cyclosiloxane monomers and can be regarded as an extremely crosslinked PDMS. The interpenetration of polymer chains between CHP and matrix increases the interface adhesion to transfer the stress while the high modulus contrast can prevent the propagation of cracks, resulting in a high toughness without a sharp increase in stiffness. At the same time, the low friction between the filler and matrix reduces viscosity and hysteresis. Moreover, by incorporating magnetically responsive Fe3O4 nanoparticles, the CHP microspheres can be aligned. Aligned-CHP/PDMS composites exhibit a fracture toughness of 4223 J/m2, three times higher than SiO2 reinforced composites and nearly an order of magnitude higher than pure PDMS. These composites also have a lower modulus (3.3 MPa), lower hysteresis (0.167), and a viscosity two orders of magnitude lower compared to SiO2-filled counterparts. This method offers a new pathway for toughening siloxane elastomers without affecting other properties.

聚二甲基硅氧烷（PDMS）具有许多独特的优点，但其断裂韧性较差（300-500 J/m2），限制了其应用范围。通过链改性或无机填料增韧 PDMS 的传统方法可能会对其他性能产生负面影响，如增加滞后性、刚度或粘度。为了解决这个问题，我们引入了有机环硅氧烷杂化聚合物（CHP）微球来增韧 PDMS。这些微球是通过两种环硅氧烷单体的乳液聚合合成的，可视为一种极度交联的 PDMS。CHP 与基体之间聚合物链的相互渗透增加了界面粘附力，从而可以传递应力，而高模量对比可以防止裂纹扩展，从而在不急剧增加刚度的情况下获得高韧性。同时，填料与基体之间的低摩擦力可降低粘度和滞后性。此外，通过加入具有磁响应性的 Fe3O4 纳米粒子，CHP 微球还可以对齐。对齐的 CHP/PDMS 复合材料的断裂韧性高达 4223 J/m2，是二氧化硅增强复合材料的三倍，比纯 PDMS 高出近一个数量级。这些复合材料的模量（3.3 兆帕）、滞后（0.167）和粘度也比填充二氧化硅的同类产品低两个数量级。这种方法为增韧硅氧烷弹性体而不影响其他性能提供了一条新途径。