【新文速递】2024年5月3日复合材料SCI期刊最新文章

   

今日更新：Composites Part A: Applied Science and Manufacturing 3 篇，Composites Part B: Engineering 1 篇

Composites Part A: Applied Science and Manufacturing

Dynamic behavior of twisted UHMWPE yarns

Haoxiang Wang, Yue Shen, Jian Wei, Yu Long, Manyao Zhu, Jiagui Liu, Biwei Deng, Zhongwei Zhang, Ziming Xiong, Fan Wu, Han Meng, Jinling Gao

doi:10.1016/j.compositesa.2024.108242

超高分子量聚乙烯绞合纱的动力性能

Twisting is an effective method to reduce defects during fabric weaving and improve the impact resistance of the armor material. This study examined the dynamic behavior of twisted ultra-high molecular weight polyethylene (UHMWPE) yarns. Material characterization was conducted using three-dimensional X-ray tomography and scanning electron microscopy (SEM). Dynamic mechanical experiments were carried out on the twisted yarns using a Kolsky bar, with the yarn's failure process captured in real time through high-speed imaging. Additionally, the digital imaging correlation (DIC) technique was used to calibrate the strain measured by the Kolsky bar. Post-fracture analysis was performed using SEM. The effects of twisting extent, strain rate, and gauge length on the dynamic behavior of twisted yarns were studied. It was observed that all twisted yarns underwent elongation, shrinkage, fiber breakage, untwisting, and yarn rupture. Furthermore, as the twisting degree and strain rate increased, and the gauge length decreased, the fracture area became more concentrated. The tensile strength peaked at a twisting degree of 250 t/m and decreased thereafter. Moreover, twisting was found to alter the sensitivity of the yarns' stress–strain curves and tensile properties to the strain rate and gauge length.

加捻是减少织物织造缺陷，提高装甲材料抗冲击性能的有效方法。研究了超高分子量聚乙烯(UHMWPE)捻制纱线的动态性能。利用三维x射线断层扫描和扫描电子显微镜(SEM)对材料进行了表征。利用科尔斯基杆对捻纱进行动态力学实验，通过高速成像实时捕捉纱线的失效过程。此外，采用数字成像相关(DIC)技术对Kolsky棒测量的应变进行校准。骨折后进行扫描电镜分析。研究了加捻程度、应变速率和纱条长度对加捻纱动态性能的影响。观察到所有的捻纱都经历了伸长、收缩、纤维断裂、解捻和成纱断裂。随着扭扭程度和应变速率的增大，以及规范长度的减小，断口区域更加集中。抗拉强度在扭转程度为250 t/m时达到峰值，此后逐渐降低。此外，加捻还改变了纱线的应力-应变曲线和拉伸性能对应变速率和规长的敏感性。

Construction of PAN composite fibers with flame retardant, smoke suppression and enhanced mechanical properties based on self-assembled supramolecular network

Chunlong Zuo, Li Wang, Xizhi Chen, Lina Jiang, Wei Tan, Lixiao Gao, Yongli Zhang, Yuanlin Ren, Xiaohui Liu

doi:10.1016/j.compositesa.2024.108244

 

基于自组装超分子网络的阻燃、抑烟和增强力学性能的PAN复合纤维的构建

To fabricate polyacrylonitrile (PAN) composite fibers with superior flame retardancy, smoke suppression and enhanced mechanical properties, a novel water insoluble biomass-based flame retardant, TPPA@PAO, was synthesized, which was then blended with PAN spinning solution and Co2+ solution was used as the coagulation bath to prepare modified PAN composite fibers (TPPA@PAO-Co/PAN). The elongation at break and tensile strength of TPPA@PAO-Co/PAN increased by 36.5 % and 45.4 % due to the formed three-dimensional cross-linked supramolecular network among TPPA@PAO, Co2+ and PAN. Furthermore, the limiting oxygen index of TPPA@PAO-Co/PAN increased from 17.3 % of the control PAN to 33.7 %. The peak of heat release rate, total heat release, peak of smoke production rate, total smoke production and CO production rate were reduced by 78.1 %, 63.5 %, 81.1 %, 85.0 % and 73.1 %, respectively. The work developed a novel approach for fabricating PAN composite fibers with simultaneous flame retardant, smoke suppression and enhanced mechanical properties, expanding its application field.

为制备具有优异阻燃、抑烟和增强力学性能的聚丙烯腈(PAN)复合纤维，合成了一种新型水不溶性生物质阻燃剂TPPA@PAO，将其与PAN纺丝液混纺，以Co2+溶液为混凝浴制备改性PAN复合纤维(TPPA@PAO-Co/PAN)。由于TPPA@PAO、Co2+和PAN之间形成三维交联超分子网络，TPPA@PAO-Co/PAN的断裂伸长率和抗拉强度分别提高了36.5% %和45.4% %。此外，TPPA@PAO-Co/PAN的极限氧指数由对照PAN的17.3 %提高到33.7 %。放热速率峰值、总放热速率峰值、产烟速率峰值、总产烟速率和CO速率分别降低了78.1 %、63.5 %、81.1 %、85.0% %和73.1 %。本研究为制备同时具有阻燃、抑烟和增强力学性能的PAN复合纤维开辟了一条新途径，拓展了其应用领域。

Fabrication of TiB2/6061Al composite with tailoring heterostructure and superior mechanical properties and investigation on deformation behaviors

Zhigang Li, Liang Chen, Zhenming Yue, Lihua Qian, Biaohua Que, Cunsheng Zhang

doi:10.1016/j.compositesa.2024.108245

 

具有定制异质结构和优异力学性能的TiB2/6061Al复合材料的制备及变形行为研究

Overcoming the trade-off between strength and ductility remains a critical challenge for Al matrix composites. Here, TiB2/6061Al composites with harmonic and lamellar heterostructures were fabricated via hot press sintering by altering the size of Al powders. The discontinuous dynamic recrystallization (DDRX) and DRX take place, with DDRX being particularly promoted by the presence of fine grains around coarse grains. The activated slip systems of the grains with similar orientations are nearly identical during tension, while those of the randomly orientated grains vary significantly. Geometrically necessary dislocations form in fine grains due to their limited deformation compatibility, and also in the boundaries between fine and coarse grains. The heterostructured composite exhibits a superior strength-ductility synergy compared to the homogeneous composite, attributed to the hetero-deformation induced strengthening and dislocation strengthening. Strain concentrates in fine-grain zones with TiB2 particles, while the strain concentration is alleviated in coarse-grain zones, contributing to a high elongation.

克服强度和延性之间的平衡仍然是铝基复合材料面临的关键挑战。采用热压烧结的方法，通过改变Al粉末的尺寸，制备了具有谐波和片层异质结构的TiB2/6061Al复合材料。发生了不连续动态再结晶(DDRX)和DRX，其中粗晶周围细晶的存在特别促进了DDRX。取向相似的晶粒在拉伸过程中的激活滑移体系基本相同，而取向随机的晶粒在拉伸过程中的激活滑移体系差异较大。几何上必要的位错形成在细小晶粒由于其有限的变形相容性，也在细晶粒和粗晶粒之间的边界。与均质复合材料相比，异质结构复合材料表现出更好的强度-塑性协同作用，这是由于异质变形引起的强化和位错强化。应变集中在有TiB2颗粒的细晶区，而在粗晶区应变集中得到缓解，从而获得较高的延伸率。

Composites Part B: Engineering

Nacre-inspired MMT-MXene integrated shear-stiffening gel composites for personal safeguard and multi-functional electronics

Zimu Li, Sheng Wang, Wenhui Wang, Jianpeng Wu, Zhentao Zhang, Danyi Li, Jinyu Yang, Junshuo Zhang, Yu Wang, Xinglong Gong

doi:10.1016/j.compositesb.2024.111526

 

ncore启发的MMT-MXene集成剪切硬化凝胶复合材料，用于个人保护和多功能电子产品

Developing structural composites with high energy-dissipating performance was vital for advancing personal protective equipment. Here, a nacre-mimetic composite with anti-impact, force-sensing and thermal-regulating performance was developed by introducing shear-stiffening gel (SSG) into montmorillonite (MMT)-MXene hierarchical network. A 4 mm-thick SSG-MMT-MXene (SMM) composite effectively reduced the impact force from 1308.1 N to 370.4 N, which was superior to many engineering materials. SMM implemented significant improvement of both structural stability and environmental adaptability. In addition, its ΔR/R0 increased from 230.3% to 14608.6% under impact, indicating SMM’s potential as an electronic skin for environmental monitoring. Besides, its temperature reached 110.4 °C at 9 V loading-voltage and remained stable during multiple loading-unloading stimuli. Eventually, an SMM-based customizable intelligent protector was developed, enabling the detection of environmental variations and providing protection against mechanical impact and cold conditions. This novel strategy showed promising applications in lightweight body-armor and wearable electronics.

开发具有高能量耗散性能的结构复合材料对于个人防护装备的发展至关重要。在这里，通过在蒙脱石（MMT）-MXene 分层网络中引入剪切增韧凝胶（SSG），开发出了一种具有抗冲击、力传感和热调节性能的珍珠岩仿生复合材料。4 毫米厚的 SSG-MMT-MXene 复合材料（SMM）有效地将冲击力从 1308.1 牛顿减少到 370.4 牛顿，优于许多工程材料。SMM 显著提高了结构稳定性和环境适应性。此外，在冲击力作用下，其 ΔR/R0 从 230.3% 增加到 14608.6%，这表明 SMM 具有作为环境监测电子皮肤的潜力。此外，在 9 V 加载电压下，其温度达到 110.4 °C，并在多次加载-卸载刺 激下保持稳定。最终，我们开发出了一种基于 SMM 的可定制智能保护器，能够检测环境变化，并提供机械冲击和寒冷条件下的保护。这种新颖的策略在轻型护甲和可穿戴电子设备中的应用前景广阔。