【新文速递】2024年5月7日复合材料SCI期刊最新文章

今日更新：Composite Structures 4 篇，Composites Part A: Applied Science and Manufacturing 1 篇，Composites Part B: Engineering 1 篇Composite StructuresNumerical simulations and testing of notched composite plates under envelope loadings: Validation with the safe life domain methodFlorent Grotto, Christophe Bouvet, Bruno Castanié, Joël Serradoi:10.1016/j.compstruct.2024.118191缺口复合材料板在包络载荷下的数值模拟与试验:安全寿命域方法的验证The certification of aircraft structures specifies various loads, possibly combined, to be considered to demonstrate its strength. In general, structural testing up to static failure is performed using proportional loading. In this study, the effects of loading with combinations of tension-shear-pressure are studied on large notched composite specimens. The VERTEX test rig is used. The Safe Life Domain method is proposed to validate whole domains of loading combination by means of a single envelope test. Envelope validation tests are implemented on tension-shear loadings with and without pressure, based on numerical predictions of the specimen failure and of the bench behaviour. Buckling mode variability and its impact on failure is considered, to show possible path-dependency of failure and thus highlight an ignored complexity of structure failure. Therefore, the numerous proportional tests needed for compliance demonstration can be reduced thanks to a few envelope tests instead.飞机结构的认证规定了各种载荷，可能是组合的，要考虑证明其强度。一般来说，结构测试直到静态破坏是使用比例加载进行的。本文研究了拉-剪-压组合加载对大型缺口复合材料试件的影响。使用VERTEX测试平台。提出了用单包络试验验证荷载组合全域的安全寿命域方法。包络验证试验是在有压力和无压力的拉伸-剪切载荷下实施的，基于试样破坏和工作台行为的数值预测。考虑屈曲模态变异及其对破坏的影响，以显示破坏可能的路径依赖性，从而突出被忽视的结构破坏的复杂性。因此，合规性演示所需的大量比例测试可以通过几个信封测试来减少。Design and optimization of Anisotropy–Inspired AlSi10Mg metamaterials with tailored mechanics and mass transport properties in tissue engineeringZhitong Li, Zhaobo Chen, Xiongbiao Chen, Runchao Zhaodoi:10.1016/j.compstruct.2024.118179组织工程中具有定制力学和质量输运特性的各向异性激发AlSi10Mg超材料的设计与优化Metamaterials are widely used for achieving tailored multi–physical properties. However, it is challenging to satisfy multiple property requirements simultaneously. For example, the mechanical and mass transport properties of bionic scaffolds have to be compromised. In this work, 3D–printed metamaterials with adjustable topological features are proposed, and a topological optimization strategy for coordinating multiple properties is developed. Tradeoffs between the mechanics, energy absorption capacity, and mass transport properties are accomplished under given a porosity. Anisotropic metamaterials with permeabilities of 2.34 ∼ 3.44 × 10-7 m2 and elastic moduli of 1.37 ∼ 3.14 GPa were obtained, and the gradient scaffolds were further designed to realize adjustable local characteristics. The optimized design technique described here can serve as an effective way to design more complex multilayered scaffolds with structural characteristics and biomechanical properties similar to those of natural tissue, so as to achieve an unprecedented level of tailoring multi–physics properties in tissue engineering, especially in the design of gradient scaffolds. Our study also represents advances in property decoupling, individual customization and collaborative design of metamaterials, which can be generalized to fluid and heat transport fields.超材料被广泛用于实现定制的多物理性质。然而，同时满足多个属性需求是一项挑战。例如，仿生支架的机械和质量传输特性必须妥协。本文提出了具有可调节拓扑特征的3d打印超材料，并提出了一种协调多种特性的拓扑优化策略。在给定的孔隙度下，在力学、能量吸收能力和质量传递特性之间进行权衡。获得了渗透率为2.34 ~ 3.44 × 10-7 m2、弹性模量为1.37 ~ 3.14 GPa的各向异性超材料，并进一步设计了梯度支架，以实现可调的局部特性。本文所描述的优化设计技术可以作为设计更复杂的多层支架的有效途径，使其具有与天然组织相似的结构特征和生物力学性能，从而在组织工程中，特别是在梯度支架的设计中，达到前所未有的裁剪多物理特性的水平。我们的研究还代表了超材料性质解耦、个性化定制和协同设计的进展，这些进展可以推广到流体和热输运领域。Solution of nonlinear vibration problem of shear deformable multilayer nonhomogeneous orthotropic plates using poincare-lindstedt methodM. Avey, N. Fantuzzi, A.H. Sofiyevdoi:10.1016/j.compstruct.2024.118189用poincarei -lindstedt方法求解剪切变形多层非均匀正交各向异性板的非线性振动问题In this study, one of the first attempts is made to solve the nonlinear (NL) vibration problem of shear-deformable multilayer plates consisting of nonhomogeneous orthotropic layers (NHOLs) using the Poincaré-Lindstedt method. First, the shear deformation theory (SDT) for homogeneous plates is extended to multilayer plates composed of NHOLs. In the framework of von-Karman type nonlinear theory, the basic relations of the plates in question are established and then NL equations of motion based on four functions such as rotation angles, Airy stress and deflection functions are derived. Then, NL-partial differential equations (NL-PDEs) are reduced to NL-ordinary differential equations (NL-ODE) and the solution of NL-ODE is performed for the first time by the modified Poincaré −Lindstedt method, yielding new amplitude dependent expressions for NL frequency, and for the ratio of NL frequency to linear (NL/L) frequency for multilayer plates consisting of NHOLs. Finally, detailed parametric studies are carried out to gain insight into the effects of various factors such as shear strains, non-homogeneity, number and array of layers on the NL frequencies under different rectangular plate characteristics.本文首次尝试用poincar<s:1> - lindstedt方法求解由非均匀正交各向异性层组成的剪切变形多层板的非线性振动问题。首先，将均匀板的剪切变形理论(SDT)推广到由NHOLs组成的多层板。在von-Karman型非线性理论框架下，建立了所讨论板的基本关系，推导了基于旋转角、Airy应力和挠度函数的NL运动方程。然后，将NL-偏微分方程(NL- pdes)简化为NL-常微分方程(NL- ode)，并首次采用改进的poincar<s:1>−Lindstedt方法求解NL- ode，得到了NL频率和NL频率与线性频率之比(NL/L)的新的振幅相关表达式。最后，进行了详细的参数化研究，以深入了解剪切应变、非均匀性、层数和层阵等因素对不同矩形板特性下NL频率的影响。A unified hybrid micromechanical model for predicting the thermal and electrical conductivity of graphene reinforced porous and saturated cement compositesHuanxun Liu, Chuang Feng, Yucheng Fan, Ziyan Hang, Jinzhu Zhangdoi:10.1016/j.compstruct.2024.118202预测石墨烯增强多孔和饱和水泥复合材料导热性和导电性的统一混合微观力学模型Graphene fillers have gained widespread attention as functional reinforcements for cement composites due to their excellent physical properties. The prediction of the thermal and electrical properties of graphene reinforced cement composites (GRCCs) is of great importance for developing intelligent and multifunctional civil engineering materials and structures. In this current work, a unified hybrid micromechanical model combining effective medium theory (EMT) and Mori-Tanaka-Benveniste (MTB) is developed to simultaneously predict the thermal and electrical conductivity of the GRCCs with considering pores and saturation, in which mechanisms including phonon transport, electron tunnelling and Maxwell-Wagner-Sillars (MWS) polarization are incorporated. Graphene nanoplatelets (GNPs) reinforced cement composites (GNPRCCs) samples are prepared and tested to validate the developed unified model. The results show that the electrical conductivity of the GNPRCCs is more sensitive to saturation than the thermal conductivity. When the porosity n = 0.2 and the GNP concentration is 1 wt%, the relative thermal and electrical conductivity increases by 5 % and 193 %, respectively, when the saturation index increases from 0.6 to 1. Elongated pores are more favorable for the formation of ionic networks for electrical conductivity in the saturated GNPRCCs, while spherical pores are more beneficial for heat transport. Elongated graphene fillers are preferred for enhancing both the thermal and electrical conductivity of dry and saturated GNPRCCs. The work is envisaged to provide guidelines for developing multifunctional cement composites.石墨烯填料作为水泥复合材料的功能性增强材料，因其优异的物理性能而受到广泛关注。石墨烯增强水泥复合材料(grcc)的热电性能预测对于开发智能化、多功能的土木工程材料和结构具有重要意义。本文结合有效介质理论(EMT)和Mori-Tanaka-Benveniste (MTB)建立了一个统一的混合微观力学模型，在考虑孔隙和饱和度的情况下，同时预测了grcc的导热性和导电性，其中包括声子输运、电子隧穿和Maxwell-Wagner-Sillars (MWS)极化机制。制备了石墨烯纳米薄片(GNPs)增强水泥复合材料(GNPRCCs)样品，并对其进行了测试，以验证所开发的统一模型。结果表明，gnprcc的电导率比导热系数对饱和更敏感。当孔隙度n = 0.2,GNP浓度为1 wt%时，当饱和指数由0.6增加到1时，相对导热系数和导电性分别增加5 %和193 %。在饱和gnprcc中，细长孔更有利于离子网络的形成，而球形孔更有利于热传递。细长的石墨烯填料是提高干燥和饱和gnprcc的导热性和导电性的首选材料。预计这项工作将为开发多功能水泥复合材料提供指导。Composites Part A: Applied Science and ManufacturingMussel-like carbon fiber/MnO2 nanosheet heterostructures for mechanically strong carbon fiber/polyamide composites with excellent electromagnetic interference shieldingNa Sun, Quanqing Cui, Kun Qiao, Ye Zhang, Jiaqi Zhou, Shuhan Yan, Lu Liu, Bo Zhu, Bin Yudoi:10.1016/j.compositesa.2024.108260 类贻贝碳纤维/二氧化锰纳米片异质结构的机械强碳纤维/聚酰胺复合材料具有优异的电磁干扰屏蔽In order to construct carbon fiber (CF) reinforced polyamide 6 (PA6) composites with both excellent mechanical properties and electromagnetic interference (EMI) shielding properties, in this paper, a multiscale coating of PDA-MnO2 was constructed on the CF surface based on the in-situ growth process of polydopamine (PDA) and δ-phase manganese dioxide (δ-MnO2) nanosheets. Interestingly, the introduction of PDA not only improved the yield and the crystal regularity of MnO2 nanosheets, but also enabled the strength of CF to be maintained. The interlayer shear strength and interfacial shear strength of the modified CF/PA6 composites were increased by 19.45% and 37.45%, respectively, compared with those of the desized CF/PA6 composites. Meanwhile, the introduction of MnO2 nanosheets also improved the EMI shielding performance of the composites to commercial standards. The interfacial enhancement and EMI shielding mechanisms of the composites were elaborated, which enriched the theoretical system of CF composites for multifunctional applications.为了构建具有优异力学性能和电磁干扰屏蔽性能的碳纤维(CF)增强聚酰胺6 (PA6)复合材料，本文基于聚多巴胺(PDA)和δ相二氧化锰(δ-MnO2)纳米片的原位生长工艺，在CF表面构建了一种多尺度的PDA- mno2涂层。有趣的是，PDA的引入不仅提高了MnO2纳米片的产率和晶体规则性，而且使CF的强度得以保持。改性后的CF/PA6复合材料的层间抗剪强度和界面抗剪强度分别比浆料CF/PA6复合材料提高了19.45%和37.45%。同时，二氧化锰纳米片的引入也将复合材料的电磁干扰屏蔽性能提高到商业标准。阐述了复合材料的界面增强和电磁干扰屏蔽机理，丰富了CF复合材料多功能应用的理论体系。Composites Part B: EngineeringDevelopment of Ag@Si composite sinter joining with ultra-high resistance to thermal shock test for SiC power device: experiment validation and numerical simulationYang Liu, Chuantong Chen, Ye Wang, Zheng Zhang, Ran Liu, Minoru Ueshima, Ichiro Ota, Hiroshi Nishikawa, Masahiko Nishijima, Koji S. Nakayama, Katsuaki Suganumadoi:10.1016/j.compositesb.2024.111519 SiC功率器件用超高抗热冲击Ag@Si复合烧结接头的研制:实验验证与数值模拟Owing to its cost-effectiveness and low coefficient of thermal expansion (CTE), micron Si is incorporated into sintered Ag matrix to develop an Ag@Si composite sintering strategy. The Si integration helps reduce cost and alleviate CTE-mismatch of Ag-sintered die attachments. An innovative Ag@Si composite sintering structure is achieved by low-temperature and pressure-less sintering process, where a possibly slight diffusion of native SiO2 on the Si surface toward Ag is indicated by TEM observation, enabling the integration of Ag and Si into one continuous network. Owing to the robust well-bonded composite sintering, the Ag@Si joining strategy provides mechanical/microstructural reliability far beyond the pure Ag sinter joining, demonstrating significant prospects in high-temperature interconnection applications. During the harsh thermal cycling (−50∼250°C), the mitigating effect of the Si addition on CTE mismatch is manifested through the substantial suppression of microstructure deterioration in Ag@Si joint that occurs in pure-Ag-sintered joint, while the shear strength retention rate is doubled. Detailed investigation into the mechanism for elevated performance was conducted by material property and Missies stress analysis. The incorporation of Si helps modify the CTE, elastic properties, and stress distribution of Ag@Si-sintered material, synergistically contributing to the satisfactory joining reliability.由于其成本效益和低热膨胀系数(CTE)，微米硅被纳入烧结银基体开发Ag@Si复合烧结策略。Si集成有助于降低成本，缓解银烧结模具附件的cte不匹配。通过低温无压烧结工艺，获得了一种创新的Ag@Si复合烧结结构，透射电镜观察表明，天然SiO2可能在Si表面向Ag扩散，从而使Ag和Si集成为一个连续的网络。由于结合良好的复合材料烧结，Ag@Si连接策略提供了远远超过纯银烧结连接的机械/显微组织可靠性，在高温互连应用中具有重要的前景。在严酷的热循环过程中(- 50 ~ 250°C)，添加Si对CTE失配的缓解作用表现为显著抑制了纯银烧结接头Ag@Si接头的微观组织劣化，同时抗剪强度保持率提高了一倍。通过材料性能分析和Missies应力分析，详细探讨了提高性能的机理。Si的加入有助于改变Ag@Si-sintered材料的CTE、弹性性能和应力分布，协同作用有助于获得令人满意的连接可靠性。来源：复合材料力学仿真Composites FEM