【新文速递】2024年2月29日固体力学SCI期刊最新文章_ACT_Mechanical_System_Abaqus_Deform_振动_疲劳_断裂_碰撞_非线性_通用_核能_油气_理论

【新文速递】2024年2月29日复合材料SCI期刊最新文章

今日更新：Composites Part A: Applied Science and Manufacturing 1 篇，Composites Part B: Engineering 3 篇，Composites Science and Technology 1 篇Composites Part A: Applied Science and ManufacturingStochastic modelling of out-of-autoclave epoxy composite cure cycles under uncertaintyMolly Hall, Xuesen Zeng, Tristan Shelley, Peter Schubeldoi:10.1016/j.compositesa.2024.108110不确定情况下高压釜外环氧树脂复合材料固化周期的随机建模Thermoset polymers and composites are subject to several sources of uncertainty which can produce a range of cure outcomes. Recent research into stochastically modelled thermoset cure has indicated that accounting for raw material and process uncertainty can model this range of expected output parameters. However, the uncertainty quantification methods are highly test-intensive, and the results of the simulations have been validated with limited experimental data. This study proposes a simple approach to cure kinetics uncertainty quantification that can be applied to any cure kinetics model without the need for additional testing. Stochastic cure kinetics and temperature conditions for a popular out-of-autoclave carbon fibre/epoxy prepreg were used to produce output distribution functions for key cure events, and the results were validated using data from ten cure replicates. The quantified variation expected from the cure of this prepreg resulted in processing recommendations to ensure quality metrics are met during processing.热固性聚合物和复合材料受多种不确定因素的影响，会产生一系列固化结果。最近对热固性固化随机建模的研究表明，考虑到原材料和工艺的不确定性，可以对这一系列预期的输出参数进行建模。然而，不确定性量化方法需要大量测试，而且模拟结果只能通过有限的实验数据进行验证。本研究提出了一种简单的固化动力学不确定性量化方法，可用于任何固化动力学模型，无需额外测试。针对一种常用的高压釜外碳纤维/环氧树脂预浸料，采用随机固化动力学和温度条件来生成关键固化事件的输出分布函数，并利用十次固化重复的数据对结果进行了验证。对该预浸料固化过程中的预期变化进行量化后，提出了加工建议，以确保在加工过程中达到质量指标。Composites Part B: EngineeringStrain-rate dependent mixed-mode traction laws for glass fiber-epoxy interphase using molecular dynamics simulationsSanjib C. Chowdhury, John W. Gillespiedoi:10.1016/j.compositesb.2024.111351 利用分子动力学模拟玻璃纤维-环氧树脂间相的应变速率相关混合模式牵引定律In this paper, we establish a methodology to predict strain rate-dependent mixed-mode traction-separation responses (i.e., traction laws) for glass-epoxy composite interphase using molecular dynamics (MD) simulations. Glass-epoxy interphases with monolayer glycidoxypropyltrimethoxy silane are prepared by varying silane number density from 0.0 nm−2 to 3.9 nm−2 following the epoxy-amine diffusion and curing reactions. To established the effects of strain rate and mode-mixity on the interphase traction laws, the nano-meter size interphase domain is loaded in various mode-mixity (θ = 0° (Mode−II), 15°, 30°, 45°, 60°, and 90° (Mode−I)) with full range of strain rates from quasit-static to high strain rate (∼1e16/s) where a theoretical plateau strength limit is predicted. Following our previous work on Mode-I [Chowdhury et al., Composites Part B 237 (2022) 109877], mathematical model is developed for Mode-II as function of strain rate for different interphase structures (i.e., silane number density). The continuum equivalent bi-linear cohesive traction law is developed using the MD results to determine the mode-mixity quadratic functions and associated exponents for peak tractions, energy absorption, crack initiation and crack opening displacement from the mixed-mode simulations data. The MD predicted traction laws can be used to model interphase in micromechanics finite element analysis to bridge the length scale for the prediction of fiber-matrix debonding in composites.在本文中，我们建立了一种方法，利用分子动力学（MD）模拟来预测玻璃-环氧复合材料相间的应变速率依赖性混合模式牵引分离响应（即牵引定律）。在环氧胺扩散和固化反应之后，通过改变硅烷数量密度（从 0.0 nm-2 到 3.9 nm-2），制备了具有单层缩水甘油氧丙基三甲氧基硅烷的玻璃-环氧中间相。为了确定应变速率和模式混合度对相间牵引力规律的影响，在不同的模式混合度（θ = 0° (Mode-II)、15°、30°、45°、60°和 90° (Mode-I)）和从准静态到高应变速率（∼1e16/s）的全范围应变速率下加载了纳米级相间域，并预测了理论上的高原强度极限。根据我们之前关于模式 I 的研究成果[Chowdhury 等人，Composites Part B 237 (2022) 109877]，针对不同的相间结构（即硅烷数量密度），建立了模式 II 的数学模型，并将其作为应变速率的函数。利用 MD 结果开发了连续等效双线性内聚牵引定律，以从混合模式模拟数据中确定模式-混合二次函数以及峰值牵引、能量吸收、裂纹起始和裂纹张开位移的相关指数。MD 预测的牵引定律可用于在微观力学有限元分析中建立相间模型，从而弥合复合材料中纤维-基体脱粘预测的长度尺度。Abundant nucleation sites-available liquid crystal hydrogel mimics bone ECM mineralization to boost osteogenesisLin Li, Kun Liu, Yating Lin, Wei Wen, Shan Ding, Mingxian Liu, Changren Zhou, Binghong Luodoi:10.1016/j.compositesb.2024.111340 丰富的成核点--可用液晶水凝胶模拟骨 ECM 矿化，促进骨生成Bone extracellular matrix (ECM) is a unique organic-inorganic composite material derived from highly mineralized liquid crystal (LC) organic substrate. However, it remains a substantial challenge to design bone ECM-like LC materials with sufficient available nucleation sites to mimic the mineralization process of natural bone. Herein, we designed a bioinspired hydrogel with bone ECM-like LC organic substrate and inorganic phosphate mineralization nucleation sites for robust cell biomineralization and bone regeneration. Black phosphorus (BP) nanosheet was firstly loaded by bioactive layered double hydroxide (LDH) based on electrostatic attraction to improve the stability and photothermal performance of BP. Then, the LDH@BP was creatively added into chitin whisker/poly (ethylene glycol) diacrylate (CHW/PEGDA) LC hydrogel, abbreviated as LCgel, to fabricate LCgel/LDH@BP to highly mimic the mineralization microenvironment of bone ECM. The bone ECM-like LC topology of LCgel/LDH@BP is conducive to facilitating cell adhesion, proliferation and osteogenic differentiation. More importantly, the in-situ phosphate mineralization nucleation sites combined with mild hyperthermia induced by BP can further synergistically reinforce biomineralization of cells adhered on bone ECM-like LC substrate, thus substantially promoting cell biomineralization-mediated osteogenesis in vitro and in vivo. This study opens a new insight for the design of bioinspired hydrogel for cell biomineralization-mediated osteogenesis.骨细胞外基质（ECM）是一种独特的有机-无机复合材料，由高度矿化的液晶（LC）有机基质衍生而来。然而，设计具有足够可用成核位点的类骨 ECM LC 材料以模拟天然骨骼的矿化过程仍是一项巨大挑战。在此，我们设计了一种生物启发水凝胶，该水凝胶具有类似骨 ECM 的液晶有机基底和无机磷酸盐矿化成核位点，可促进细胞生物矿化和骨再生。黑磷（BP）纳米片首先被基于静电吸引的生物活性层状双氢氧化物（LDH）负载，以提高 BP 的稳定性和光热性能。然后，创造性地将 LDH@BP 添加到甲壳素晶须/聚（乙二醇）二丙烯酸酯（CHW/PEGDA）LC 水凝胶（简称 LCgel）中，制成 LCgel/LDH@BP，高度模拟骨 ECM 的矿化微环境。LCgel/LDH@BP 类似骨 ECM 的 LC 拓扑结构有利于促进细胞粘附、增殖和成骨分化。更重要的是，原位磷酸盐矿化成核点与 BP 诱导的轻度高热相结合，可进一步协同强化粘附在骨 ECM 类 LC 基底上的细胞的生物矿化，从而大大促进细胞生物矿化介导的体外和体内成骨过程。这项研究为设计用于细胞生物矿化介导的成骨的生物启发水凝胶提供了新的思路。Enhancing mechanical performance and high-temperature lubrication enabled by MoS2/WB2 nanolayered filmsZhenrong Gao, Weiming Nie, Haixin Wang, Siming Ren, Dali Du, ShiYu Du, Jinlong Lidoi:10.1016/j.compositesb.2024.111350利用 MoS2/WB2 纳米层薄膜提高机械性能和高温润滑性能Molybdenum disulfide (MoS2) films are widespread application in aerospace, nuclear, mechanical, and electronic fields owing to their unique structural characteristics and inherent interlayer slip. However, their utility is hindered by environmental susceptibility, particularly oxidation at elevated temperatures and in humid environments, limiting their effectiveness. Herein, we report a nanocomposite integrating MoS2 with WB2 by periodic alternating arrangement, synthesized using magnetron sputtering technology. This nanolayered architecture effectively harnesses the synergistic properties of both materials, imparting exceptional mechanical properties, superior environmental adaptability and efficient high-temperature lubrication. Methodical experiments and atomistic simulations reveal the incorporation of WB2 promotes preferential growth of MoS2 along the (002) plane, yielding an impressive hardness-to-elastic modulus ratio of approximately 0.10. The resultant films demonstrate notable achievements: a minimal friction coefficient of 0.056 and a specific wear rate of 1.88 × 10−7 mm3 N−1 m−1 in humid air. These findings are primarily stem from the synergistic interaction between MoS2 and metal-oxide nanoparticles at the sliding interface. Remarkably, even at 400 °C, the engineered MoS2/WB2 nanocomposite achieves low friction and wear under high contact stress, outperforming conventional MoS2-based materials. This innovative design, complemented by insights into the high-temperature friction mechanism, holds promise for advancing the development of robust and high-temperature-resistant lubricants.二硫化钼（MoS2）薄膜因其独特的结构特征和固有的层间滑移特性，被广泛应用于航空航天、核能、机械和电子领域。然而，由于其易受环境影响，特别是在高温和潮湿环境中易氧化，限制了其应用的有效性。在此，我们报告了一种利用磁控溅射技术通过周期性交替排列将 MoS2 与 WB2 集成在一起的纳米复合材料。这种纳米层状结构有效地利用了两种材料的协同特性，赋予了它们优异的机械性能、卓越的环境适应性和高效的高温润滑性。循序渐进的实验和原子模拟显示，WB2 的加入促进了 MoS2 沿 (002) 平面的优先生长，从而产生了令人印象深刻的硬度-弹性模量比（约为 0.10）。由此产生的薄膜取得了显著的成就：最小摩擦系数为 0.056，在潮湿空气中的特定磨损率为 1.88 × 10-7 mm3 N-1 m-1。这些发现主要源于 MoS2 和金属氧化物纳米颗粒在滑动界面上的协同作用。值得注意的是，即使在 400 °C 温度下，工程 MoS2/WB2 纳米复合材料也能在高接触应力下实现低摩擦和低磨损，性能优于传统的 MoS2 材料。这种创新设计，加上对高温摩擦机理的深入了解，有望推动坚固耐用的耐高温润滑剂的开发。Composites Science and TechnologyUltrawide sensing-range, super durable and high-strength epoxy/carbon fiber composites sensor based on stress-induced structureMengman Weng, Zhao-xia Huang, Qing-wen Yuan, Zhi-hua Liu, Jin-ping Qudoi:10.1016/j.compscitech.2024.110522 基于应力诱导结构的超宽传感范围、超耐用、高强度环氧树脂/碳纤维复合材料传感器Nowadays, high-pressure sensors are broadly utilized in manufacturing and applications for ensuring safe production and preventing failures. However, present high-pressure sensors are mainly fabricated by high-strength metal and cement, which are too heavy or easy-corrosive to satisfy long-term usage. Polymer piezoresistive materials have great potential due to their stability and light weight, but achieving high strength and durability at the same time remains a serious challenge. In this work, a high-strength pressure sensor is fabricated by epoxy resin/carbon fiber (EP/CF) composite, where CF builds a conductive network as a reinforcing phase and EP provides a durable and light-weight base phase. The conductive mechanism based on stress-induced structure has been elucidated, and the performance of related sensors in various conditions is revealed. The lightweight(∼1.28 g/cm3) pressure sensor manifests a wide sensing response range from 22 kPa to 80 MPa. Moreover, the durability of this novel pressure sensor is verified by repeating loading and unloading at a high pressure of 10 MPa for more than 3500 cycles. Meanwhile, the high temperature and water resistance are furtherly confirmed, where EP/CF composites exhibits excellent cycling stability (10 MPa, >1000 cycles) after heating (100 °C) or soaking in water. Attributed to the comprehensive performance of high-strength, ultrawide detection range, durability and light weight, EP/CF composites are applied for road safety monitoring and deep-sea operation, showing wide application prospects in high-pressure monitoring field.如今，高压传感器被广泛应用于制造业和各种应用领域，以确保安全生产和防止故障发生。然而，目前的高压传感器主要由高强度金属和水泥制成，重量过重或易腐蚀，无法满足长期使用的要求。聚合物压阻材料因其稳定性和轻质性而具有巨大潜力，但同时实现高强度和耐用性仍是一项严峻挑战。本研究采用环氧树脂/碳纤维（EP/CF）复合材料制作了一种高强度压力传感器，其中碳纤维作为增强相构建了导电网络，而 EP 则提供了耐用且轻质的基相。该材料阐明了基于应力诱导结构的导电机制，并揭示了相关传感器在各种条件下的性能。这种轻型（1.28 克/立方厘米）压力传感器的传感响应范围从 22 千帕到 80 兆帕不等。此外，通过在 10 兆帕高压下重复加载和卸载超过 3500 次，验证了这种新型压力传感器的耐用性。同时，EP/CF 复合材料的耐高温和耐水性也得到了进一步证实，在加热（100 °C）或浸泡在水中后，EP/CF 复合材料表现出卓越的循环稳定性（10 兆帕，大于 1000 次循环）。EP/CF 复合材料具有高强度、超宽检测范围、耐久性和轻质等综合性能，可应用于道路安全监测和深海作业，在高压监测领域具有广阔的应用前景。来源：复合材料力学仿真Composites FEM

【新文速递】2024年2月29日固体力学SCI期刊最新文章

International Journal of Solids and Structures

Journal of the Mechanics and Physics of Solids

International Journal of Plasticity

Thin-Walled Structures

【新文速递】2024年2月29日复合材料SCI期刊最新文章