Composite Structures最新文献_第5页

Performance assessment of 3D printed multi-material energy absorber for automotive bumper: pedestrian lower extremity protection 汽车保险杠用3D打印多材料吸能器性能评价：行人下肢保护

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-09 DOI: 10.1016/j.compstruct.2026.120056

Komal Chawla , Ahmed Arabi Hassen , Nikhil Garg , Deepak Kumar Pokkalla , Tyler Smith , Brittany Rodriguez , Desheng Yao , Rayne Zheng , Ellen Lee , Iskander Farooq , Matthew Rebandt , Asim Khan , Seokpum Kim

Designing an energy absorber for automotive bumpers involves balancing low-speed and high-speed impacts to ensure safety, reduce repair costs, and meet regulatory standards. This study explores a novel design using multi-material 3D printing and structural optimization to fabricate a lightweight and cost-efficient energy absorber. The design effectively dissipates energy in low-speed collisions and minimizes force transmission in high-speed pedestrain impacts, helping to meet both safety and performance requirements. The energy absorber design combines 20% carbon fiber-reinforced acrylonitrile butadiene styrene (CF-ABS) and thermoplastic polyurethane (TPU) for optimal stiffness and flexibility. It uses 3D-printed lattice structures optimized through finite element simulations to help meet both low-speed and high-speed impact requirements. Full-scale energy absorbers were 3D-printed using optimized CF-ABS/TPU blends and tested under high-speed impact using the Flexible Pedestrian Legform Impactor (Flex-PLI). For fair comparison, a baseline bumper with a traditional triangular lattice structure, also 3D-printed from the same CF-ABS/TPU materials, was similarly tested. Interestingly, both the optimized and baseline 3D-printed energy absorbers showed nearly identical performance, successfully meeting injury limits. Their performances were also benchmarked against an injection-molded energy absorber. While both 3D-printed and injection-molded designs met injury limits, the 3D-printed absorber exhibited a higher tibia bending moment, indicating an opportunity for further optimization. A Techno-Economic Analysis compared the costs of producing energy absorbers using traditional manufacturing and 3D printing. The analysis highlighted that 3D printing offers cost benefits for low to medium production volumes, with the total cost per energy absorber at ∼ $74, compared to traditional methods that become economical beyond 2000 units.

设计汽车保险杠的能量吸收器需要平衡低速和高速碰撞，以确保安全，降低维修成本，并符合监管标准。本研究探索了一种使用多材料3D打印和结构优化的新设计，以制造轻质且经济高效的能量吸收器。这种设计在低速碰撞中有效地耗散能量，在高速行人碰撞中最大限度地减少力传递，有助于满足安全和性能要求。能量吸收器的设计结合了20%的碳纤维增强丙烯腈-丁二烯苯乙烯（CF-ABS）和热塑性聚氨酯（TPU），以获得最佳的刚度和灵活性。它使用通过有限元模拟优化的3d打印晶格结构，以帮助满足低速和高速冲击要求。采用优化的CF-ABS/TPU共混物对全尺寸吸能器进行了3d打印，并使用Flexible Pedestrian Legform impact （Flex-PLI）在高速冲击下进行了测试。为了公平比较，采用相同CF-ABS/TPU材料3d打印的传统三角形晶格结构的基准保险杠也进行了类似的测试。有趣的是，优化后的能量吸收器和基线3d打印的能量吸收器表现出几乎相同的性能，成功地满足了伤害限制。它们的性能也与注射成型能量吸收器进行了基准测试。虽然3d打印和注塑设计都符合损伤限制，但3d打印的减振器表现出更高的胫骨弯矩，这表明有进一步优化的机会。一项技术经济分析比较了使用传统制造和3D打印生产能量吸收器的成本。分析强调，与传统方法相比，3D打印为中低产量提供了成本效益，每个能量吸收器的总成本为74美元，超过2000个单位就变得经济。

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引用次数: 0

Steering for in-situ AFP-manufactured structures: Part 1 - Critical arc length 原位afp制造结构的转向。第1部分：临界弧长

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-09 DOI: 10.1016/j.compstruct.2025.120023

Lukas Raps, Ashley R. Chadwick, Heinz F. Voggenreiter

Automated Fiber Placement (AFP) of thermoplastic composites offers a pathway to efficient, Out-of-Autoclave (OoA) manufacturing of large aerospace structures. This work investigates the in-plane path curvature (steering) required for double-curved geometries and the following transient steering effects and defect formation. A novel “critical arc length” concept is introduced to define the limits of viable steered layup paths. Results demonstrate that sub-critical steering radii do not significantly impact interlaminar shear or bending strength, though a minor reduction in bending modulus is observed near the critical arc length, likely attributable to increased fiber waviness. These findings expand the design space for steered thermoplastic composite structures.

热塑性复合材料的自动纤维放置（AFP）为大型航空航天结构的高效、非高压灭菌（OoA）制造提供了一条途径。这项工作研究了双曲线几何所需的平面内路径曲率（转向）以及以下瞬态转向效应和缺陷形成。引入了一种新的“临界弧长”概念来定义可行的定向上铺路径的极限。结果表明，亚临界转向半径对层间剪切或弯曲强度没有显著影响，但在临界弧长附近观察到弯曲模量略有下降，这可能归因于纤维波纹度的增加。这些发现扩大了导向热塑性复合材料结构的设计空间。

引用次数: 0

Enhanced microwave absorption and corrosion resistance via magnetoelectric complementary FeCoAlY@Li2ZnTi3O8 core-shell architecture 通过磁电互补FeCoAlY@Li2ZnTi3O8核壳结构增强微波吸收和耐腐蚀性

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-09 DOI: 10.1016/j.compstruct.2025.120029

Yingli Zhu , Yun Hu , Pingan Chen , Fu Chen , Mengke Qiao , Jiang Wu , Xiangcheng Li

To address the critical issues of degraded microwave absorption performance and poor structural stability of magnetic microwave absorbers under extreme environments, this study developed magnetoelectric complementary FeCoAlY@Li₂ZnTi₃O₈ (FCAY@LZTO) core–shell composites via plasma-assisted ball milling method. The LZTO shell reduces the corrosion rate of FCAY from 7.52 mm/year to 4.44 mm/year and the corrosion current density from 12.9 μA·cm⁻² to 7.63 μA·cm⁻², while effectively inhibiting oxidation at elevated temperatures. In addition, the magnetoelectric synergistic effect and abundant heterogeneous interfaces in the core–shell structure significantly optimize impedance matching, enhance polarization loss and multiple scattering effects. As a result, the composites exhibit an effective absorption bandwidth (EAB) of 8.04 GHz and a minimum reflection loss (RL_min) of −63.37 dB at a thickness of 1.6 mm. It also maintains excellent absorption stability at 500 ℃, exhibiting an EAB of 2.57 GHz and an RL_min of −18.65 dB in the X-band. This work demonstrates a synergistic improvement in both corrosion resistance and microwave absorption performance through core–shell structure design, providing theoretical insights and technical guidance for developing multifunctional microwave absorbers under harsh environments.

为了解决磁性微波吸收材料在极端环境下微波吸收性能下降和结构稳定性差的关键问题，本研究通过等离子体辅助球磨方法开发了磁电互补FeCoAlY@Li2ZnTi3O8 （FCAY@LZTO）核壳复合材料。LZTO外壳使fcaay的腐蚀速率从7.52 mm/年降低到4.44 mm/年，腐蚀电流密度从12.9 μA·cm−2降低到7.63 μA·cm−2，同时有效地抑制了高温下的氧化。此外，磁电协同效应和核壳结构中丰富的非均质界面显著优化了阻抗匹配，增强了极化损耗和多重散射效应。结果表明，在厚度为1.6 mm时，复合材料的有效吸收带宽（EAB）为8.04 GHz，最小反射损耗（RLmin）为- 63.37 dB。在500℃下保持了良好的吸收稳定性，在x波段的EAB为2.57 GHz， RLmin为−18.65 dB。本研究证明了通过核壳结构设计可协同提高耐腐蚀性能和微波吸收性能，为开发恶劣环境下多功能微波吸收器提供了理论见解和技术指导。

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引用次数: 0

Structural characterisation and failure mechanisms of high-performance marine stringers in out-of-plane bending loads 船用高性能弦板在面外弯曲载荷下的结构特征及破坏机制

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-08 DOI: 10.1016/j.compstruct.2026.120054

Connor Pearson , Mark Battley , John Little , Guillaume Verdier , Tom Allen

Hat stringers are structural components that stiffen and strengthen composite hull panels of high-performance racing yachts. The failure mechanisms of stringer structures are complex, and the relationships between geometric parameters and failure modes are not well understood. This is due to a lack of experimental validation resulting from the cost and complexity in experimentally testing as-designed and in-service load cases. This leads to the reliance on experiential knowledge and coupon data. Experiments based on a 3-point bend provide an alternate method to the testing of full panels to determine structural behaviour and failure mechanisms This can be used to validate designs and better inform design choices. In this work, the structural performance of shear- and bending-dominated marine omega stringer structures are characterised experimentally and numerically under 3-point bending to understand strain states under load, failure mechanisms, and the validity of coupon data when designing complex composite structures. Strain state predictions from the numerical model are well-validated at proof loads, while comparisons at failure are complicated by stochastic laminate defects, geometric features, and discrepancies in predicting based on coupon data. The results of this study highlight the differences between as-designed and actual strengths in marine stringer structures.

帽桁是用于加强高性能赛艇复合船体板的结构部件。弦杆结构的破坏机理复杂，几何参数与破坏模式之间的关系尚不清楚。这是因为缺乏实验验证，这是由于实验测试按设计和在役负载情况的成本和复杂性造成的。这导致了对经验知识和优惠券数据的依赖。基于三点弯曲的实验提供了一种替代全板测试的方法来确定结构行为和破坏机制，这可以用来验证设计并更好地为设计选择提供信息。在这项工作中，以剪切和弯曲为主导的海洋欧米茄弦结构在三点弯曲下的结构性能进行了实验和数值表征，以了解载荷下的应变状态，破坏机制，以及在设计复杂复合结构时联片数据的有效性。数值模型的应变状态预测在验证荷载下得到了很好的验证，而在破坏时的比较由于随机层压缺陷、几何特征和基于优惠券数据预测的差异而变得复杂。本研究的结果突出了设计强度与实际强度之间的差异。

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引用次数: 0

Integrated multiscale modelling strategy for shape-memory polymer nanocomposites: Linking surface chemistry-driven filler distribution to macroscopic properties 形状记忆聚合物纳米复合材料的集成多尺度建模策略：将表面化学驱动的填料分布与宏观性能联系起来

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-08 DOI: 10.1016/j.compstruct.2026.120045

Sungwoo Park , Jeong-ha Lee , Maenghyo Cho , Yun Seog Lee , Seunghwa Yang

Obtaining uniform nanoparticle dispersion in polymer matrices is essential for multifunctional properties of shape-memory polymer (SMP) nanocomposites. However, existing computational approaches do not completely account for the effects of nanoparticle surface treatment on nanoparticle dispersion and the impact of this dispersion on nanocomposite properties. This work presents an integrated multiscale modelling framework combining all-atom molecular dynamics (MD), dissipative particle dynamics (DPD), and finite element (FE) homogenization to connect nanoparticle surface chemistry, filler distribution, interphase structure, and macroscopic properties of shape-memory polyurethane (SMPU) nanocomposites. Solubility parameters and mixing energies of SMPU segments and silica nanoparticles were obtained from MD simulations to evaluate surface treatment effects on dispersion. These results informed Flory–Huggins parameters for DPD, enabling quantification of nanoparticle clustering as a function of hard-segment content (HSC) and nanoparticle loading. Based on this methodology, a framework was developed to predict optimal surface treatments for enhanced nanoparticle dispersion. DPD-driven nanocomposite morphologies were then integrated with FE homogenization to estimate mechanical properties. The methodology was further applied to nanocomposites with non-spherical fillers, demonstrating prediction of mechanical performance of cylindrical nanoparticle-reinforced systems as a function of HSC and surface treatment. This approach provides a versatile computational tool for guiding nanocomposite design and optimization.

形状记忆聚合物（SMP）纳米复合材料的多功能性能需要在聚合物基体中获得均匀的纳米颗粒分散。然而，现有的计算方法并没有完全考虑纳米颗粒表面处理对纳米颗粒分散的影响以及这种分散对纳米复合材料性能的影响。本研究提出了一个集成的多尺度建模框架，结合了全原子分子动力学（MD）、耗散粒子动力学（DPD）和有限元（FE）均质化，以连接纳米颗粒表面化学、填料分布、相间结构和形状记忆聚氨酯（SMPU）纳米复合材料的宏观性能。通过MD模拟得到SMPU片段和二氧化硅纳米颗粒的溶解度参数和混合能，以评价表面处理对分散的影响。这些结果为DPD的Flory-Huggins参数提供了信息，从而可以定量纳米颗粒聚类作为硬段含量（HSC）和纳米颗粒负载的函数。基于这种方法，开发了一个框架来预测增强纳米颗粒分散的最佳表面处理。然后将dpd驱动的纳米复合材料形貌与FE均匀化相结合，以估计其力学性能。该方法进一步应用于非球形填充的纳米复合材料，证明了圆柱形纳米颗粒增强体系的力学性能预测是HSC和表面处理的函数。这种方法为指导纳米复合材料的设计和优化提供了一种通用的计算工具。

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引用次数: 0

Predicting failure in injection-moulded short-fibre components through fracture mechanics and fractographic validation 通过断裂力学和断口学验证预测注射成型短纤维部件的失效

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-08 DOI: 10.1016/j.compstruct.2026.120053

Yuki Fujita , Wisely Yeung , Shunta Kimura , Satoshi Noda , Junichi Takahashi , Emile S. Greenhalgh , Soraia Pimenta

Injection-moulded short-fibre composites are lightweight materials suitable for high-volume applications. When designing components, it is necessary to predict their ultimate load-bearing capability using Finite Element simulations. However, current methods (based on initiation failure criteria) to simulate components using these materials cannot yet accurately predict ultimate failure. This work applies a newly developed methodology – using a Cohesive Zone Modelling (CZM) to account for the material’s finite toughness – to predict failure of injection-moulded short-glass-fibre reinforced thermoplastic (IM-SFRP) components, based on experimentally measured properties at coupon level. An automotive component, selected from realistic applications in the automotive industry, was tested under quasi-static conditions, and fracture occurred either (i) around the loading area, or (ii) at a weldline. FE simulations of the components, coupled with fibre orientation fields predicted by an injection-moulding process simulation, combined with CZM, were conducted; this used properties measured using dogbone-coupon tensile tests and compact tension tests. These coupled simulations presented excellent agreement with the experimental results in terms of both (a) the peak load (within 2.3% error), and (b) the post-peak sequence of failure events (verified using fractographic analyses). The methodology used in this research can be used to confidently design safer and more efficient IM-SFRP components.

注射成型短纤维复合材料是一种轻质材料，适合大批量应用。在设计构件时，有必要利用有限元模拟对构件的极限承载能力进行预测。然而，目前使用这些材料模拟部件的方法（基于起始失效准则）还不能准确预测最终失效。这项工作应用了一种新开发的方法-使用内聚区建模（CZM）来解释材料的有限韧性-根据实验测量的材料性能来预测注射成型短玻璃纤维增强热塑性塑料（IM-SFRP）部件的失效。从汽车工业的实际应用中选择一个汽车部件，在准静态条件下进行测试，断裂发生在(i)加载区周围或（ii）焊接线上。对零件进行了有限元模拟，结合注射成型过程模拟预测的纤维取向场，结合CZM进行了有限元模拟；该方法使用狗骨接头拉伸试验和致密拉伸试验来测量性能。这些耦合模拟在(a)峰值载荷（误差在2.3%以内）和(b)峰后失效事件序列（通过断口分析验证）方面与实验结果非常吻合。本研究中使用的方法可用于自信地设计更安全，更有效的IM-SFRP组件。

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引用次数: 0

Bond behavior between surface-treated 3D-printed FRP bars and concrete 表面处理的3d打印FRP筋与混凝土之间的粘结行为

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-08 DOI: 10.1016/j.compstruct.2026.120051

Zi-Tong Yan , Xianwen Hu , Jie-Kai Zhou , Yan Zhuge , Jun-Jie Zeng

Fiber-reinforced polymer (FRP) bars have been widely adopted as internal reinforcement for concrete structures, however, the conventional pultrusion fabrication process imposes limitations including reliance on molds and material waste. To address these issues, an innovative form of 3D-printed FRP (3DP-FRP) reinforcing bars based on additive manufacturing has recently been developed by the authors. In this study, a novel surface treatment for 3DP-FRP bars using serrated cross-section and sand coating is developed to enhance the bar-concrete interfacial bond performance. A total of 33 pull-out tests were performed to systematically investigate the effects of surface treatment methods, concrete strength, anchorage length, and bar diameter on the bond behavior of 3DP-FRP bars in concrete. Results show that untreated 3DP-FRP bars achieve a bond strength (the maximum average shear stress along the bonded length) of up to 7.3 MPa, markedly exceeding that of smooth pultruded bars. The bond strength increases with concrete strength but decreases with a greater anchorage length or bar diameter. The bars with a helical wrap and coarse sand coating (HWCS) exhibit the highest bond strength. Furthermore, the applicability of the modified BPE (mBPE) model for bond-slip characterization of 3DP-FRP bars is validated, and a new predictive equation for bond strength estimation is proposed.

纤维增强聚合物（FRP）棒已被广泛应用于混凝土结构的内部加固，然而，传统的拉挤制造工艺存在局限，包括对模具的依赖和材料的浪费。为了解决这些问题，作者最近开发了一种基于增材制造的3d打印FRP （3d -FRP）钢筋的创新形式。在本研究中，开发了一种新型的3d - frp筋表面处理方法，采用锯齿形截面和砂涂层来提高钢筋与混凝土的界面结合性能。共进行了33次拔出试验，系统地研究了表面处理方法、混凝土强度、锚固长度和杆径对3d - frp筋在混凝土中的粘结行为的影响。结果表明：未经处理的3d - frp筋的粘结强度（沿粘结长度的最大平均剪应力）可达7.3 MPa，明显超过光滑拉伸筋；粘结强度随混凝土强度的增大而增大，但随锚固长度或锚杆直径的增大而减小。螺旋缠绕和粗砂涂层（HWCS）的棒材表现出最高的结合强度。验证了改进的BPE （mBPE）模型在3d - frp筋粘结滑移表征中的适用性，并提出了一种新的粘结强度预测方程。

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引用次数: 0

Temperature-dependent failure behavior and lay-up optimization of CFRP layers in Type IV hydrogen storage vessels IV型储氢容器CFRP层的温度失效行为及铺层优化

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-08 DOI: 10.1016/j.compstruct.2026.120048

Y.T. Li , W.J. Huang , Y.M. Zhang , Z.M. Xiao , W.G. Li

Type IV hydrogen storage vessels are critical for hydrogen-powered vehicles due to their lightweight nature and high energy density. However, their performance is limited by failure in the outer carbon fiber-reinforced polymer (CFRP) layers under varying ambient temperatures ranging from −30 °C to 60 °C. This study has developed a full-scale finite element model to investigate the mechanical response and initial failure pressure of these vessels under thermal variations. A 3D representative volume element model was used to derive temperature-dependent material parameters that capture the thermo-mechanical behaviors of the epoxy matrix and fiber–matrix interface. Three lay-up sequences were compared to optimize structural performance. Results indicate that the dome region consistently experiences the highest stress concentrations. The initial failure pressure increases by 5.8% at −30 °C and decreases by 6.3% at 60 °C, relative to room temperature. The helical/hoop separated lay-up exhibits the superior load-bearing capacity, outperforming the hoop/helical configuration by 10.7%. These findings provide valuable insights for optimizing hydrogen storage vessel design against thermal degradation.

IV型储氢容器由于其重量轻、能量密度高，对氢动力汽车至关重要。然而，它们的性能受到外部碳纤维增强聚合物（CFRP）层在- 30°C至60°C的环境温度下失效的限制。本研究建立了一个全尺寸有限元模型来研究这些容器在热变化下的力学响应和初始失效压力。采用具有代表性的三维体积元模型推导出与温度相关的材料参数，这些参数捕获了环氧树脂基体和纤维-基体界面的热力学行为。对比了三种铺层结构，优化了结构性能。结果表明，穹顶区域始终经历最高的应力集中。与室温相比，- 30℃时初始失效压力升高5.8%，60℃时降低6.3%。螺旋/环形分离层的承载能力优于环形/螺旋结构的承载能力10.7%。这些发现为优化储氢容器的热降解设计提供了有价值的见解。

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引用次数: 0

Steering for in-situ AFP-manufactured structures: Part 2 - Optimized layup strategy 原位afp制造结构的转向：第2部分-优化布局策略

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-08 DOI: 10.1016/j.compstruct.2025.120024

Lukas Raps, Ashley R. Chadwick, Yannick Schäfer, Heinz F. Voggenreiter

Thermoplastic Automated Fiber Placement (AFP) steering enables the fabrication of complex curved structures, but requires careful control of tape geometry to avoid defects. This paper details a methodology for constant curvature steering based on an empirical model characterizing tape deformation during in-situ AFP. A corresponding path planning algorithm leverages this model to generate defect-free steered plies. The approach was experimentally validated for both half-inch and quarter-inch tapes, demonstrating robustness across different process parameters and material combinations. Results show that quarter-inch tape offers a wider design space for steering applications than half-inch tape. By combining the critical arc length concept introduced in Part 1 of this work with steering-optimized path planning, this paper establishes a framework for process-optimized layup strategies to manufacture high-quality in in-situ AFP structures.

热塑性自动纤维放置（AFP）转向可以制造复杂的弯曲结构，但需要仔细控制胶带的几何形状以避免缺陷。本文详细介绍了一种基于原位AFP过程中胶带变形的经验模型的恒曲率转向方法。相应的路径规划算法利用该模型生成无缺陷的导向层。该方法在半英寸和四分之一英寸胶带上进行了实验验证，证明了该方法在不同工艺参数和材料组合中的稳健性。结果表明，四分之一英寸胶带比半英寸胶带为转向应用提供了更宽的设计空间。通过将第1部分介绍的临界弧长概念与转向优化路径规划相结合，本文建立了工艺优化布局策略框架，以制造高质量的原位AFP结构。

引用次数: 0

Novel design and synergistic deformation mechanism of 3D-printed bridging-type composite pyramid lattice structure with mechanical interlocking 具有机械联锁的3d打印桥式复合金字塔晶格结构的新设计及其协同变形机理

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures

Pub Date : 2026-01-08 DOI: 10.1016/j.compstruct.2026.120049

Hongyong Jiang , Jian Tang , Long Zhang , Yangyu Liu , Weimin Zhang

The traditional composite pyramid lattice structures are susceptible to asymmetric deformation failures, such as buckling, fracture and delamination due to structural and manufacturing defects. Thus, this study concentrates on a novel design methodology for the assembled composite pyramid lattice, aiming to elucidate the synergistic deformation mechanism. Both bridging-link rod and bridging-type truss are designed to form a bridging-type pyramid lattice with robust mechanical interlocking. Continuous-fiber 3D-printing and modular assembly technology are adopted to fabricate samples with intricate topologies. Crushing tests, along with homogenized and meso-scale finite element modeling, are conducted to assess the crushing behaviors and failure mechanisms, showing consistent results. The findings demonstrate that (carbon-fiber) bridging-type-II pyramid lattice has 70% higher average load and 72% higher energy-absorption. An investigation into the correlation between manufacturing defects and size reveals significant impacts, attributed to the constraints of continuous fiber 3D-printing. Crucially, the mechanisms by which the bridging-link rod and truss contribute to the synergistic deformation of lattice are revealed, encompassing bridging-link rod constraint, mechanical interlocking and carbon-fiber reinforcement. Ultimately, the simulation-based elucidation for effect of principal parameters, including slant angle, location of bridging-type truss and thickness of bridging-link rod, reveals their considerable influence.

由于结构缺陷和制造缺陷，传统的复合材料金字塔晶格结构容易发生屈曲、断裂和分层等不对称变形破坏。因此，本研究集中在一种新的设计方法的组装复合材料金字塔晶格，旨在阐明协同变形机制。桥杆和桥式桁架均设计成具有牢固机械联锁的桥式金字塔格。采用连续纤维3d打印和模块化组装技术，制造具有复杂拓扑结构的样品。通过破碎试验，以及均质和中尺度有限元模拟，对破碎行为和破坏机制进行了评估，得出了一致的结果。结果表明，（碳纤维）桥接型金字塔晶格的平均荷载提高70%，吸能提高72%。对制造缺陷和尺寸之间相关性的调查揭示了由于连续纤维3d打印的限制而产生的重大影响。至关重要的是，揭示了桥杆和桁架促进晶格协同变形的机制，包括桥杆约束、机械联锁和碳纤维增强。最后，通过仿真对斜角、桥式桁架位置和桥杆厚度等主要参数的影响进行了分析，揭示了它们的重要影响。

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引用次数: 0