【标题】Experimental Analysis on Machining Properties of Aluminum Hybrid Composite Materials
【参考中译】铝混杂复合材料加工性能的实验分析
【类型】 期刊
【关键词】 Aluminum hybrid metal matrix composites; Stir casting; Die sinking electric discharge machining; Design of experiments; Analysis of variance (ANOVA); Multi response optimization
【参考中译】 铝混杂金属基复合材料；搅拌铸造；模具电火花加工；试验设计；方差分析；多响应优化
【作者】 Hari Baalaaji RA; Balasubramanian K; Soundararajan R
【摘要】 Hybrid Composite materials meet a major demand in current industrial market through mixture of various percentages of metal compositions at different levels. One such material, which is most widely employed, is aluminum. Aluminum hybrid metal matrix composites is substituted with conventional alloys in order to meet the rigid, high-end requirements at major industries. In this work, it is reinforced with Aluminum-Tungsten Carbide-Graphite composite and fabricated using the stir casting process. Die sinking electric discharge machining (EDM) process is preferred over conventional process for the purpose of machining complex shaped materials with accuracy. The optimization of minimizing surface roughness and maximize material removal rate is essential to increase the effective and efficient usage of hybrid composites. In this experimental work, the sensitivity of various parameters of EDM on the output responses is found using Taguchi experimental design, Multi response optimization and Analysis of variance (ANOVA) to generate the mathematical model. From the experiment, it is found that %WC = 6%,%Gr = 3%, I= 5A, V=50V, T_(OFF)=50μs, is the most optimal value among others due to its meta stable bonding in improving the machining parameters to achieve optimization of minimizing surface roughness and maximizing material removal rate.
【参考中译】 混杂复合材料通过在不同层次混合不同比例的金属成分来满足当前工业市场的主要需求。其中一种应用最广泛的材料是铝。铝混杂金属基复合材料被传统合金取代，以满足主要行业对刚性、高端化的要求。本文以铝-碳化钨-石墨复合材料为增强材料，采用搅拌铸造法对其进行了制备。对于复杂形状材料的精密加工，电火花加工是一种优于传统加工工艺的加工方法。优化混杂复合材料的表面粗糙度和最大材料去除率是提高混杂复合材料有效利用率的关键。在本实验工作中，利用田口实验设计、多响应优化和方差分析(ANOVA)建立数学模型，得到了电火花加工各参数对输出响应的敏感性。实验结果表明，%WC=6%，%Gr=3%，I=5A，V=50V，T_(Off)=50μS是最优的工艺参数，这是因为它能改善加工参数，达到最小表面粗糙度和最大材料去除效率的最佳值。
【来源】 SAE International Journal of Advances and Current Practices in Mobility 2023, vol.5, no.4
【入库时间】 2023/10/31
【标题】Polypropylene Composite Material for Light Weight Fuel Tank Protection Shield
【参考中译】轻型油箱防护罩用聚丙烯复合材料
【作者】 Karthik Govindaraj; V Jayashankar; Karthiban C
【摘要】 The fuel tank shield provides a protective boundary between the fuel tank and vehicle driveline in the event of a high-speed crash. Hence, it is important from the safety standpoint. The part must be carefully engineered to meet the challenging requirements in terms of stiffness, deflection, toughness, dimensional stability and thermal stability. In this paper, long glass fibre filled polypropylene material compound was selected and developed to meet the mentioned requirements for this part with significant mass reduction over other materials. The combination of material, optimized part and tool design led to weight savings and considerable cost reduction. This is a ready to mold material used in injection molding process. This long glass fibre reinforced polypropylene compound has been explored for thin wall protection shield with wall thickness of 2.5 mm. This part has critical functional requirements such as driveline load versus deflection durability criteria, thermal stability, dimensional stability to overcome fouling and rattling with respect to interface parts, torque retention in mounting zones, gap and flush aspects. Structural durability of the design was validated by virtual engineering. Part design and material combinations with better tooling design iterations were analyzed by using mold flow analysis. Complete product performance was validated for predefined key test metrics such as structural durability, thermal aging, natural frequency, impact and torque retention. This part met the requirements. The combination of material, optimized part and tool design led to weight savings, balanced stiffness and toughness behavior, dimensional stability, and considerable cost reduction.
【参考中译】 在发生高速碰撞时，油箱防护罩在油箱和车辆传动系之间提供了保护边界。因此，从安全的角度来看，这一点很重要。零件必须经过精心设计，以满足在硬度、挠度、韧性、尺寸稳定性和热稳定性方面具有挑战性的要求。本文选择和开发了长玻璃纤维填充聚丙烯材料复合材料，以满足该零件的上述要求，并显著减轻了其他材料的质量。材料、优化的零件和工具设计相结合，从而节省了重量并显著降低了成本。这是一种用于注塑成型过程的现成模具材料。这种长玻璃纤维增强聚丙烯复合材料已被探索用于壁厚为2.5 mm的薄壁防护。该部件具有关键的功能要求，例如传动系负载与挠度的耐久性标准、热稳定性、尺寸稳定性以克服接口部件的污垢和卡壳、安装区域中的扭矩保持、间隙和平齐方面。通过虚拟工程对设计的结构耐久性进行了验证。通过模具流动分析，对模具设计迭代次数较好的零件设计和材料组合进行了分析。完整的产品性能根据预定义的关键测试指标进行了验证，例如结构耐久性、热老化、固有频率、冲击和扭矩保持。这部分符合要求。材料、优化的零件和工具设计相结合，节省了重量，平衡了刚性和韧性行为，尺寸稳定，并显著降低了成本。
【来源】 SAE International Journal of Advances and Current Practices in Mobility 2023, vol.5, no.2
【标题】A hybrid multi-stage decision-making method with probabilistic interval-valued hesitant fuzzy set for 3D printed composite material selection
【参考中译】3D打印复合材料选材的概率区间值犹豫模糊集混合多阶段决策方法
【关键词】 Composite material selection; Harsh environment; PIVHFS; Shapley value; Multiple-criteria decision making; TODIM-TOPSIS
【参考中译】 复合材料选择；恶劣环境；PIVHFS；Shapley值；多准则决策；TODIM-TOPSIS
【作者】 Guoquan Xie; Kui Wang; Xuan Wu; Jin Wang; Tao Li; Yong Peng; Honghao Zhang
【摘要】 The 3D printed composite material selection is of great interest due to its extensive application prospect and can be considered as a challenging multiple-criteria decision making (MCDM) issue. The hesitation and uncertainty of experts are difficult to measure, and the high degree of interaction among criteria is often overlooked in the decision process. In addition, composites are required to serve in harsh environments for various mechanical and industrial fields, resulting in the degradation of mechanical properties. In this study, a hybrid multi-stage decision-making method is developed to conduct 3D printed composite material selection in harsh environments. The theory of probabilistic interval-valued hesitant fuzzy set (PIVHFS) is proposed to characterize the decision-making information of experts, which can effectively quantify the assessment in uncertain environments. An integrated method that combines Choquet fuzzy integral and Shapley value is proposed to obtain the weight vector of criteria, which can reflect the mutual influence between criteria and their overall importance. The final decision-making result and the optimal alternative can be calculated by the PIVHFS-based Tomada de Decisao Interativa Multicriterio and Technique for order preference by similarity to an ideal solution (TODIM-TOPSIS) method. An empirical application, i.e., 3D printed composites in the background of automotive chassis, is applied to validate the application of the proposed method. Comparative analysis, sensitivity analysis, and managerial implications are also conducted to illustrate the validity of the method. This paper provides a valuable tool for addressing the material selection issue of 3D printed composites from a multi-criteria perspective.
【参考中译】 三维打印复合材料的选择因其广泛的应用前景而备受关注，是一个具有挑战性的多准则决策问题。专家的犹豫不决和不确定性很难衡量，标准之间的高度互动在决策过程中往往被忽视。此外，复合材料需要在各种机械和工业领域的恶劣环境中使用，从而导致力学性能的退化。本文提出了一种混合多阶段决策方法，用于在恶劣环境下进行3D打印复合材料的选择。提出了概率区间值犹豫模糊集(PIVHFS)理论来刻画专家的决策信息，能够有效地对不确定环境下的评估进行量化。提出了一种将Choquite模糊积分与Shapley值相结合的综合评价指标权重向量的方法，该方法能够反映评价指标之间的相互影响及其整体重要性。最后的决策结果和最优方案可以通过基于PIVHFS的Tomada de Decisao Interativa Multicriterio和相似于理想解的排序优先技术(TODIM-TOPSIS)来计算。以汽车底盘为背景的3D打印复合材料为例，验证了该方法的有效性。通过比较分析、敏感性分析和管理启示，说明了该方法的有效性。本文为从多准则的角度解决3D打印复合材料的选材问题提供了有价值的工具。
【来源】 Engineering Applications of Artificial Intelligence 2023, vol.123, no.Pt.C