interpenetrating phase composites

互穿相复合材料
  • 文章类型: Journal Article
    聚对苯二甲酸乙二醇酯(PET)的回收利用是最重要的环境问题之一,确保更清洁的环境,减少技术产品的碳足迹,考虑到逐年使用的数量。回收的可能性取决于收集的材料的质量和目标产品。当前的研究旨在通过以创新的方式将回收的PET放在一起作为添加剂制造的金属晶格结构的填料来增加回收量。从上面提到的结构开始,创造了一系列新的复合材料:IPC(互穿相复合材料),具有复杂结构的材料,其中固相,加固,与另一个阶段唯一地结合在一起,加热到熔化的温度。使用SolidWorks通过两个环的交点对晶格结构进行建模,产生晶格结构,由316L不锈钢通过增材制造技术进一步生产。压缩强度显示低值的回收PET,约26兆帕,而不锈钢晶格结构约为47MPa。再循环的PET模制到晶格结构中增加了其在53MPa下的压缩强度。杨氏模量受回收PET增强的影响,从裸露晶格结构的约1400MPa增加到增强结构的约1750MPa。这维持了这样的想法,即回收的PET由于其优异的杨氏模量约为1570MPa而改善了复合材料的弹性行为,与不锈钢晶格结构协同作用。用SEM显微镜研究了形态学,揭示了回收PET与316L表面的结合能力,确保连贯的复合材料。还使用SEM显微镜研究了故障,揭示了微观结构的不均匀性可以作为局部张量,这促进了局部去层内的界面破坏,从而削弱了复合材料,它终于打破了。
    Polyethylene terephthalate (PET) recycling is one of the most important environmental issues, assuring a cleaner environment and reducing the carbon footprint of technological products, taking into account the quantities used year by year. The recycling possibilities depend on the quality of the collected material and on the targeted product. Current research aims to increase recycling quantities by putting together recycled PET in an innovative way as a filler for the additive manufactured metallic lattice structure. Starting from the structures mentioned above, a new range of composite materials was created: IPC (interpenetrating phase composites), materials with a complex architecture in which a solid phase, the reinforcement, is uniquely combined with the other phase, heated to the temperature of melting. The lattice structure was modeled by the intersection of two rings using Solid Works, which generates the lattice structure, which was further produced by an additive manufacturing technique from 316L stainless steel. The compressive strength shows low values for recycled PET, of about 26 MPa, while the stainless-steel lattice structure has about 47 MPa. Recycled PET molding into the lattice structure increases its compressive strength at 53 MPa. The Young\'s moduli are influenced by the recycled PET reinforcement by an increase from about 1400 MPa for the bare lattice structure to about 1750 MPa for the reinforced structure. This sustains the idea that recycled PET improves the composite elastic behavior due to its superior Young\'s modulus of about 1570 MPa, acting synergically with the stainless-steel lattice structure. The morphology was investigated with SEM microscopy, revealing the binding ability of recycled PET to the 316L surface, assuring a coherent composite. The failure was also investigated using SEM microscopy, revealing that the microstructural unevenness may act as a local tensor, which promotes the interfacial failure within local de-laminations that weakens the composite, which finally breaks.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    泡沫金属/环氧互穿相复合材料是一种新型的复合材料,在成分上具有互穿连续性,在拉伸和压缩的不同应力状态下表现出不同的内在关系,有必要深入研究拉伸状态下的内在关系。建立了基于细观损伤的拉伸本构模型,基于小变形理论和总应变理论,推导了代表性体积元的弹塑性拉伸本构方程,以及等应力和等应变的假设。测量了三种不同尺寸的镍铁泡沫/环氧树脂互穿相复合材料及其组成相的拉伸强度,结果表明,高强度泡沫金属和环氧树脂的三维网络互穿复合材料在材料内部形成了一个弱表面,并且没有显着提高复合材料的拉伸强度。用反演方法预测了镍铁泡沫/环氧互穿相复合材料的拉伸瞬时方程和损伤瞬时方程,通过与实测结果的对比,验证了拉伸本构模型的适用性和较高的准确性。
    Foam metal/epoxy interpenetrating phase composite is a new type of composite material with interpenetrating continuity in composition, which exhibits different intrinsic relationships under different stress states in tension and compression, and it is necessary to study the intrinsic relationships in the tensile state in depth. A mesoscopic damage-based tensile intrinsic model is developed, and the elasto-plastic tensile intrinsic equations of the representative volume element are derived based on small deformation theory and total strain theory, as well as the assumptions of equal stress and equal strain. The tensile strengths of nickel-iron foam/epoxy interpenetrated phase composites in three different sizes and their constituent phases were measured, and it was shown in the results that the composite of three-dimensional network interpenetration with high-strength foam metal and epoxy resin formed a weak surface inside the material, and did not significantly improve the tensile strength of the composites. The tensile instantonal equations and damage instantonal equations of nickel-iron foam/epoxy interpenetrated phase composites were predicted by the method of inversion, and the applicability and high accuracy of the tensile intrinsic model were verified in comparison with the measured results.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    The paper presents the experimental results of static and dynamic compressive tests conducted on ceramic-elastomer composites. The alumina ceramic preforms were fabricated by the four-step method: ceramic mixture preparation, consolidation under pressure, presintering, and sintering under pressure, respectively. To obtain ceramic preforms with a similar volume fraction of open pores, but with different pore sizes, alumina powder with different particle size and a ceramic binder were used, as well as pore-forming agents that were evenly distributed throughout the volume of the molding mass. The composites were obtained using vacuum pressure infiltration of porous alumina ceramic by urea-urethane elastomer in liquid form. As a result, the obtained composites were characterized by two phases that interpenetrated three-dimensionally and topologically throughout the microstructure. The microstructure of the ceramic preforms was revealed by X-ray tomography, which indicated that the alumina preforms had similar porosity of approximately 40% vol. but different pore diameter in the range of 6 to 34 µm. After composite fabrication, image analysis was carried out. Due to the microstructure of the ceramic preforms, the composites differed in the specific surface fraction of the interphase boundaries (Sv). The highest value of the Sv parameter was achieved for composite fabricated by infiltration method of using ceramic preform with the smallest pore size. Static and dynamic tests were carried out using different strain rate: 1.4·10-3, 7·10-2, 1.4·10-1, and 3·103 s-1. Compressive strength, stress at plateau zone, and absorbed energy were determined. It was found that the ceramic-elastomer composites\' ability to absorb energy depended on the specific surface fraction of the interphase boundaries and achieved a value between 15.3 MJ/m3 in static test and 51.1 MJ/m3 for dynamic strain rate.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    The damage process and failure mechanisms were analyzed by a series of quasi-static compressive experiments of seven materials including pure epoxy (EP), three different PPI (pores per linear inch) foam nickel-iron, and three different PPI foam nickel/iron-epoxy interpenetrating phase composites (IPC). Plotting the stress-strain curves of different materials, their change rules are discussed, then the effective elastic modulus and yield limit of the materials are provided, and the energy absorption properties of different materials are analyzed by the stress-strain curves. It was found that the effective elastic modulus and specific stiffness of the three IPC materials were higher than pure foam nickel-iron. The brittleness of epoxy can be obviously changed by selecting a suitable PPI foam nickel-iron composited with it. The unit volume energy absorption rate of foam nickel/iron-epoxy was significantly higher than pure epoxy and pure foam nickel-iron. It was also found that the energy absorption rate decreased with the increase in PPI. The stress relaxation rate decreased first and then increased with the increase in PPI. The creep behavior of the three composites was obvious in the creep elastic stage, and the creep rate increased with the increase in PPI. The creep rate decreased with the increase in PPI in the creep transition stage.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Sci-hub)

       PDF(Pubmed)

公众号