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高性能复合材料弯曲疲劳性能研究 总被引:3,自引:0,他引:3
用湿法缠绕技术制作了CF/5228预浸料,对热压罐固化的CF/5228复合材料的力学性能和弯曲疲劳性能进行了研究,并用扫描电镜、电子显微镜等对复合材料的疲劳损伤机理进行了微观表征和理论探讨。研究表明,M40J/5228复合材料比M40/5228具有更为优异的耐疲劳性能。复合材料的疲劳损伤主要有纤维断裂、基体开裂和界面剪切破坏3种表现形式,通常复合材料构件的疲劳破坏多为3种形式的综合表现。基体增韧、选用高强高模碳纤维、界面强化和铺层优化是提高复合材料构件耐疲劳性能有效手段。 相似文献
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用湿法缠绕技术制作了CF/5228预浸料,对热压罐固化的CF/5228复合材料的室温、高温干态和湿态力学性能进行了研究。与其它复合材料相比,M40J/5228复合材料的各项力学性能均有很大程度的提高,且具有优异的耐湿热性能,在130℃干态和湿态下,其弯曲强度、模量和层间剪切强度的保持率较高。 相似文献
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主要研究了低成本树脂膜熔渗工艺(RFI)5228A高温环氧树脂和标准5228A环氧树脂的粘温性能和制膜性能,然后将RFI专用5228A/CCF300复合材料的力学性能与标准5228A/CCF300的力学性能进行对比。研究结果表明,经过对标准5228A环氧树脂的配方进行适当的调整而制成的RFI专用5228A树脂的粘温性能及制膜性能能够满足RFI工艺要求。其浸渍工艺为120~130℃,工艺期为60min,RFI专用5228A/CCF300碳纤维复合材料的力学性能值的批次稳定性好且与标准5228A/CCF300复合材料相当。 相似文献
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固相法改性纳米碳酸钙对丁苯橡胶的补强作用 总被引:1,自引:0,他引:1
研究了用带有酚醛结构的反应性有机改性剂对纳米碳酸钙进行固相改性得到的M—CaCO3填充丁苯橡胶(SBR)所得复合材料的力学性能、热稳定性能、微观形态和老化性能.并与丁苯橡胶/硬脂酸包覆型纳米碳酸钙(CCR)复合材料的性能进行比较。结果表明,M—CaCO3对SBR力学性能和热稳定性能的提高比CCR更显著,且M—CaCO3能改善SBR的老化性能。电镜观察表明,M—CaCO3在SBR中的分散性优于CCR.且界面结合形态得到了改善。M—CaCO3添加量为20~40份时。复合材料综合力学性能最好。 相似文献
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采用双螺杆挤出机制备了一系列聚丙烯(PP)/木粉/纳米凹凸棒土(AT)木塑复合材料(WPC.研究了AT用量对复合材料力学性能、热性能、加工性能的影响.结果表明,随着AT用量的增加,复合材料拉伸强度逐渐增加、冲击强度逐渐减小,硬度先增加后减小,AT用量为5份时复合材料硬度最大;复合材料维卡软化点不断提高;熔体流动速率(M... 相似文献
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用十二烷基二甲基苄基氯化铵对累托石进行有机化处理,采用不同量的有机累托石与环氧树脂进行原位插层聚合,制得环氧树脂/有机累托石纳米复合材料,采用红外光谱分析、X射线衍射分析、扫描电镜分析、差示扫描量热分析和力学性能测试研究了有机累托石在环氧树脂中的分散性、纳米复合材料的力学性能和热性能。结果表明,有机累托石含量为3份时纳米复合材料的综合性能最佳,冲击强度和弯曲强度分别提高40%和33%;热变形温度和玻璃化转变温度分别提高30℃和11.5℃;而其热稳定性与纳米累托石粒子的分布和界面作用有关。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%. 相似文献
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塔设备改造选型的分析 总被引:2,自引:0,他引:2
就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后,着重介绍一种新型塔板(导向梯形浮阀塔板)和一种新型填料(波环填料——乾隆帕克)。 相似文献