共查询到19条相似文献,搜索用时 156 毫秒
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采用拉挤和模压成型工艺制备了碳纤维(CF)增强塑料(CFRP)弹簧,采用CF布包裹工艺对弹簧进行了强化。使用微机控制电液伺服万能试验机对弹簧进行了静态压缩实验,使用扫描电子显微镜(SEM)对实验弹簧裂纹处微观形貌进行了观察分析,运用理论模型对实验结果进行了验证。研究表明,CF布是很好的补强材料,可以在不明显增大CFRP弹簧尺寸、质量的情况下,通过包裹强化工艺有效地提高弹簧的刚度。CF布包裹角度对CFRP弹簧刚度的影响很大,其中90°CF布包裹工艺最优,CFRP弹簧刚度达到11.78×103 N/m,较未包裹强化CFRP弹簧刚度提升了164.7%。通过理论模型计算发现,实际实验结果偏低,表明减小拉挤过程中CF布包裹角度的偏移量,是CF布能充分发挥强化作用的关键因素。 相似文献
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J. R. Defife 《乙烯基与添加剂工艺杂志》1980,2(4):222-226
The ability of a PVC plastisol to liberate entrapped air during mixing and processing is an important factor to the processors. This property, known as air release, is affected by several variables such as resin, plastisol viscosity, surface tension, surfactant system and plasticizer type. A study was conducted to obtain a more fundamental understanding of the effects of these variables on air release. Complicating the accurate study of a plastisol's air release properties is the fact that current test procedures such as the vacuum rise, syringe test and Huff or ring test each have limitations imposed by either plastisol properties or by testing technique. Any one of these procedures alone may not adequately measure air release. This paper, in addition to studying the factors affecting air release, discusses these testing limitations and makes recommendations as to the best methods for evaluating air release properties in the laboratory. 相似文献
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New methods for testing air springs have received a lot of interest in recent years. In this article APDL (ANSYS parametric design language) was utilized to simulate static and dynamic test process of air springs. In the simulation, multiple load steps solution was carried out through APDL *DO‐LOOP and array parameter method. The program (capsule volume calculating macro) based on scatter sum method enabled the loop. The scalar quantity PRESSURE was established as inner tracking parameter to update inner pressure. Table parameter PRESSURES was established as inner pressure output parameter to export inner pressure of each load step. According to rubber elastic behavior and cord‐rubber composite aeolotropy, hyper elastic element and layer element were preferred for simulation. Comparison was done between static simulation results and corresponding test data to prove feasibility of multistep analysis. In consequence, some major parameters such as cord angle, initial inner pressure, and auxiliary chamber volume were taken into account, which have remarkable effect on static mechanical performance of EQ6111 air spring. Finally, the same method was applied to the simulation of dynamic test process, achieving abundant analysis results according to every 0.5 Hz increment of load frequencies varying from 0.5 to 2.5 Hz. Load frequency threw remarkable effect on the dynamic mechanical performance of EQ6111 air spring, because inertial effect and damping effect played important roles therein. The study aims to make contribution to the development of platform of air spring simulation and parameterized design (PASSPD). © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009 相似文献
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比较了锦纶帘线与聚酯帘线在空气弹簧胶囊上的使用性能,包括产品成型工艺性能和产品刚度性能,对合理选用胶囊帘线提供了参考。 相似文献
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The temperature increase in flexural fatigue testing of sheet-molding compound SMC-R65 is investigated within a range of testing frequencies from 1000 cpm to 2200 cpm. Variation of the testing frequency affects the temperature increase and, based on 10 percent reduction in flexural stiffness, the effect of changing frequency on the fatigue lives was not detected. Steady-state temperatures are obtained in the case of specimens tested in air. A temperature analysis is carried out that gives reasonable agreement with experimental values. 相似文献
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基于气体热力学和气体动力学,推导了带附加气室空气弹簧垂向刚度表达式,建立了节流孔质量流率数学模型,并在AMESim平台下建立了带附加气室空气弹簧悬架的1/4仿真模型,分析了节流孔横截面积和附加气室容积对带附加气室空气弹簧悬架动力学特性的影响。研究结果表明:节流孔横截面积是影响带附加气室空气弹簧悬架阻尼特性的关键因素,随着节流孔横截面积的增大,带附加气室空气弹簧悬架阻尼特性呈现先增大后减小的趋势;增加附加气室可以减小带附加气室空气弹簧悬架系统刚度,增大附加气室容积可以降低带附加气室空气弹簧悬架系统的自振频率,有利于改善带附加气室空气弹簧悬架系统的隔振性能。 相似文献