基于ABAQUS的橡胶隔振器静态特性分析

本文对橡胶材料的非线性本构关系进行了分析,应用有限元软件ABAQUS建立橡胶隔振器模型,选用Mooney-Rivlin超弹性模型模拟橡胶的材料属性,仿真分析了橡胶隔振器的垂向静刚度随预载荷变化的关系。同时与经验公式对比分析,有限元仿真结果与计算结果在误差范围之内,表明有限元计算方法能较理想的获得橡胶隔振器静态特性,可为优化悬置系统的整体性能提供依据。     

用于越野车变速箱上部的悬置软垫总成

由安徽江淮汽车股份有限公司申请的专利(公开号CN 202242967U,公开日期2012-05-30)"用于越野车变速箱上部的悬置软垫总成",涉及的悬置软垫总成包括由橡胶衬套和圆筒状壳体组成的悬置软垫,壳体轴向一侧设有盒体状下悬置骨架,下悬置骨架内设有长方体配重块;壳体轴     

液阻橡胶悬置的动特性试验分析及参数识别

试验测试液阻橡胶悬置和橡胶主簧的低频动态特性.建立悬置集总参数模型,采用流固耦合有限元方法和基于不动点理论的参数识别方法辨识悬置集总参数.两种方法辨识结果的一致性说明了有限元模型的合理性,为液阻橡胶悬置设计开发提供了依据.     

液压悬置橡胶主簧静态力学特性计算与试验研究

运用有限元理论和Abaqus分析软件建立某小型客车动力总成液压悬置橡胶主簧的有限元离散模型,探讨橡胶主簧的轴向与径向静态力学特性的仿真计算方法,对比仿真计算结果与试验结果,验证了有限元分析方法的正确性。计算分析了胶料硬度对橡胶主簧静态力学特性的影响,结果表明,橡胶主簧静态刚度与胶料硬度正相关,且径向刚度对橡胶硬度更为敏感。     

有限元分析所用橡胶弹性特性的表征方法

本文旨在综述有限元分析所用的橡胶弹性行为的表征方法。作者列举了采用弹性应变能强度函数以表征橡胶特性的实例，并作了根据这些函数表征橡胶特性所要求的试验。文献讨论了采用合成试验数据的方法来代替全面的物理性能试验，并通过专题研究加以阐明。本文最后讨论了对橡胶零件作有限元分析存在的潜在误差问题。     

一种发动机前悬置橡胶软垫

正本实用新型公开了一种发动机前悬置橡胶软垫,包括两个分体式的结构相同、呈镜向上下对称设置的上橡胶软垫和下橡胶软垫,均包括同轴设置的上骨架、下骨架和设在中间的橡胶体,橡胶体呈外圆柱内锥面结构,外圆柱与内锥面具有相同的中心轴,其中:内锥面的上端口直径大于下端口直径;下骨架嵌入在橡胶体底面通过硫化一体成型,下骨架中心设有中心套管安装部,用于安装中心套管;     

有限元分析所用橡胶弹性特性的表征方法

本文旨在综述有限元分析所用的橡胶弹性行为的表征方法。作者列举了采用弹性应变能强度函数以表片橡胶特性的实例，并作了根据这些函数表征橡胶特性所要求的试验。文献讨论了采用合成试验数据的方法代替全面的物理性能试验，并通过专题研究加以阐明。本文最后讨论了对橡胶零件作有限元分析存在的潜在误差问题。     

悬置橡胶软垫

<正>授权公告号:CN 107444096B授权公告日:2019年5月7日专利权人:安徽江淮汽车集团股份有限公司发明人:李立波、顾海南、洪健等本发明公开了一种悬置橡胶软垫的设计方法,包括上盖板、下盖板、固定在上盖板和下盖板间的橡胶体和限位架。限位架包括两侧的侧板和设在两侧板底部的弹性卡片,侧板相互平行且分     

橡胶元件在汽车悬架中的应用分析

对汽车悬架中使用橡胶元件进行分析,针对橡胶套管的性能分析、动特性测试以及有限元分析进行了较为全面的阐述,再从整车性能和悬架弹性运动两个方面对橡胶元件在汽车悬架中发挥的作用进行分析,得出橡胶元件可以优化汽车悬架运动性能的结论,并指出需进一步对橡胶元件对汽车高频动态特性的影响作出研究,以推动橡胶元件在汽车悬架中的应用。     

汽车动力总成液阻悬置橡胶主簧的研究

汽车动力总成液阻悬置经常受到发动机与路面双向的频变和幅变的的作用。橡胶主簧对液阻悬置在复杂工况下的性能有着重要的影响,为了研究橡胶主簧的减振性能,利用有限元方法与试验相结合的方法,根据工作条件选取相应的本构模型,与试验数据对比来获得减振橡胶材料在动态条件下的性能,得到了理论与试验基本一致的应力应变数据。该研究方法为工业中各种减振隔振橡胶材料有限元分析提供了基础理论,为汽车动力总成悬置设计提供一种有效的研究方法。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料,介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比,介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序,对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。