نتایج جستجو برای: lead rubber bearing
تعداد نتایج: 428442 فیلتر نتایج به سال:
Natural rubber (NR) has unique properties which are unmatched by synthetic and is used in over 50,000 products. The only commercial source of NR the Para tree (Hevea brasiliensis) insecure because increasing demand, price instability, high labor costs, trade politics, competition with other crops, deforestation bans preventing new H. brasiliensis acreage, disease. Taraxacum kok-saghyz, root dan...
In this paper, annoyance ratings from traffic noise recorded on cobblestones, dense asphalt, and open asphalt rubber pavements are assessed with regard to car speeds and traffic densities. It was found that cobblestones pavements are the most annoying; also while open asphalt rubber pavement imposes less annoyance than dense asphalt it is not significantly different. Higher car speeds always le...
Ecological and socio-economic functions across tropical land use systems after rainforest conversion
Tropical lowland rainforests are increasingly threatened by the expansion of agriculture and the extraction of natural resources. In Jambi Province, Indonesia, the interdisciplinary EFForTS project focuses on the ecological and socio-economic dimensions of rainforest conversion to jungle rubber agroforests and monoculture plantations of rubber and oil palm. Our data confirm that rainforest tran...
in this study, a bearing capacity device is designed and fabricated to determine the load-settlement behavior of three circular footing models resting above the ground water table. capillary rise in the studied well graded sand is measured and the level of the water table is controlled at the desired heights during each bearing capacity test. moreover, shear strength parameters and soil water r...
Introduction Pneumatic artificial rubber muscle (PARM) is a pneumatically driven actuator that provides mechanical effects similar in principle to those of muscle contraction. PARM is a novel actuator that has a high weight-power ratio and maximum contraction over the nominal length is 20%. As shown in Figure 1 , PARM is composed of a rubber tube impregnated with fibers. Teleoperation of pneuma...
in this study an empirical model which can be used to predict the rutting parameter (g*/sinδ) for neat and powder rubber modified bitumen describes. the model was developed using 36 unique powder rubber modified bitumen combinations, rubber concentrations were varied at 5% intervals between 5 and 20%. the effects of powder rubber particle size on model accuracy were also studied ultimately a mo...
In view of the weak isolation and shock absorption effect ordinary bearings at present, a new track damping negative-stiffness device was designed based on principle negative stiffness. The stiffness applied to base isolation, system proposed in which track-type NSD common layer were connected parallel. had characteristics clear force transmission, simple structure, self-resetting ability. theo...
Due to the wide use of rubber components in different engineering applications such as vibration isolators, engine mounts, car tires, and bridge bearing pads, etc. This component mostly subjected high levels noise which are among most reasons that lead failure structures. In present paper has been performed experimentally investigate influences: content ratios natural (NR) polybutadiene (BR.cis...
The aim of this study was to further research the mechanical properties epoxy thick-layer rubber isolation bearings, adopting orthogonal design and efficacy coefficient methods in order optimize geometric dimensions material parameters bearing, summarizing influence various factors on overall performance indicators determining optimal plan through parameter adjustment. Through a combination exp...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید