نتایج جستجو برای: made structures
تعداد نتایج: 897721 فیلتر نتایج به سال:
abstract in aggregate, active forms of reactive silica with mineral names are sometimes associated with sand and gravel in concrete mixture. alkali hydroxides originated from alkalis in the cement or other resources form an alkaline silica gel with this reactive silica which becomes swallowed and expanded during time causing damage to concrete. there have been growing researches on alkaline r...
When repairing or reinforcing existing structures made of old mild steel, the preferred joining method may be welding rather than bolting, as is usually case. Due to specific properties steels, special problems have considered. The weldability steels particularly influenced by their highly scattering chemical composition, inclusions and distribution in component well limited material toughness....
Abstract The internal structures of metallic products are important in realizing functional applications. Considering the manufacturing inner structures, laser-based powder bed fusion (L-PBF) is an attractive approach because its layering principle enables fabrication parts with customized interior structures. However, inferior surface quality L-PBF components hinders productization progress se...
The paper deals with the laser welding of thick-walled plates a thickness 20 mm made EN AW5083-H111 aluminum alloy. A simulation model for analysis process is developed and verify using temperature measurement during experimental samples by TruDisk 4002 device. Based on numerical in ANSYS program code, suitable parameters production high-quality weld joints were suggested. For at speed 10 mm.s ...
data envelopment analysis (dea) is a powerful tool for measuring relative efficiency of organizational units referred to as decision making units (dmus). in most cases dmus have network structures with internal linking activities. traditional dea models, however, consider dmus as black boxes with no regard to their linking activities and therefore do not provide decision makers with the reasons...
cu-mo and cu-ti contact structures were fabricated on multi-crystalline silicon substrates to provide a low resistance ohmic contact. deposition steps are done in an excellent vacuum chamber by means of electron beam evaporation and samples are then annealed for the realization of an efficient alloy layer. the effects of process parameters such as film thickness, annealing duration and temperat...
natural hazards such as earthquakes have threatened the life of human beings during the history.as a consequence, the vibration mitigation of structures has caught great importance. activecontrol of structures is one of the rapidly emerging areas in the concept of structural control. thispaper presents a control method to deal with this subject when the dynamics of the structure ishysteretic an...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید