نوع مقاله : گرایش دینامیک، ارتعاشات و کنترل
نویسندگان
1 نویسنده مسئول: استادیار، دانشکده مهندسی هوافضا، دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران
2 استاد، دانشکده مهندسی هوافضا، دانشگاه صنعتی شریف، تهران، ایران
چکیده
چکیده تصویری
)
تازه های تحقیق
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Vibration control of engineering structures and reducing its unpleasant effects such as high cycle fatigue (HCF), structural failure, noise and etc., has been a very active subject of research. Although reducing weight of structures can be counted as a positive achievement, it may lead to increase in vibratory motions. Energy dissipation due to high amount of hysteresis in shape memory alloy (SMA) wires which is vibrating together with the structure, is a potential solution in vibration control field. In this regard, reducing vibration amplitude is obtained along with relatively low increase in weight of structure respect to other dampening methods like viscoelastic materials. In this paper, carried out experimental tests on Ni-rich Nitinol samples are presented and required parameters for simulation of the pseudo-elastic behavior are extracted. These tests involve calorimetry and various tensile tests using environmental chamber. Pseudo-elasticity, pseudo-plasticity, strain recovery and de-twinning phenomena are perceived experimentally. Also, response of a Nitinol wire by considering its pseudo-elastic behavior is presented numerically.
کلیدواژهها [English]
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