پديد آورنده :
مهرابي، رضا
عنوان :
بررسي مدل سازي آلياژهاي حافظه دار تحت بار گذاريهاي چند محوره به روش ميكروصفحه در دماهاي مختلف
گرايش تحصيلي :
طراحي كاربردي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده علوم رياضي
صفحه شمار :
ده،182ص: مصور، جدول، نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
محمود كدخدائي
استاد مشاور :
شبنم ارباب شيراني، جمال ارغواني
توصيفگر ها :
تئوري ميكروصفحه , سازگاري ترموديناميك , رفتار سوپر الاستيك , انحراف از قانون تعامد , بارگذاريهاي غير تناسبي , نتايج آزمايشگاهي
تاريخ نمايه سازي :
23/1/93
استاد داور :
مجتبي محزون، كورش حسن پور، علي رضا شهيدي، عباس قائي
كد ايرانداك :
ID599 دكتري
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Modeling of SMAs Behavior under Multiaxial Loadings using Microplane Theory at Different Temperatures Reza Mehrabi mehrabi r@me iut ac ir February 6 2014 Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Mahmoud Kadkhodaei1 Shabnam Arbab CHIRANI2 Jamal Arghavani3 Department Graduate Program Coordinator ABSTRACT Shape memory alloys SMAs are one of the most popular smart materials with the ability to release residual strain and return to their initial configuration when heated up to a particular temperature Due to phase transformations during thermomechanical loading the constitutive modeling of these materials is complex In most of the existing three dimensional phenomenological models some of the material parameters cannot be directly evaluated and must be calibrated by comparing the obtained responses with experimental results This dissertation concerns the modeling of shape memory alloys using microplane formulation in a thermodynamically consistent framework Microplane formulation provides closed form relations for calculating the strain components in terms of the stress components One advantage of this approach is in the limited number of the required material parameters These material parameters can be calculated in simple tension and torsion tests The main feature of this modeling is in describing the behavior of a complex material with simple constitutive laws on each microplane To this end the approach finds the material behavior in any direction on each microplane and then uses the micro macro homogenization process to obtain the overall macroscopic properties Traditionally microplane formulation was based on Volumetric Deviatoric Tangential split and macroscopic strain tensor was derived using the principle of complementary virtual work It has been shown that this formulation might violate the second law of thermodynamics in some loading conditions Here a free energy potential is defined at the microplane level Integrating this potential over all orientations provides the macroscopic free energy Based on this free energy a new formulation based on Volumetric Deviatoric split is proposed These formulations in a thermodynamic framework capture the behavior of shape memory alloys that will maintain the second law of thermodynamic The new formulation based 1 Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran E mail kadkhodaei@cc iut ac ir 2 Laboratoire Brestois de Mecanique et des Systemes ENSIETA UBO ENIB Technopole Brest Iroise Plouzane France 3 Department of Mechanical Engineering Sharif University of Technology 11155 9567 Tehran Iran
استاد راهنما :
محمود كدخدائي
استاد مشاور :
شبنم ارباب شيراني، جمال ارغواني
استاد داور :
مجتبي محزون، كورش حسن پور، علي رضا شهيدي، عباس قائي
