عنوان	Dynamic mechanical behavior of CNT-reinforced epoxy under medium-strain rate: A comparative study
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	Impact loading; Dynamic fracture toughness; Nanocomposites; Medium strain rate; Experimental study
چکیده	Carbon nanotubes (CNTs) are generally recognized as one of the most effective fillers to improve the properties of polymeric materials. Subjected to dynamic loading, polymer-based materials often exhibit high strain rate sensitivity. This research investigates the effectiveness of CNTs fillers on the mechanical properties of an epoxy resin at low to medium strain rates through conducting a comparative experimental study. Performing tensile and shear tests, the elastic modulus and strength properties of CNT/epoxy and pure epoxy resin are measured at different strain rates. By proposing an empirical logarithmic relationship, the prediction of dynamic elastic modulus and strength properties at any desired low to medium strain rate is facilitated. For measuring the dynamic fracture toughness of CNT/epoxy and pure epoxy resin at medium strain rate, the instrumented charpy impact test based on the Dynamic Key Curves (DKC) method is used. Experimental measurements still imply on significant enhancements in axial and shear properties and also dynamic fracture toughness up to medium strain rates of 150 s−1 by adding small portion of CNTs.
پژوهشگران	رضا یزدان پرست (نفر اول)، رهام رفیعی (نفر دوم)، بینگ لی (نفر چهارم)