نوع مقاله : مقاله صنایع
نویسندگان
1 گروه مهندسی صنایع، دانشکده فنی مهندسی، دانشگاه آزاد اسلامی، واحد تهران شمال.
2 دانشکده مهندسی مکانیک، دانشگاه تربیت دبیر شهید رجایی، تهران، ایران
3 دانشکده مهندسی عمران-نقشه برداری، دانشگاه تربیت دبیر شهید رجایی
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Cellular solids especially metallic foams have unique characteristics especially in energy absorption applications and good strength to weight ratio. So the uniaxial crushing tests are essential for characterization purposes. The main problem in the mechanical behavior investigations is impossibility to use strain gages and other contact methods for displacement and strain measurement purpose because of their porosity on the faces. In the present research we manipulate the digital image correlation or simply DIC technique for deformation and strain field measurement in quasi-static uniaxial compression test. We use GOM inspect and NCORR software for DIC implementation. Using the image processing method, the displacement and strain field are obtained continuously. For verification purpose, we conduct comprehensive finite element simulation using ABAQUS 2019 commercial non-linear code. Due to the importance of micro-structural modeling in mechanical behavior prediction of cellular solids, we use geometric reconstruction technique based on computed tomography or CT scan images. Also geometric modifications are performed using digital optical microscope. Comparison of DIC results and FEA simulation outputs shows good accordance.
کلیدواژهها [English]
)