In sheet metal forming processes with complex strain paths, a part is subjected to large plastic deformation. This severe plastic deformation leads to high plastic strain localization zones and subsequent accumulation of those strains. Then internal and superficial micro-defects and in other words ductile damage is created. This damage causes quality problems such as fracture. Therefore, design...

man's past condition is related to his present life and history means surveying the quality of the past activities whose traces remain in the present time. the main field of historical research is man's past life, the stages which have been put behind in the process of evolution and changes as well as progresses made in these stages. history is a means to provide human beings with a complete in...