切欠をもつポリカーボネート板状および丸棒試験片の破損の条件

概要

論文の詳細を見る
The fracture behavior of notched plates and grooved shafts of polycarbonate under tension has been investigated for a wide range of notch geometries and dimensions of specimens. Careful observations were made on the fracture process at the notch root during tests. Bluntly notched specimens failed in a fully ductile manner with large shear bands, and sharply notched specimens failed in a brittle manner after the formation of a small crack at the tip of the plastic zone. By varying the notch root radius and thickness of plates we have been able to distinguish clearly how both influence the brittle-ductile transitions. The critical notch root radius at the brittle-ductile transition increases according to increased thickness of the plate. Experimental results were discuss-ed in terms of a combination of the maximum elastic stress at the notch root and the notch root radius. It has been established that applying a fracture criterion derived here, we can make an accurate estimate of the strength of notched polycarbonate specimens of any shape and size.
一般社団法人日本機械学会の論文
1986-07-25