This modification of the formula shows that the formula of ductile burst internalpressurestrength with Capped-Open condition is valid.
这一修正结果证明了两端开口的韧性爆裂抗内压强度公式是可靠的。
2
Mechanical characteristic of ct is studied. The model of bending, internalpressurestrength and external collapse strength, diametric growth and stuck-point of ct is established.