空洞率 meaning in Chinese

void content
voidage

The simulation of hemisphere bulging shows that the thin rate decreases about 10 % with direct - reverse process . cavity rate is decreased evidently in the bulging if back pressure is provided . experiment shows that proper back pressure can eliminate big cavity on the condition that strain is not very high
通过增加胀形背压,降低成形件的空洞率,结果显示背压对于空洞率的降低有比较明显的作用,适当的背压甚至可以基本消除应变不是特别大时的空洞。