CAJ | 학술논문

为提高结构的可靠性,深海载人潜水器载人球的设计标准越来越重视材料的综合性能,因此钛合金成为广泛应用于潜水器耐压球壳的理想材料.基于断裂韧性指标的损伤容限设计原则将在未来的结构优化方案中得到体现,其中断裂韧性是重要的材料损伤容限特性之一.为研制4 500 m载人潜水器,文中对两种备选钛合金的多组非标试样断裂韧性试验结果进行了分析,重点考察了相同韧带尺寸下试件厚度的效应,对非标试样KQ和Pmax/PQ随着厚度的变化趋势进行了解释,为修改现行断裂韧性试验标准提供了建议.
위제고결구적가고성,심해재인잠수기재인구적설계표준월래월중시재료적종합성능,인차태합금성위엄범응용우잠수기내압구각적이상재료.기우단렬인성지표적손상용한설계원칙장재미래적결구우화방안중득도체현,기중단렬인성시중요적재료손상용한특성지일.위연제4 500 m재인잠수기,문중대량충비선태합금적다조비표시양단렬인성시험결과진행료분석,중점고찰료상동인대척촌하시건후도적효응,대비표시양KQ화Pmax/PQ수착후도적변화추세진행료해석,위수개현행단렬인성시험표준제공료건의.
The current material selection and design rules for the spherical pressure hull of manned submersibles pay more attention to the synthetic properties of materials of interest for high safety and reliability.Several types of titanium alloys are developed for this purpose.Damage-tolerant properties will be considered for more optimized design principle in the future.Fracture toughness is one of the main damage-tolerant properties.For the material selection and design of a 4 500 m depth manned submersible in China,tests using non-standard specimens are conducted on two types of candidate titanium alloys.Thickness effect is specifically investigated using specimens with similar ligament size.Analysis on the tendency of KQ and Pmax/PQ data with increasing specimen thickness will be conducted in this paper.This will be useful for modifying the current test standard for thinner specimens.