T800HB碳纤维复合材料壳体定量化等强度补强技术

Quantitative Isostrength Reinforcement of Composite Case Made of T800HB Carbon Fiber

文摘T800HB碳纤维性脆,制备的复合材料壳体易在封头部位低压破坏。为克服传统补强方式给筒段纵向带来的冗余质量,采用等强度补强理念,以Φ150 mm壳体为研究对象,借鉴复合材料壳体应力平衡系数,通过应变分析与试验验证,定量化得出等强度增强所需材料的厚度。研究结果表明,定量化等强度补强技术可行、可靠,制备的T800HB碳纤维壳体的爆破压力均达到设计值,筒段纵向材料强度不再富余,特别对提高大长径比壳体的PV/W值有积极作用。

Composite case made of brittle T800HB carbon fiber is sensitive to stress concentration,and easily cause case dome failure at low pressure. In order to overcome redundant mass of longitudinal layer of cylinder section induced by traditional carbon cloth and UD cloth reinforcement,isostrength reinforcement method is used. Φ150 mm pressure case is treated as study object,stress equilibrium factor in processing design of composite case is referred,and composite thickness in quantitative isostrength reinforcement is concluded by comparison about strain result and experiment result. As a result,quantitative isostrength reinforcement is practicable and reliable. Burst pressure of T800HB carbon fiber case using isostrength reinforcement method totally achieves design value,and longitudinal layer strength in cylinder is not redundant. The method can increase PV/W of case,especially high length-to-diameter ratio case.