摘要
拉伸强度材料许用值是开展舰用复合材料结构设计所需的重要指标参量。SW220/430LV复合材料是目前较为常用的舰用复合材料体系之一。首先依据规范GB/T 1447-2005开展0°/90°铺层试件拉伸强度试验研究,并根据B基准值要求,得出拉伸强度基准值XT。在此基础上,分别针对不同折减系数条件下的载荷值,开展拉-拉疲劳特性、疲劳承载后剩余强度/刚度试验研究,并同时探讨了载荷特征、应力比、加载频率、疲劳周期等对SW220/430LV复合材料疲劳特性的影响规律。研究结果表明,当计及结构疲劳承载时,SW220/430LV复合材料拉伸强度材料许用值可取为0.45XT。
The tensile strength design value is an important guideline to weigh the intensity of composite lami- nates. SW220/430LV composite material is a kind of typical composite material widely used in warships. In order to explore the intensity, the paper carried out the investigation about the tension strength of 0°/90° with referring to GB/T 1447-2005, and worked out tensile strength Xr by B-base value. Then, we get loads responsible to reduction coefficient to make research about tension-shear fatigue and the left stiffness, shear strength, and explore effects of the load characteristics, such as stress ratio, frequency, fatigue cycle to the SW220/430LV composite material at the same time. According to our research, we take 0. 45 Xr as the design tensile strength design value for SW220/ 430LV composite material, when allowing for mechanical fatigue.
出处
《玻璃钢／复合材料》
CAS
CSCD
北大核心
2015年第9期11-16,共6页
Fiber Reinforced Plastics/Composites
基金
国家自然科学基金面上项目资助(51479205)
