Aerospace; fibre reinforced plastics; testing of multidirectional laminates; determination of bearing strength 航空航天.纤维增强的塑料.多向层压板的试验.支承强度
Aerospace; fibre reinforced plastics; testing of multidirectional laminates; determination of open-hole tensile strength 航空航天.纤维增强的塑料.多向层压板的试验.缺口孔抗
Aerospace; fibre reinforced plastics; testing of multidirectional laminates; determination of filled-hole compressive strength 航空航天.纤维增强的塑料.多向层压板的试验.已填充孔
Aerospace; fibre reinforced plastics; testing of multidirectional laminates; determination of compressive strength after impact test 航空航天.纤维增强的塑料.多向层压板的试验.冲击试验
An analysis scheme and the corresponding computer codes have been developed to evaluate the residual strength and fatigue life of multidirectional laminates 将该模型与结构应力分析和强度计算相结合,设计了相应的疲劳寿命与剩余强度计算流程和程序。
Both tests and calculations were performed to get the fatigue lives for six kinds of multidirectional laminate coupons with different tensile cyclic stress applied 进行了带孔层压板在拉?压疲劳载荷下的疲劳模拟,预测结果与有关文献提供的实测结果符合良好。
In chapter 3, the above cumulative damage model, together with finite element stress analysis, was used to evaluate the fatigue lives of multidirectional laminates under cyclic shear loadings 考虑型材上含裂纹板条以外的其余部分的弯曲刚度对含裂纹板条的作用,形成改进的准三维模型,并编制出相应的有限元分析程序。
An losipescu-type of fixture, which had been previously used for the static shear strength tests of unidirectional laminates or metal materials, was proved useful for the shear static and fatigue tests of multidirectional laminates (6)进行mdyb-3座舱盖有机玻璃撞击损伤剩余强度和疲劳裂纹扩展试验,发现撞击损伤引致的疲劳裂纹的扩展规律与理想的表面裂纹明显不同。
In this research, fatigue life of laminate composite is predicted phenomenologically, dealing mainly with in-plane stresses without accounting for out-of-plane failures such as delamination . fatigue modulus is used as a physical parameter which helps to describe the basic fatigue behaviour of unidirectional laminates and obtain expressions for cumulative damages defined by strains . based on some typical fatigue test data for unidirectional composite laminates, a cumulative fatigue damage model is presented for predicting the fatigue life of multidirectional laminates with arbitrary stacking sequence under complicated fatigue loadings 本文以碳纤维/树脂基t300/qy8911层压结构为研究对象,从唯象的观点出发,以疲劳模量为参量构造损伤函数,基于几组最典型的单向板疲劳试验数据,建立单向板在多轴循环应力作用下的疲劳寿命模型,并以此为基础,发展同种材料体系的任意铺层形式的多向层压板在复杂循环载荷作用下的疲劳寿命预测方法。
With the typical on-axis fatigue tests to get the relative s-n curves of unidirectional laminates, executed at certain stress ratio, it is possible to predict the fatigue life of multidirectional laminates subjected to cyclic stresses of different stress ratios . this would tremendously reduce test costs for laminate structures 考虑了层压板中单向层面内多轴应力和平均应力的影响,在已知单向板在确定应力比下受典型单轴循环应力的s-n曲线的基础上,预测任意铺叠次序层压结构在不同应力比的循环载荷下的疲劳寿命。