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基于细观结构的2.5维机织复合材料强度预测模型邱睿1,温卫东1,2,崔海涛11. 南京航空航天大学能源与动力学院2. 南京航空航天大学机械结构力学及控制国家重点实验室摘 要:采用经纱矩形截面及纬纱六边形截面假设,将经纱的屈曲轨迹简化为折线形式,建立了2.5维机织复合材料单胞几何模型.以单胞为研究对象,引入改进的三维Hashin失效准则和Mises准则作为组分材料的失效判据,采用不同的刚度退化方式来表征不同的失效模式,建立了基于逐渐损伤理论的强度预测模型.利用有限元分析(FEA)技术,开发了相应的参数化2.5维机织复合材料逐渐损伤分析程序,预测了浅交弯联结构不同机织参数2.5维机织复合材料的拉伸强度,并模拟了经向拉伸和纬向拉伸的损伤扩展过程.与静拉伸试验结果相比,拉伸强度的预测误差在10%以内;模拟的失......
缠绕线型对缠绕复合材料圆管轴向拉伸失效的影响温卫东1,2,3,李俭4,崔海涛1,2,徐颖1,2,张宏建1,21. 南京航空航天大学江苏省航空动力系统重点实验室2. 南京航空航天大学能源与动力学院3. 南京航空航天大学机械结构力学及控制国家重点实验室4. 厦门大学物理与机电工程学院航空系摘 要:采用细观刚度模型的有限元分析(FEA)与改进的逐渐累积损伤方法相结合,建立了缠绕复合材料圆管轴向拉伸失效的分析方法与流程,以揭示缠绕线型对缠绕复合材料损伤失效的影响.对沿圆周方向分布有1个,3个和5个单胞的3种不同线型的缠绕复合材料圆管试件进行轴向拉伸破坏实验,获得其失效形式,平均拉伸强度及其随缠绕线型的变化规律.研究表明:缠绕复合材料圆管轴向拉伸失效主要以丧失承载能力的功能失效为主,缠绕线型对其拉伸强度有一定的......
condition. According to the experimental results, using numerical calculation software program and the numerical simulation with finite element analysis (FEA), the relationships among the maximal load......
was simulated by parabola model and linear model respectively. Additionally, the curing craft and structure of the fender were modified and evaluated based on finite element analysis (FEA). As a result......
of thermal expansion were analyzed. A simulation method based on "element birth and death" method of Finite element analysis(FEA) was presented to simulate the cutting process and predict......
Finite Element Analysis of Ceramic Coatings under Spherical Indentation with Metallic Interlayer: PartⅠUncracked CoatingsMinh-Quy LE,Seock-Sam KIM摘 要:<正>Spherical indentation of ceramic coatings with metallic interlayer was performed by means of axisymmetric finite element analysis (FEA). Two typical ceramic coatings with relatively high and low......
Element Analysis of Ceramic Coatings under Spherical Indentation with Metallic Interlayer: PartⅡRing CrackMinh-Quy LE,Seock-Sam KIM摘 要:<正>Spherical indentation of ceramic coatings with metallic interlayer was performed by means of axisymmetric finite element analysis (FEA). Two typical ceramic coatings with relatively high and low elastic modulus......
; Abstract: The finite element analysis (FEA) software Ansys was employed to study the stress state... stress concentration was serious. FEA results show that the change of parting face from non-plane to plane can greatly reduce the stress at the teeth tips of the die so that the tip fracture is avoided......
conditions of composite box beams were established. Analytic solutions of combined differential equations were also established. Partial degree of freedom was adopted to establish a new FEA element of three......
the electromagnetic aluminum tube-compression forming by means of the FEA software ANSYS, and this is the first time that the magnetic pressure distribution in every layer of the thickness of the tube has......