The application of skewed hypar shell as civil engineering roofing unit is an established fact. Such use has gained a greater momentum when this shell is fabricated with advanced materials like the laminated composites. Research attempts in studying the first ply failure behaviour of laminated composite structural units are common now among engineers and the novelty of this paper lies in continuation of such efforts being applied to composite skew hypar shell. For accurate modelling of the failure behaviour of this thin shell, nonlinear strains are considered together with eight noded isoparametric serendipity finite element. Different well-established failure criteria including the failure criterion of Puck are used to extract the first ply failure pressure values, failure locations and failure modes as well. The finite element code developed is used for numerical experimentation with parametric variations and the results are post processed and interpreted to extract meaningful engineering conclusions.

倾斜的hypar外壳作为土木工程屋面单元的应用是既定的事实。当这种外壳由层压复合材料等先进材料制成时，这种使用获得了更大的动力。研究层状复合结构单元的第一层破坏行为的研究尝试现在在工程师中很常见，本文的新颖之处在于继续将这些努力应用于复合斜斜哈帕壳。为了对这种薄壳的失效行为进行精确建模，将非线性应变与八节点等参偶然性有限元一起考虑。包括 Puck 失效准则在内的不同的完善失效准则也用于提取第一层失效压力值、失效位置和失效模式。