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首页> 外文会议>PVP2011;ASME Pressure Vessels and Piping conference >REALISTIC MODELING OF THE FAILURE OF COMPOSITE PIPES UNDER RING DEFLECTION AND INTERNAL PRESSURE LOADING CONDITIONS
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REALISTIC MODELING OF THE FAILURE OF COMPOSITE PIPES UNDER RING DEFLECTION AND INTERNAL PRESSURE LOADING CONDITIONS

机译：圆环挠度和内部压力载荷条件下复合管破坏的真实建模

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摘要

Realistic numerical models of the behavior of glass-fiber reinforced plastic (GFRP) pipes under two loading conditionsring deflection and internal pressure - representative of their typical applications were developed and experimentally validated. A 2D modeling approach was implemented, using cohesive elements to accurately represent at the layer/laminate level the damage mechanisms leading to failure of these composite structures and estimate their ultimate strength under those loading conditions. The innovative and advantageous feature of these models is their ability to identify the load level at which damage is initiated, its location and the way it propagates thus giving a realistic assessment to the composite pipes' behavior. Inter-layer delamination and transverse fiber breakage were identified as main damage mechanisms occurring up to the catastrophic failure of the pipes. The numerical-experimental procedure conducted in this study allowed also to determine the proper values of material's physical properties such as inter-and intra-layer energy release rates governing the failure mechanisms.
机译：开发了玻璃纤维增​​强塑料（GFRP）管在挠曲和内压两种载荷条件下的行为的真实数值模型-代表了它们的典型应用，并进行了实验验证。实施了2D建模方法，使用内聚元素在层/层压层上准确表示导致这些复合结构破坏的损伤机制，并估计在这些载荷条件下的极限强度。这些模型的创新性和优势在于，它们能够识别引发损坏的载荷水平，载荷的位置和传播方式，从而对复合管的行为进行了实际评估。层间分层和横向纤维断裂被认为是发生在管道灾难性破坏之前的主要破坏机制。在这项研究中进行的数值实验程序还允许确定材料物理特性的适当值，例如决定失效机理的层间和层内能量释放速率。

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