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Novel criteria for strength predictions of open-hole composite laminates for preliminary design

机译:用于初步设计的开孔复合层压板强度预测的新标准

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In this work a novel modification of the well-known Whitney-Nuismer criteria is proposed with the aim of having a simple and yet accurate fracture criterion for the important problem of estimating the strength of composite laminates with circular open-holes. The novelty is the use of a critical path curve that makes the proposed criteria quite general and provides very good correlation with experimental data for a wide range of laminates and hole sizes even when the characteristic lengths are assumed as material constants. This assumption dramatically reduces the amount of required experimental testing making these criteria very suitable for preliminary design.
机译:在这项工作中,提出了对众所周知的惠特尼-诺伊斯梅尔(Whitney-Nuismer)准则的一种新颖修改,其目的是针对估计圆形开孔复合层压板强度的重要问题提供一个简单而又准确的断裂准则。新颖之处在于使用了关键路径曲线,该曲线使所提出的标准相当通用,并且即使假定特征长度为材料常数,也能针对各种层压板和孔尺寸与实验数据进行很好的关联。这种假设大大减少了所需的实验测试量,使这些标准非常适合于初步设计。

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