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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >Failure maps for rectangular 17-4PH stainless steel sandwiched foam panels
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Failure maps for rectangular 17-4PH stainless steel sandwiched foam panels

机译：矩形17-4PH不锈钢夹层泡沫板的失效图

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摘要

A new and innovative concept is proposed for designing lightweight fan blades for aircraft engines using commercially available 17-4PH precipitation hardened stainless steel. Rotating fan blades in aircraft engines experience a complex loading state consisting of combinations of centrifugal, distributed pressure and torsional loads. Theoretical failure plastic collapse maps, showing plots of the foam relative density versus face sheet thickness, t, normalized by the fan blade span length, L, have been generated for rectangular 17-4PH sandwiched foam panels under these three loading modes assuming three failure plastic collapse modes. These maps show that the 17-4PH sandwiched foam panels can fail by either the yielding of the face sheets, yielding of the foam core or wrinkling of the face sheets depending on foam relative density, the magnitude of t/L and the loading mode. The design envelop of a generic fan blade is superimposed on the maps to provide valuable insights on the probable failure modes in a sandwiched foam fan blade.
机译：提出了一种新的创新概念，用于使用市售的17-4PH沉淀硬化不锈钢设计飞机发动机的轻型风扇叶片。飞机发动机中的旋转风扇叶片会经历复杂的负载状态，其中包括离心，分布压力和扭转负载。在三种载荷模式下，假设三种失效塑料，矩形的17-4PH夹层泡沫板已生成了理论破坏塑性塌陷图，该图显示了泡沫相对密度与面板厚度t的关系曲线，该值通过风扇叶片跨度L归一化。崩溃模式。这些图表明，取决于泡沫相对密度，t / L的大小和加载方式，17-4PH夹层泡沫板可能会因面板的屈服，泡沫芯的屈服或面板的起皱而失效。通用风扇叶片的设计轮廓被叠加在地图上，以提供有关夹层泡沫风扇叶片可能出现故障模式的宝贵见解。

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