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首页> 外文期刊>Composite Structures >Low velocity impact damage characteristics of Z-fiber reinforced sandwich panels -- an experimental study
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Low velocity impact damage characteristics of Z-fiber reinforced sandwich panels -- an experimental study

机译：Z纤维增强夹芯板的低速冲击损伤特性-实验研究

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摘要

Experimental results related to the initiation of damage in Z-fiber truss-reinforced sandwich panels are presented. Two different orientations of pin angles are considered. A pendulum-type impactor is used to impart very low levels of impact energy. Threshold energy levels at which the observable damage initiation occurs are determined. Nondestructive evaluation studies conducted prior to the impact are compared with the post-impact status of the panels for assessing the type and magnitude of the damage. These studies include ultrasonic inspection, microscopic inspection and acoustic emission tests. Damage is also evaluated by carrying out vibration tests before and after impact. Static indentation tests are carried out to compare with low velocity impact tests. Effects specific to the impact phenomena are studied by comparing the load displacement characteristics. Compression after impact characteristics are also evaluated.
机译：提出了与Z纤维桁架加强夹芯板中的破坏开始有关的实验结果。考虑了销角的两种不同取向。摆式冲击器用于传递非常低的冲击能量。确定发生可观察到的破坏开始的阈值能量水平。将撞击之前进行的非破坏性评估研究与撞击后状态进行比较，以评估损害的类型和严重程度。这些研究包括超声检查，微观检查和声发射测试。还可以通过在撞击前后进行振动测试来评估损坏程度。进行静态压痕测试以与低速冲击测试进行比较。通过比较负载位移特性来研究特定于冲击现象的影响。还评估了冲击特性后的压缩。

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