Suppression of interfacial crack for foam core sandwich panel with crack arrester
Suppression of interfacial crack for foam core sandwich panel with crack arrester
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DOI：
10.1163/156855107779755309
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发表时间：
2007-01
影响因子：
2.9
通讯作者：
Y. Hirose;M. Hojo;A. Fujiyoshi;G. Matsubara
中科院分区：
文献类型：
--
作者：
Y. Hirose;M. Hojo;A. Fujiyoshi;G. Matsubara
由于脱层通常在表面表皮和泡沫芯之间的界面层传播，因此提出了一种用于抑制脱层的裂纹拦阻器。避雷器具有半圆柱形，设置在泡沫芯内，并附着在表面表皮上。在这里，能量释放率和复杂的应力强度因子计算使用有限元分析。研究了避雷器尺寸及其弹性模量对裂纹抑制能力的影响。当裂纹尖端接近裂纹避雷器的前缘时，能量释放率显著降低。因此，这种新概念的裂纹拦阻器可能成为抑制泡沫芯芯夹层板裂纹萌生和扩展的一种很有前途的装置。
Since delamination often propagates at the interfacial layer between a surface skin and a foam core, a crack arrester is proposed for the suppression of the delamination. The arrester has a semi-cylindrical shape and is arranged in the foam core and is attached to the surface skin. Here, energy release rates and complex stress intensity factors are calculated using finite element analysis. Effects of the arrester size and its elastic moduli on the crack suppressing capability are investigated. Considerable reductions of the energy release rates at the crack tip are achieved as the crack tip approached the leading edge of the crack arrester. Thus, this new concept of a crack arrester may become a promising device to suppress crack initiation and propagation of the foam core sandwich panels.