High-resolution in situ characterization of micromechanisms in CFRP laminates under mode II loading

High-resolution in situ characterization of micromechanisms in CFRP laminates under mode II loading
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II 型加载下 CFRP 层压板微观机制的高分辨率原位表征

DOI:
10.1016/j.engfracmech.2021.108189
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发表时间:
2022
影响因子:
5.4
通讯作者:
Manato Kanesaki
Manato Kanesaki
中科院分区:
工程技术2区
文献类型:
--
作者:
Sota Oshima;Aya Mamishin;Masaki Hojo;Masaaki Nishikawa;Naoki Matsuda;Manato Kanesaki

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采用高分辨率光学显微镜对碳纤维增强塑料(CFRPs)的断裂韧性进行了原位模态测试。在比例极限和平台区域之间中断四点弯曲端缺口弯曲试样的断裂韧性测试,随后使用高分辨率x射线计算机断层扫描系统进行尸检,以识别三维微损伤。观察结果依次捕捉到由塑性区、纤维/基体脱粘和微裂纹组成的损伤区形成过程。在CFRP复合材料II型断裂韧性试验中,微观破坏过程与宏观行为具有相关性。
Micromechanisms in carbon fiber reinforced plastics (CFRPs) were studied byin situmode II fracture toughness tests using a high-resolution optical microscope. The fracture toughness tests on four-point bend end notched flexure specimens were interrupted between the proportional limit and the plateau region, followed by postmortem examination using a high-resolution X-ray computed tomography system to identify three-dimensional microdamage. The observations sequentially captured the formation of damage zone, which composed of plastic zone, fiber/matrix debonding, and microcracks. The microscopic failure process was correlated with the macroscopic behavior of CFRP laminates during mode II fracture toughness tests.
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