期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 159, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2022.106987
关键词
Fracture; Damage propagation; Unidirectional; Woven; Over height compact tension
资金
- Rafael Advanced Defense Systems LTD
- Technion Israel Institute of Technology
- US Air Force Research Laboratory (AFRL)
This experimental study investigates the effect of material architecture on damage evolution in carbon/epoxy composites. It was found that woven architectures exhibit more localized and sudden damage propagation, while UD laminates exhibit extensive subcritical damage prior to fiber fracture and have a longer load-bearing capacity.
An experimental study was carried out to investigate the effect of material architecture on the damage evolution in carbon/epoxy composites through Overheight Compact Tension (OCT) tests. Four representative lay-ups were designed for both the unidirectional (UD) and woven-based laminates. Interrupted tests were carried out to characterise specimen damage using X-Ray Micro-Computed Tomography. Digital Image Correlation and Acoustic Emission were used to support measurements. Damage analysis was carried out for each architecture to determine the sequence of damage mechanisms occurring and to assess the development of the Damage Zone (DZ). It was found that in woven architectures, damage is more localized to a narrow band around the artificial crack tip and tends to propagate in a more sudden manner. In UD laminates, extensive subcritical damage occurs prior to fibre fracture, a more prolonged load bearing capability was exhibited, and the developing DZ did not reach a plateau during loading.
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