선택한 단어 수는 입니다.
최소 단어 이상 선택하여야 합니다.
최소 단어 이상 선택하여야 합니다.
선택한 단어 수는 30입니다.
최대 10 단어까지만 선택 가능합니다.
최대 10 단어까지만 선택 가능합니다.
제안 방법
- First, the monotonic tensile tests were conducted for seven stitched and five unstitched specimens at room temperature. In the tests, the load was applied monotonically until specimen failure, and then tensile stiffness and strength were measured.
- 05%, and the damage was observed from the polished edge of the specimen using a digital microscope. In addition, the specimens were ultrasonically C-scanned by using the scanning acoustic microscope (UH-3, Olympus Corporation) in 0.2% strain increments to observe the delamination progress.
- First, the monotonic tensile tests were conducted for seven stitched and five unstitched specimens at room temperature. In the tests, the load was applied monotonically until specimen failure, and then tensile stiffness and strength were measured. The tensile load–unload tests were also conducted for three stitched and three unstitched specimens to observe the damage progress.
- In the tests, the load was applied monotonically until specimen failure, and then tensile stiffness and strength were measured. The tensile load–unload tests were also conducted for three stitched and three unstitched specimens to observe the damage progress. For both tests, a tensile test machine (Instron 5582, Instron Corp.
- Note that pure mode I crack growth was considered in this analysis, and we assigned enough large values to the mode II strength and critical energy release rate. We investigated the effect of the mesh size on the crack extension by analyzing the three models, which had three different sizes of elements (1 mm, 2 mm, and 4 mm).
대상 데이터
- ) [14] were used. Carbon-fiber tows (T800-12kf, Toray Industries Inc.) were used as the inplane tows. The stacking configuration was [−45/45/03/904]s.
- The tensile load–unload tests were also conducted for three stitched and three unstitched specimens to observe the damage progress. For both tests, a tensile test machine (Instron 5582, Instron Corp.) was employed. The crosshead speed was 0.
- In this research, carbon-fiber stitched CFRP laminates (Toyota Industries Corp.) [14] were used. Carbon-fiber tows (T800-12kf, Toray Industries Inc.
이론/모형
- ) was employed. The material was impregnated and molded by the Resin Transfer Molding (RTM) method. For comparison, unstitched laminates were also prepared.
- [13] to the stitched laminate. The method is based on finite element analysis using cohesive elements. A cohesive element is the cohesive zone model, which is introduced between the solid elements to eliminate the stress singularity around the crack tip and express the creation of crack surfaces.
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