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
- The ductile fracture behaviour under Mode I loading using SA533B pressure vessel steel was investigated. Experiments of RNB, VNB and SECB, metallographic examination and the prediction of RDDT were performed. By the comparison between the test data and the predicted results, the following conclusions were obtained.
- mm) bar specimen tested. For this study, each five RNB specimens were tested for 10 mm and 4 mm round notch. The radial and axial extensions were recorded using the radial and axial extensometers (Fig.
- The SECB tests were carried out in accordance with BS 7448 and EGF P-90. The crack growth was monitored by the DCPD method and the physical crack length after fracture, was measured and compared. J values were calculated using the Eq.
- The main objective of this test is the validation of the damage theory that has been chosen as the basis for numerical analysis to be performed in this study later. For this purpose a tensile bar fracture toughness test was carried out using axisymmetric V-notch tensile bar specimens.
대상 데이터
- For these analyses, some necessary parameters such as mesh type and size, mechanical properties, inclusion volume fraction, the constants of RDDT, and the B constant for the criteria of damage, were determined. The adopted mesh is the 4-node quadrilaterl element (0.25 mm). Figure 7 shows the crack tip mesh of RNB-10 and SECB-25 specimen.
- In the former case, the five specimens were tested by single and multiple specimen method, but for the latter case, one specimen was tested as specified by the single specimen method. This test was conducted in displacement control mode using the electrically-driven Mayes machine (SM 100). The SECB tests were carried out in accordance with BS 7448 and EGF P-90.
- 6W. Two width of 25 mm and 50 mm were used. In the former case, the five specimens were tested by single and multiple specimen method, but for the latter case, one specimen was tested as specified by the single specimen method.
이론/모형
- For this purpose a tensile bar fracture toughness test was carried out using axisymmetric V-notch tensile bar specimens. Fatigue pre-cracking was carried out by the Suresh's cyclic compression method (Suresh et al., 1987) and the crack measurement was made by the Hay's DCPD method (Hay et이., 1981). J values were calculated by the Devaux (1985) Eq.
- study later. For this purpose a tensile bar fracture toughness test was carried out using axisymmetric V-notch tensile bar specimens. Fatigue pre-cracking was carried out by the Suresh's cyclic compression method (Suresh et al.
- This test was conducted in displacement control mode using the electrically-driven Mayes machine (SM 100). The SECB tests were carried out in accordance with BS 7448 and EGF P-90. The crack growth was monitored by the DCPD method and the physical crack length after fracture, was measured and compared.
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