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
- A correlation analysis was performed by comparing the modeling results with the properties measured in the tests. The theoretical formulation to calculate each element during structural analysis was selected, and the tensile test results were converted from nominal stress and strain to true stress and strain. Then while applying them to the structural analysis, the parts mismatched with the test results were modified.
- The theoretical formulation to calculate each element during structural analysis was selected, and the tensile test results were converted from nominal stress and strain to true stress and strain. Then while applying them to the structural analysis, the parts mismatched with the test results were modified. After this correlation analysis, the test and structural analyses obtained very similar load-displacement curves (see Fig.
- This study aims to perform localization development for a hydraulic compressor that can meet the following requirements: cost reduction, efficiency improvement, eco-friendliness, broad operation range, compatibility for low- and high-capacities, size reduction, simple operation, and easy maintenance.
- This high-pressure hydrogen compressor maximizes power efficiency by hydraulically moving the piston inside the cylinder without rotational drives(such as crank shaft, piston rod, and impeller), which are applied for compressing the gas in general 30 MPa compressors. This study constructed a system that compresses and discharges hydrogen using a cylinder and piston with no rotational driver. A two-step compression structure was applied in which a 30 MPa pressure is applied in stage 1 and then a 50 MPa pressure is applied in stage 2.
- 02 to 6000 mm/s. To measure the strain, images were taken with a high-speed camera and the correlations of the digital images were analyzed. For the specimens, dog-bone types fabricated by wire cutting were used to concentrate cracks at the central part.
대상 데이터
- As a result, two types of materials were selected,. SCM440 and SUS316, which are chromium-molybdenum steel and austenitic stainless steel, respectively.
- This product was designed with a two-step compression structure to generate a maximum compressive force of 50 MPa. SCM440 was selected as the material. It showed excellent mechanical performance in the structural analysis among the materials appropriate for a high temperature and pressure environment.
- The performance of the developed model was examined for two materials (SCM440 and SUS316), which were selected in the appropriate material selection step in Section 2.1.
데이터처리
- The same shapes as the specimens used for the properties tests were modeled. A correlation analysis was performed by comparing the modeling results with the properties measured in the tests. The theoretical formulation to calculate each element during structural analysis was selected, and the tensile test results were converted from nominal stress and strain to true stress and strain.
이론/모형
- The hydrogen compressor cannot use a hexagonal element that has a high degree of freedom for strain because it has an asymmetric shape due to the piece cover. To improve the deficiencies of tetra elements (which are likely to generate high stress and stress resistance), the quadratic solid element to which a quadratic equation was applied among the elements in ANSYS was used[4,5].
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