| 000 | nam k | |
| 001 | 2210080148818 | |
| 005 | 20140710140014 | |
| 007 | ta | |
| 008 | 891229s1989 bnka FB 000 kor | |
| 040 | ▼a221008 | |
| 041 | ▼akor▼beng | |
| 056 | ▼a551.23▼24 | |
| 100 | ▼a허정원 | |
| 245 | 00 | ▼aBS4360-50D 熱間壓延鋼板의 破壞靭性擧動 考察 /▼d許正元 |
| 260 | ▼a부산:▼b東亞大學校 大學院,▼c1989 | |
| 300 | ▼a38장:▼b삽도;▼c26 cm | |
| 502 | ▼a학위논문(석사)--▼b東亞大學校 大學院:▼c機械工學科,▼d1989. 2 | |
| 520 | ▼b영문초록 : This study is one to estimate the fracture toughness of BS4360-50D hot rolled steel plates and to investigate the microscopic and macroscopic fracture behavior in accordance with JSME S001 regulation equipping with self-made clip-gage and back-face straingage with the exception the general equipment. The result is as follows; 1. The value of fracture toughness is J_(ic) = 287.8KJ/㎡. The blunting line appear two stage; the first is region predominated by pearlite blunting, the second by ferrite blunting. 2. As the result of linearity test of self-made clip-gage manufactured to measure the upper-lower plain loading line displacement (V_(LL')), the maximum deviation is 0.0022mm and lower than that of ASTM regulation (maximum deviation < 0.0025m). Accordingly, the linearity of self-made clip-gage is satisfactory. 3. After inflexion point of P-ε_(BF) where the back face deformation is increased suddenly, the changing rate (Δε_(BF) / ΔV_(LL')) is relatively much higher than that before inflexion point. 4. Before the inflexion point, the changing rate (ΔV_(LL) / ΔV_(LL')) of the two loading line displacement is increased with crack length increment and this behavior is similar to Newman's analysis result; after the inflexion point, (ΔV_(LL) / ΔV_(LL')) appears nearly 1.00 regardless of crack length. 5. The location of the rotational center is longer than Newman's; it is because of the material characteristics that Newman's is one of high strengthㆍlow toughness, this one of low strengthㆍhigh toughness. | |
| 650 | ▼a기계재료역학▼x특수강 | |
| 856 | ▼adonga.dcollection.net▼uhttp://donga.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002141828 | |
| 940 | ▼a비에스사천삼백육십-오십디 열간압연강판의... | |
| 950 | ▼a비매품▼b￦2400▼c(추정가) | |
| 950 | ▼aFB |
BS4360-50D 熱間壓延鋼板의 破壞靭性擧動 考察
종류
학위논문 동서
서명
BS4360-50D 熱間壓延鋼板의 破壞靭性擧動 考察
저자명
발행사항
부산: 東亞大學校 大學院 1989
형태사항
38장: 삽도; 26 cm
학위논문주기
학위논문(석사)-- 東亞大學校 大學院: 機械工學科, 1989. 2
주기사항
영문초록 : This study is one to estimate the fracture toughness of BS4360-50D hot rolled steel plates and to investigate the microscopic and macroscopic fracture behavior in accordance with JSME S001 regulation equipping with self-made clip-gage and back-face straingage with the exception the general equipment. The result is as follows; 1. The value of fracture toughness is J_(ic) = 287.8KJ/㎡. The blunting line appear two stage; the first is region predominated by pearlite blunting, the second by ferrite blunting. 2. As the result of linearity test of self-made clip-gage manufactured to measure the upper-lower plain loading line displacement (V_(LL')), the maximum deviation is 0.0022mm and lower than that of ASTM regulation (maximum deviation < 0.0025m). Accordingly, the linearity of self-made clip-gage is satisfactory. 3. After inflexion point of P-ε_(BF) where the back face deformation is increased suddenly, the changing rate (Δε_(BF) / ΔV_(LL')) is relatively much higher than that before inflexion point. 4. Before the inflexion point, the changing rate (ΔV_(LL) / ΔV_(LL')) of the two loading line displacement is increased with crack length increment and this behavior is similar to Newman's analysis result; after the inflexion point, (ΔV_(LL) / ΔV_(LL')) appears nearly 1.00 regardless of crack length. 5. The location of the rotational center is longer than Newman's; it is because of the material characteristics that Newman's is one of high strengthㆍlow toughness, this one of low strengthㆍhigh toughness.
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