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디젤 엔진용 소성역 체결 MAIN BEARING CAP BOLT의 재사용 연구
김순식(Soonsik Kim),이준항(Joonhang Lee),서승형(Seunghyoug Seo),박익순(Iksoon Park) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_3
The plastic region tightening bolt is usually used for the crank shaft main bearing cap bolt of the diesel engine. If the plastic region tightening bolt is repeatedly reused, it would be subject to the accumulated permanent strain and lowering the bolt axial force only to cause some serious problems. The crank shaft main bearing cap bolt as much as 20 times for a testing with the torque-tension tester. As a result, the max. axial force was reached when the bolt was 10 times, but in consideration of about 5% safety rate of the axial force as well as the ordinary 0.2-0.5% permanent strain, it was deemed desirable to reuse the bolt only 3 times.
김순식(Soonsik Kim),이준항(Joonhang Lee),김경수(Kyoungsoo Kim),김동우(Dongwoo Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In the repeated accelerating and braking process during vehicle operation, the exhaust manifold is subject to the severe thermal stresses due to the cycle of high temperature and cooling. Since the output of our gasoline engine has been enhanced from 3,200cc to 3,600cc, its exhaust gas temperature is expected to rise from 930℃ to 950℃. So, we are planning to develop a heat-resisting steel for the manifold material, which can bear the temperature of exhaust gas over 950℃, at the same cost and weight. We reduced the contents of carbon and increased those of silicone and added up a little contents of tungsten in our current alloy 26%Cr-14%Ni-2%Nb and thereby, alloy designed 6 types. As a result of testing the mechanical properties, thermal deformation and thermal fatigue, the added 10%Ni-2%W(Alloy 4) material and the added 10%Ni-2%W-1.7%Mn(Alloy 5) were more excellent than our current material.
자동차용 8.8 Grade 이하 BOLT의 보론강 적용 연구
김순식(Soonsik Kim),김경수(Kyoungsoo Kim),오상훈(Sanghoon Oh),송태엽(Taeyeop Song) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_3
If the boron should be added to the low carbon steel, the spheroidizing heat treatment could be dismissed in the raw material processing, which would cost reduction about 15%. Thus, it was deemed necessary to change the raw material for less than 8.8 grade bolts coupled for the vehicles, from the medium carbon steel to a boron added low carbon steel. The test samples were made by quenching and tempering M8 and M10 bolt hexes. As a consequence of comparatively testing the medium carbon steel and the boron steel, it was found that the latter showed higher values of mechanical properties and max. axial force than the fanner. However, the two materials showed almost the same values in fatigue test, torque dispersion, micro-structure, metal flow and salt spray test. The boron steel would be subject to the vehicle test before being mass-production.
김순식,신숙희 明知大學校 人文科學硏究所 2005 인문과학연구논총 Vol.27 No.-
The heroine, Grace Marks, in Alias Grace by Margaret Atwood is represented as a woman historiographer. Her name is very ironic compared to the title of the book. It is compounded with the two nouns, grace and marks. Although its literal meaning is glory and traces, it is twisted metaphorically. Grace suffers to death and experiences the crisis of memory lapse and erasing. At the beginning of the novel, she is presented as an “unnameable” being based on her race, gender and class and further as an “unspeakable” being because she is a murderess. As a subaltern she doesn’t have her own traces and voices in the official discourses. Her story is fabricated in a wrong way by the male “authorities” and historians. In spite of her confined environment, Grace can threaten and disrupt the patriarchal discourses by storytelling with her clever use of free-association and dreams. The androcentric texts have many unfilled gaps and holes so that Grace fills them with her own story and historical self-consciousness, And she turns her role to be the deliberate quilt narrator. In the process of rethinking of History, Grace dialogically struggles for the textual space and reconstructs both her hidden/lost stories and the other women’s lives.