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김동건,이기정,이준정 대한금속재료학회(대한금속학회) 1984 대한금속·재료학회지 Vol.22 No.10
Effect of transformed ferrite content on the mechanical properies of dual-phase steels has been studied and analyzed on the basis of observation on the austenite-to-ferrite transformation behavior during post-anneal cooling. Various contents of transformed ferrite were obtained by changing intercritical annealing temperature. As the transformed ferrite content was increased up to about 40%, dual-phase properties became better due to the finer distribution of martensite particles. However, the dual-phase properties were deteriorated when the transformed ferrite content becomes larger than the retained ferrite content. The significance of these results is discussed in relation to the austinite-to-ferrite trans formation behavior during intercritical annealing.
A Rate Dependent Plasticity Model under Cyclic Loading of Metals
김동건,Kim, Dongkeon,Dargush, Gary F. Korean Society for Advanced Composite Structures 2013 복합신소재학회논문집 Vol.4 No.1
In real world applications, the response of structures may be dependent on the rate of loading and thus can be affected by transient loading, especially when the rate of loading is significant. In such situations, the rate of loading may become a major issue to understand structures during earthquake excitation or under blast or high velocity impact. In some cases, the rate effect on structures under strong earthquake excitation cannot be ignored when attempting to understand inelastic behavior of structures. Many researchers developed the constitutive theories in cyclic plasticity and viscoplasticity. In this study, numerical simulation by cyclic visocoplasticity models is introduced and analyzed. Finally, the analytical results are compared with experimental results as a means to evaluate and verify the model.
김동건 경희대학교 인문학연구소 2003 인문학연구 Vol.7 No.-
This discussion started from requirement for necessity of deep argument about each <Toggi-Jeon> version to make clear characteristics and principles of all <Toggi-Jeon> versions. <Togong-Jeon> - object of this thesis is the second longest version and supposed to be written in at the end of 19th century. The characteristics of <Togong-Jeon> are considerable in three ways. Firstly, the story is focussed on main character. Secondly, in general it has positive eyes on middle century's social system. Lastly, ending part having totally new story not ever found is almost half quantity of whole story. <Toseong-Jeon> has relationship with <Togong-Jeon>, this relationship is supposed to be occurred in a process while <Toseong-Jeon> had been traslating into <Togong-Jeon>. The reasons of this judgement are like below - 1) <Togong-Jeon> uses chinese letters already used in <Toseong-Jeon>. 2) Many unnatural parts are found in <Togong-Jeon>. 3) There are contradictary contents contrast with passage of whole story. 4) Contradictary contents in <Togong-Jeon> became a nearly perfect form in <Toseong-Jeon>. 5) <Toseong-Jeon> is closer to <Pansori>-Chang version than <Togong-Jeon>. <Toggi-Jeon> is quite different from <Togong-Jeon> however these versions have common stories so that we recognize there are connections between them. In conclusion it's reliable point that <Togong-Jeon> was written earlier than <Toggi-Jeon> in the reason of the fact <Toggi-Jeon> was digested in the ending part of <Togong-Jeon>.