Papers by Author: Seung Yong Yang

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Authors: Seung Yong Yang
Abstract: Three-dimensional cohesive zone model was used to simulate the fatigue crack growth of a weld specimen. Damage accumulation was accounted for using a constitutive model. A surface along which the fatigue crack would grow was assumed along the symmetric plane of the specimen and the cohesive elements were applied on the surface. Tensile tests of weld and parent specimens were simulated by the finite element method. Results of fatigue crack growth for the weld and parent specimens were compared and the effect of changing a constitutive parameter on the fatigue crack growth behavior was also checked.
Authors: Seung Yong Yang
Abstract: To explore the structural strength of CFRP shape memory alloy composites, it is necessary to evaluate the interface bonding strength. Jang and Kishi experimentally investigated the adhesive strength between NiTi fibers and CFRP composite [1]. In this paper, the interface de-decohesion behavior was simulated by three-dimensional cohesive zone method. The values of related numerical parameters were chosen to fit the experimental result.
Authors: Ki Weon Kang, Seung Yong Yang, J.H. Kim, Jung Kyu Kim, Heung Seob Kim, H.J. Kim
Abstract: This paper deals with the damage behavior of glass/epoxy composite laminates subjected to low-velocity impact at various temperatures. For this goal, the impact tests were performed by using an instrumented impact-testing machine at three temperatures: +20°C, -10°C and -40°C. And the resultant damages were inspected through the scanning acoustic microscope (SAM). Also, based on the impact force history and the damage configuration of the laminates, the impact resistance parameters were employed to evaluate damage resistance of glass/epoxy laminates. As results, it was found that the temperature changes affect the damage resistance capacity of glass/epoxy laminates.
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