Gi‐Dong Sim
KAIST 기계공학과 · 공학
Gi-Dong Sim 교수의 연구실은 나노스케일에서의 기계적 거동과 신축성 전자소자의 기계적 안정성을 핵심으로 삼고 있습니다. 특히 고분자 기반 기판에 증착된 금속 박막의 신축성, 피로 거동 및 나노스케일에서의 체적 효과를 실험과 유한요소 해석을 통해 규명하고 있습니다. 고분자 기반 유연 전자소재의 신뢰성 향상을 위한 기초 물성 연구와 함께, 쌍극모멘트 이론 등 체적 효과를 고려한 고차원 연속체 이론의 적용도 활발히 진행 중입니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
In this paper, we report that silver films evaporated on poly-ethylene-terephthalate (PET) substrates coated with an acrylic primer can be stretched beyond 70% without fracture. As-deposited films show a larger failure strain than annealed coatings. These observations are rationalized in light of a ductile fracture mechanism where debonding from the substrate coevolves with strain localization. The results of this study indicate that PET substrates coated with an acrylic primer layer may be suit
Higher-order deformation theories, such as the couple stress and strain gradient theory, have been widely used to predict the mechanical behavior of micro/nano-scale structures. In this paper, the additional length scale parameter introduced in the couple stress theory is measured by performing bulk-scale tensile and micro-scale cantilever bending experiments. Bulk-scale characterization provided microstructural information of the polycrystalline copper plate along with macroscopic mechanical pr
Flexible electronics using nanoparticle (NP) printing has been highlighted as a key technology enabling eco-friendly, low-cost, and large-area fabrication. For NP-based printing to be used as a successive alternative to photolithography and vacuum deposition, stretchability and long term reliability must be considered. This paper reports the stretchability and fatigue behavior of 100 nm thick NP-based silver thin films printed on polyethylene-terephthalate substrate and compares it to films depo
