1. 제 목 : MULTISCALE UNIT CELL ANALYSIS OF TEXTILE-REINFORCED


COMPOSITES' FINITE DEFORMATION STIFFNESS CHARACTERISTICS




2. 연 사 : Dr. Kim, Hyung Joo


The Center for Computer Aided Design, The University of Iowa




3. 일 시 : 2003년 1월 17일 (금) 16:00 - 17:30




4. 장 소 : 서울대 신공학관(301동) 117호 세미나실




5. 내 용 :




Nonlinear elastic stiffness behaviors of plane-weave textile-reinforced composites are considered in this work by modeling finite deformation effects at two scales: (1) at the fiber diameter scale within yarns (~10 microns); (2) at the yarn diameter scale within woven textiles (~1000 microns). To capture the effect of heterogeneous microscale stress and strain fields, symmetric, conjugate, stress and strain measures are first established. A transversely isotropic hyperelasticity model is then presented for modeling finite deformation behaviors of yarns. After the free parameters of this model are estimated using unit cell analysis at the fiber-diameter scale, it is then incorporated into plane-weave textile unit cell model. The textile mode is then subjected to finite strain deformation-controlled loading to quantify nonlinearity in stiffness behaviors.






6. 약력 및 수상 경력 :




1993 B.S. Aerospace Engineering, Seoul National University


1995 M.S. Aerospace Engineering, Seoul National University


2002 Ph. D, Mechanical Engineering, University of Iowa


2002-present Postdoctoral Researcher,


The Center for Computer Aided Design, University of Iowa




7. 문 의 : 기계항공공학부 김 승 조 교수 (☏ 880-7388)