Mechanical Behavior of FRP-Strengthened Concrete Columns Subjected to Concentric and Eccentric Compression Loading

2013 ◽  
Vol 17 (3) ◽  
pp. 336-346 ◽  
Author(s):  
Xiaobin Song ◽  
Xianglin Gu ◽  
Yupeng Li ◽  
Tao Chen ◽  
Weiping Zhang
Keyword(s):  
Mechanical Behavior ◽  
Concrete Columns ◽  
Compression Loading ◽  
Eccentric Compression

ANTICYTOSKELETAL DRUGS AND TIME CULTURE EFFECTS UPON THE MECHANICAL BEHAVIOR OF DERMAL EQUIVALENT TISSUE SUBMITTED TO UNCONFINED COMPRESSION LOADING

2008 ◽  
Vol 08 (03) ◽  
pp. 339-352 ◽  
Author(s):  
S. RAMTANI ◽  
D. GEIGER
Keyword(s):  
Mechanical Behavior ◽  
Internal State ◽  
Skin Grafting ◽  
Biological Tissues ◽  
Matrix Remodeling ◽  
Unconfined Compression ◽  
Compression Loading ◽  
Dermal Equivalent ◽  
Variable Approach ◽  
Time Culture

The dermal equivalent (DE), a dermis substitute consisting of human skin fibroblasts growing into a three-dimensional collagen matrix, is extensively used in many applications: wound-healing response, pharmacological studies, skin grafting, fibroblast proliferation and migration, extracellular matrix remodeling, and efficacy of cosmetic products. The widespread growth of numerical modeling in biomechanical research has placed a heightened emphasis on accurate material property data for soft biological tissues, in particular for equivalent dermis which has not been so thoroughly investigated. Under unconfined compression loading, the effects of the strain rate, time culture, and cytoskeleton-disrupting agents are experimentally investigated. In order to model the observed mechanical behavior of the DE under the above conditions, the internal state variable approach is adopted for finite deformation viscoelasticity and the optimized material parameters are identified with respect to the stated thermodynamic restriction (i.e. positive viscous dissipation).

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