It is common sense that mammals reproduce sexually, whereby a sperm cell fertilizes an egg cell. And at some point later in reproduction, a baby with the genetic mixtures from the both parents pops out. However, this ...It is common sense that mammals reproduce sexually, whereby a sperm cell fertilizes an egg cell. And at some point later in reproduction, a baby with the genetic mixtures from the both parents pops out. However, this common perception was shattered by a recent study conducted by researchers from the Institute of Zoology (IOZ), Chinese Academy of Sciences(CAS). Jointly led by Prof. HU Baoyang, CAS Member Prof. ZHOU Qi and Prof.展开更多
In this paper, a theoretical formula is presented to predict the instantaneous folding force of the first fold creation in square and rectangular columns under axial loading.The rectangular column is a small and singl...In this paper, a theoretical formula is presented to predict the instantaneous folding force of the first fold creation in square and rectangular columns under axial loading.The rectangular column is a small and single model of honeycombs with square or rectangular cells.Calculations are based on the analysis of the Basic Folding Mechanism （BFM）.For this purpose, sum of the dissipated energy rate under bending around horizontal and inclined hinge lines and the dissipated energy rate under extensional deformations was equal to the work rate of the external force on the structure.The final formula obtained in this research, reasonably predicts the instantaneous folding force of single-cell square and rectangular honeycombs instead of the average value.Finally, according to the calculated theoretical relation, the instantaneous folding force of the first fold creation in a square column was sketched versus folding distance and compared to the experimental results, which showed a good correlation.展开更多
文摘It is common sense that mammals reproduce sexually, whereby a sperm cell fertilizes an egg cell. And at some point later in reproduction, a baby with the genetic mixtures from the both parents pops out. However, this common perception was shattered by a recent study conducted by researchers from the Institute of Zoology (IOZ), Chinese Academy of Sciences(CAS). Jointly led by Prof. HU Baoyang, CAS Member Prof. ZHOU Qi and Prof.
文摘In this paper, a theoretical formula is presented to predict the instantaneous folding force of the first fold creation in square and rectangular columns under axial loading.The rectangular column is a small and single model of honeycombs with square or rectangular cells.Calculations are based on the analysis of the Basic Folding Mechanism （BFM）.For this purpose, sum of the dissipated energy rate under bending around horizontal and inclined hinge lines and the dissipated energy rate under extensional deformations was equal to the work rate of the external force on the structure.The final formula obtained in this research, reasonably predicts the instantaneous folding force of single-cell square and rectangular honeycombs instead of the average value.Finally, according to the calculated theoretical relation, the instantaneous folding force of the first fold creation in a square column was sketched versus folding distance and compared to the experimental results, which showed a good correlation.
