Energy dissipation in mammalian collagen fibrils: Cyclic strain-induced damping, toughening, and strengthening.
Energy dissipation in mammalian collagen fibrils: Cyclic strain-induced damping, toughening, and strengthening.
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哺乳动物胶原蛋白原纤维中的能量耗散：环状应变引起的阻尼，韧性和增强。
DOI：
10.1016/j.actbio.2018.09.027
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发表时间：
2018-10-15
影响因子：
9.7
通讯作者：
Chasiotis I
中科院分区：
文献类型：
--
作者：
Liu J;Das D;Yang F;Schwartz AG;Genin GM;Thomopoulos S;Chasiotis I
As the fundamental structural protein in mammals, collagen transmits cyclic forces that are necessary for the mechanical function of tissues, such as bone and tendon. Although the tissue-level mechanical behavior of collagenous tissues is well understood, the response of collagen at the nanometer length scales to cyclical loading remains elusive. To address this major gap, we cyclically stretched individual reconstituted collagen fibrils, with average diameter of 145±42 nm, to small and large strains in the partially hydrated conditions of 60% relative humidity. It is shown that cyclical loading results in large steady-state hysteresis that is reached immediately after the first loading cycle, followed thereafter by limited accumulation of inelastic strain and constant initial elastic modulus. Cyclic loading above 20% strain resulted in 70% increase in tensile strength, from 638±98 MPa to 1091±110 MPa, and 70% increase in toughness, while maintaining the ultimate tensile strain of collagen fibrils not subjected to cyclic loading. Throughout cyclic stretching, the fibrils maintained a steady-state hysteresis, yielding loss coefficients that are 5–10 times larger than those of known homogeneous materials in their modulus range, thus establishing damping of nanoscale collagen fibrils as a major component of damping in tissues.
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影响因子：
14
作者：
KATO, YP;SILVER, FH
通讯作者：
SILVER, FH
影响因子：
2.8
作者：
Miyazaki, Hiroshi;Hayashi, Kozaburo
通讯作者：
Hayashi, Kozaburo
影响因子：
3.4
作者：
Hu, Yizhong;Birman, Victor;Genin, Guy M.
通讯作者：
Genin, Guy M.
DOI：
10.1073/pnas.1523228113
发表时间：
2016-07-26
影响因子：
11.1
作者：
Dittmore, Andrew;Silver, Jonathan;Neuman, Keir C.
通讯作者：
Neuman, Keir C.
DOI：
10.1016/j.jmbbm.2014.07.008
发表时间：
2015-12
影响因子：
3.9
作者：
Depalle B;Qin Z;Shefelbine SJ;Buehler MJ
通讯作者：
Buehler MJ