The compressive response of porcine adipose tissue from low to high strain rate

详细信息	查看全文 | 推荐本文 |

• 作者：Kerstyn Comley ; Norman Fleck ; ^{naf1@eng.cam.ac.uk}
• 关键词：Adipose tissue ; Split Hopkinson pressure bar ; Constitutive testing ; Ogden model
• 刊名：International Journal of Impact Engineering
• 出版年：2012
• 期刊代码：82_0734743x
• 类别：et
• 出版时间：August, 2012
• 卷：46
• 期：Complete
• 页码：1-10
• 文件大小：1616 K

摘要

Subcutaneous adipose tissue has been tested in uniaxial compression over a wide range of strain rates from quasi-static to 5700聽s^鈭?. In the quasi-static regime, the tissue was subjected to fully reversed cyclic loading. A symmetric tensile-compressive response was observed with lock-up at tensile and compressive strains of 25%. Uniaxial compressive tests at high strain rates (1000聽s^鈭?-5700聽s^鈭?) were conducted with a split Hopkinson pressure bar (SHPB) using polycarbonate bars. Over the full range of strain rate from quasi-static to high strain rate, the magnitude of stress increases with strain rate whereas the shape of the stress versus strain response is invariant: the stress level scales with the initial modulus E. A one term Ogden energy density function is adequate for describing the shape of the stress versus strain response at any given strain rate.