@article{oai:niigata-u.repo.nii.ac.jp:00001558,
 author = {Kobayashi, Koichi and Kakinoki, Toshihiko and Sakamoto, Makoto and Tanabe, Yuji},
 issue = {2},
 journal = {Bio-Medical Materials and Engineering, Bio-Medical Materials and Engineering},
 month = {},
 note = {The effects of strain rate and low-gamma irradiation on the compressive properties of ultra-high molecular-weight polyethylene (UHMWPE) were investigated. Gamma irradiation was performed at 30 kGy in nitrogen or at 29 kGy in air without post-irradiation treatment. Quasi-static and impact compressive tests using the split-Hopkinson pressure-bar technique were performed to measure stress-strain relations up to a true strain of 8% at strain rates of between 0.0004 and 260 s(-1). For both unirradiated and gamma-irradiated UHMWPE specimens, an increase in the strain rate significantly increased the Young's modulus and the 0.5% yield stress. Gamma irradiation in air significantly increased the Young's modulus, as determined by quasi-static and impact compressive testing, and the 0.5% yield stress, as determined by impact compressive testing. The strain-rate dependence in the power-law relationship was similar to that observed for strain rates ranging from 0.02 to 0.10 s(-1) (Kurtz et al., Biomaterials 23, 2002, pp. 3681-3697).},
 pages = {87--95},
 title = {The effects of strain rate and low-gamma irradiation on the compressive properties of UHMWPE},
 volume = {17},
 year = {2007}
}