J-INTEGRAL MEASUREMENTS OF ULTRA HIGH MOLECULAR-WEIGHT POLYETHYLENE
J-INTEGRAL MEASUREMENTS OF ULTRA HIGH MOLECULAR-WEIGHT POLYETHYLENE
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DOI：
10.1002/pen.760282403
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发表时间：
1988-12-01
影响因子：
3.2
通讯作者：
KLEIN, RW
中科院分区：
文献类型：
--
作者：
RIMNAC, CM;WRIGHT, TM;KLEIN, RW
超高分子量聚乙烯（UHMWPE）的断裂影响了全关节置换术部件关节表面的损伤模式。为了通过优化部件设计将损伤降至最低，需要了解超高分子量聚乙烯的断裂行为。采用断裂/力学方法，对两种厚度的三点弯曲试件进行J积分试验。jic值为99.5 kJ/m2，与试样厚度无关。两种试样厚度的断口表面都表现出广泛的取向和多层材料的破坏，这表明无论厚度如何，超高分子量聚乙烯在裂纹尖端都经历了平面应力状态。
Fracture of ultra high molecular weight polyethylene (UHMWPE) contributes to damage modes occurring on the articulating surfaces of total joint replacement components. To minimize damage through the optimization of component design requires an understanding of the fracture behavior of UHMWPE. A fracture/mechanics approach was taken in which J integral tests were performed on three‐point bend specimens of two thicknesses. JICwas determined to be 99.5 kJ/m2and was independent of specimen thickness. The fracture surfaces for both specimen thicknesses showed extensive orientation and failure through multiple layers of material, suggesting that UHMWPE experiences plane stress conditions at the crack tip, regardless of thickness.