Elastic-plastic analysis considered residual stresses in the acetabular cup to estimate the pull-out force in the artificial hip joint with the structure for preventing dislocation

2020 ◽  
Vol 2020.31 (0) ◽  
pp. 1B30
Author(s):  
Yuki KAWAMURA ◽  
Mitsushi OHMASA ◽  
Ei YAMAMOTO
Keyword(s):  
Residual Stresses ◽  
Hip Joint ◽  
Acetabular Cup ◽  
Elastic Plastic ◽  
Pull Out ◽  
Artificial Hip Joint ◽  
Artificial Hip ◽  
Plastic Analysis

LOAD TRANSMISSION THROUGH ARTIFICIAL HIP JOINTS DUE TO STRESS WAVE LOADING

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1789-1794
Author(s):  
Y. TANABE ◽  
T. UCHIYAMA ◽  
H. YAMAOKA ◽  
H. OHASHI
Keyword(s):  
Hip Joint ◽  
Test Temperature ◽  
Impact Load ◽  
Force Transmission ◽  
Acetabular Cup ◽  
Load Transmission ◽  
Setting Angle ◽  
Artificial Hip Joint ◽  
Artificial Hip ◽  
The Impact

Since wear of the polyethylene (Ultra High Molecular Weight Polyethylene or UHMWPE) acetabular cup is considered to be the main cause of loosening of the artificial hip joint, the cross-linked UHMWPE with high durability to wear has been developed. This paper deals with impact load transmission through the complex of an artificial hip joint consisting of a UHMWPE acetabular cup (or liner), a metallic femoral head and stem. Impact compressive tests on the complex were performed using the split-Hopkinson pressure bar apparatus. To investigate the effects of material (conventional or cross-linked UHMWPE), size and setting angle of the liner, and test temperature on force transmission, the impact load transmission ratio (ILTR) was experimentally determined. The ILTR decreased with an increase of the setting angle independent of material and size of the liner, and test temperature. The ILTR values at 37°C were larger than those at 24 °C and 60°C. The ILTR also appeared to be affected by the type of material as well as size of the liner.

Mechanical Properties of Carbon/PEEK Composites According to the Fiber Ply Orientation and Sizing Removal of Carbon Fiber for Artificial Hip Joint

2013 ◽  
Vol 750-752 ◽  
pp. 164-175 ◽  
Author(s):  
Yun Hae Kim ◽  
Sung Won Yoon ◽  
Jin Woo Lee ◽  
Tae Hyun Kim ◽  
Min Kyo Jung ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Tensile Test ◽  
Epoxy Resin ◽  
Hip Joint ◽  
Mechanical Test ◽  
Epoxy Composites ◽  
Pull Out ◽  
Artificial Hip Joint ◽  
Artificial Hip

The purpose of this study is to determine the correct estimation of the mechanical property between epoxy resin and PEEK sheet as the composites and its validity has been tested with the alternative materials of the metal-based materials for artificial hip joint. Moreover, this work evaluated the mechanical properties according to the temperature of heat treatments for sizing removal of carbon fiber and the fractured surfaces of Carbon/Epoxy and Carbon/PEEK composites were also evaluated. First, the sizing removal of carbon fiber were conducted at 300°C for 4 hours and 400°C for 2 hours. The fractured surface in the specimen of tensile test made from PEEK and epoxy resin was observed by SEM. the fracture surface of the tensile test specimen of the Carbon/Epoxy composites heat-treated to 400°C showed that the resin did not bury nearly in the fiber surface and pull out was observed. It is shown that 400°C is suitable for the sizing removal of the carbon fiber. The mechanical test result showed that there was no significant differences in short beam strength. However, the tensile strength and compressive strength of the Carbon/PEEK composites was higher than those of the Carbon/Epoxy composites in the case of the Vacuum Bag process. In addition, this result showed that the sizing material did not have a significant effect on the strength of the Carbon/PEEK composites.

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