Response to fatigue stress of biomedical grade polyethylene joints welded by a diode laser.
biomechanical · Level V
Where this comes from
- Record sourced from PubMed, PMID 30016758.
- Also identified by DOI 10.1016/j.jmbbm.2018.07.006.
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Abstract
Biomedical grade UHMWPE double lap joint, welded by a diode laser, has been mechanically characterized by static and dynamic tests. A nanocomposite sheet (UHMWPE filled with low carbon nanoparticles amount) was interposed between two polymeric sheets in order to absorb the laser light, sealing the sheets by means of a melting process. Fatigue test has been performed in the joint with 0.016 wt% of carbon nanofiller for its best mechanical static resistance among those studied. Its fatigue limits resulted to be equal to 22000 cycles. Breaks occurred at the 2nd welded interface, where a poor melting process weakens the entire joint.
Medical subject headings
- Biocompatible Materials
- Lasers, Semiconductor
- Materials Testing
- Polyethylene
- Stress, Mechanical