SYMPOSIA PAPER Published: 01 January 1989

Calculation and Experimental Analysis of Forces and Stresses in Intramedullary Nail Models


One open cylindrical tube made from shape memory alloy of 55% nickel and 45% titanium (NiTi) was tested. The activated total radial force was measured between rigid plates, when the tube was heated by hot water. Three NiTi tubes of 10-mm length were inserted into biomechanical equivalent aluminum tubes and heated in order to measure the deformation of the model tubes. Photoelastic tests were performed on three NiTi tube specimens, 2.5 mm in length, which had been inserted into biomechanical equivalent Araldite disks of 10-mm thickness. All tests were evaluated by combining the results with calculations on slender circular rings and were transmitted to natural bone tubes. The results show activated stresses between 15 and 30 N/mm2 in real bone and therefore no dangerous stress states.

Author Information

Baumgart, F
Ruhr University, Bochum, Federal Republic of Germany
Becker, HJ
Krupp Forschungsinstitut, Essen, Federal Republic of Germany
Price: $25.00
Contact Sales
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Developed by Committee: F04
Pages: 10–19
DOI: 10.1520/STP10362S
ISBN-EB: 978-0-8031-5073-7
ISBN-13: 978-0-8031-1181-3