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Vol. 152, No. 5, May 2013, pp. 27-32




Using Displacement Sensor to Determinate the Fracture Toughness of PMMA Bone Cement
1 Yongzhi Xu, 2 Youzhi Wang, 3Guozhi Tian

1,2 School of Civil Engineering, Shandong University, Jingshi road 17923#, Jinan, 250061, PR China

3 Shandong Transport Vocational College, Weifang, 261206, China

2 Tel.: 13153600920, fax: 0531-88392696

2 E-mail: xyz2003sdu@163.com


Received: 14 April 2013   /Accepted: 15 May 2013   /Published: 27 May 2013

Digital Sensors and Sensor Sysstems


Abstract: Polymethylmethacrylate-based (PMMA) bone cements incorporating multiwalled carbon nanotubes (MWCNTs) as a means of reinforcement were prepared, and their structure and properties were investigated by displacement sensor and chevron-notched test method. The aim of this study was to determine the transverse-direction fracture toughness (KIv) in PMMA bone cement by using the displacement sensor. Three major advantages of the displacement sensor test method are: (1) It is easier to achieve the plane strain requirements; (2) Not required to make the fatigue-precracking; (3) It is considerable easy to produce stable crack propagation before completely fracture. The fracture toughness values of PMMA bone cement and PMMA/MWNCTs bone cement were measured to be 1.2350.15 MPa m1/2 and 1.7250.15 MPa m1/2, respectively. Based on the microstructures shown in SEM images, the improved fracture toughness of PMMA bone cement was contributed to the incorporation of surface functionalized MWCNTs.


Keywords: Strain transducer, Fracture toughness, Mechanical properties, Chevron-notched



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