Session: Research Posters

Paper Number: 120165

120165 - Review of the Customized Test Methods for the Biological-Materials: Conformity With the Laboratory Essentials 

The nature of biological materials demands the customization of test methods.  The development of a compact specimen to test bone and other compatible materials began in early 1990s.  The specimen has the overall specimen configuration of a compact tension specimen and the region around the crack path remains as bone and the rest of the portion may be substituted with a compatible material.  Thorough evolution of test methods to test the linear elastic fracture mechanics properties and indirect interpretation of various comprehensive properties prompted for carrying out the studies for evaluating the interfacial fracture toughness, the suitability of some of the small laboratory animals in order to test the new designs of prosthesis, the orientation dependence of fracture toughness of bone, and the inter relation between the fracture mechanics parameters.  Eventually address of the specimen size and other test requirements for standardizing the test procedures in order to measure the fracture mechanics parameters further refined the specimen.  Authentication of the use of the specimen in wet and dry conditions successfully evaluated the interspecies fracture toughness study and measured the fracture toughness of bone and bone-biomaterial interface in different modes.  Observance of loads and constraints of the specimen prompted for revalidation of the methods in use like the method of application of the load and its effect on the measurement of the material properties using the specimen.  A well established fact that the fracture toughness of bone and bone-biomaterial interface exhibit sensitivity to the fracture mechanics parameters other than LEFM, prompted for the evaluation of other fracture mechanics properties as well.  Furthermore the uncertainty analysis of the specimen and the objectives of the evolution of the specimen prompted for choosing the preference of measuring the energy release rate and lead to the proposition of  the specimen for the use of the lowest possible size of bone sample with the use of the laboratory equipment.  Analytical, numerical, experimental, and qualitative analysis state that a test sample that is as smaller as 2.7 cmm may be tested using the commercial and precision laboratory resources.  The analysis ensured the accountability of catastrophic as well as stable crack propagation during the test, in order to meet the test objectives.  Uncertainty analysis showed that the specimen uses bone sample of the aforesaid size.  Bone and other size effective materials and the materials that cannot resist the deviation from the laboratory ambience may be effectively tested using the compact sandwich specimen.  

Presenting Author: Tejaswi Chilukuri VNRVJIET

Presenting Author Biography: VNRVJIET

Authors:

Satya Prasad Paruchuru VNRVJIET
Tejaswi Chilukuri VNRVJIET