New fixation set-up designed for micro-tensile test
10.3969/j.issn.1001-3733.2015.04.01
- VernacularTitle:新型试样固定装置在微拉伸测试中的应用
- Author:
Shuai LU
;
Sanjun ZHAO
;
Yong SUN
;
Peng LI
;
Jihua CHEN
- Publication Type:Journal Article
- Keywords:
Micro-tensile test;
Failure mode;
Stress distribution;
Finite element analysis(FEA)
- From:
Journal of Practical Stomatology
2015;(4):455-459
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To introduce a new fixation set-up for micro-tensile test.Methods:Dentin-composite were bonded with AdperTM Single Bond 2 (SB2)and sectioned into stick-shaped specimens.Specimens from each tooth(n =6)were equally divided into Ciucchi's jig and the designed set-up(Control and experimental)groups for micro-tensile bond test according to the utilized fixa-tion set-up.The bonding interface failure mode was examined with field-emission scanning electron microscope (FESEM).Three-dimensional models of the two set-ups and the specimen were developed,stress distribution was analyzed by finite element analysis (FEA).Results:The bond strength(MPa)of experimental and control group was 32.76 ±7.43 and 43.58 ±4.72(P <0.05),the ratio of mixed failure was 28 /36 and 20 /36(P <0.05)respectively.FEA showed that the designed set-up for fixing the sticks pro-vided a uniform stress distribution along the long axis of the specimen.FEA and failure mode analysis confirmed such uniform distri-bution was also concentrated at the bonding interface.Conclusion:The new set-up is feasible for micro-tensile test.
