CAJ | 학술논문

背景:烤瓷熔附金属的物理性质同其各组分的性质明显不同又受到其影响,大多复合材料的力学性质可用混合律来预测,但烤瓷熔附金属力学性质的影响因素非常多,预测的结果明显偏大,因此有必要将其力学性质与材料力学的理论分析通过数学模型联系起来,以指导其使用.目的:探讨对烤瓷熔附金属修复材料进行力学分析的实验与计算方法,分析其相关程度和内在联系.设计:分别利用三点弯曲实验,参照复合材料混合律测试并计算材料的强度和模量,将实验与计算所得结果进行比较.单位:四川大学华西口腔医学院口腔修复科.材料:制作不同金瓷比,外形为26 mm×4 mm×1.5 mm的烤瓷熔附金属试件15个,分5组,每组3个.方法:采用三点弯曲实验测量烤瓷熔附金属弯曲强度及弹性模量,观察其变化规律,并与理论计算值比较,讨论其相关性.主要观察指标:烤瓷熔附金属材料实验及理论计算结果及二者的比较.结果:实验测量结果与理论计算结果有明显相关性,可以通过修正的理论公式来预测烤瓷熔附金属的力学性质.结论:烤瓷熔附金属各组分的几何形态参数和力学参数与其总体力学性质有规律关系,可以用通过校正的理论公式进行预测和改进.
배경:고자용부금속적물이성질동기각조분적성질명현불동우수도기영향,대다복합재료적역학성질가용혼합률래예측,단고자용부금속역학성질적영향인소비상다,예측적결과명현편대,인차유필요장기역학성질여재료역학적이론분석통과수학모형련계기래,이지도기사용.목적:탐토대고자용부금속수복재료진행역학분석적실험여계산방법,분석기상관정도화내재련계.설계:분별이용삼점만곡실험,삼조복합재료혼합률측시병계산재료적강도화모량,장실험여계산소득결과진행비교.단위:사천대학화서구강의학원구강수복과.재료:제작불동금자비,외형위26 mm×4 mm×1.5 mm적고자용부금속시건15개,분5조,매조3개.방법:채용삼점만곡실험측량고자용부금속만곡강도급탄성모량,관찰기변화규률,병여이론계산치비교,토론기상관성.주요관찰지표:고자용부금속재료실험급이론계산결과급이자적비교.결과:실험측량결과여이론계산결과유명현상관성,가이통과수정적이론공식래예측고자용부금속적역학성질.결론:고자용부금속각조분적궤하형태삼수화역학삼수여기총체역학성질유규률관계,가이용통과교정적이론공식진행예측화개진.
BACKGROUND: The physical property of porcelain fused to metal (PFM) differs from those of its constituents, which nake impacts on PFM,and the mechanical property of most composites can be estimated with mixture rule. However, there are various factors influencing the mechanical property of PFM and great differences found in the estimations, thus it is necessary to combine the theoretical analysis of mechanical property and mechanics of materials by matbematical models, and provide guidances for PFM' s application.OBJECTIVE: To explore the experiment and computing methods of mechanical analysis on PFM repair materials, and analyze its correlativity and internal relation.DESIGN: Three-point bending experiment and mixture rule of the composites were applied to measure and calculate the intensity and modulus of materials, and then the experimental results and computations were compared.SETTING: Repair Department of Stomatology, West China Stomatological College.MATERIALS: According to the different metal-porcelain ratios, 15 PFM test pieces of 26 mm×4 mm×1.5 mm were divided into 5 groups, with 3 in each.METHODS: Three-point bending experiment was used to detect the bending level and elastic modulus of PFM, whose changing rule was observed,and then was compared with theoretical computed value as well as study the correlation.MAIN OUTCOME MEASURES: PFM experimental result, theoretical computation and the comparison of the two,RESULTS: There were obvious correlations between the experimental measurement and theoretical results, which indicated that the mechanical property of PFM could be predicted by the revised formula.CONCLUSION: The mechanical property of PFM has regular relations with the geometrical morphous parameter and mechanical parameter of PFM constituents, and can be predicted and improved by revised theoretical formula.