Metal matrix composites reinforced with graphite particles provide better machinability and tribological properties. The present study attempts to find the optimal level of machining parameters for multi-performance c...Metal matrix composites reinforced with graphite particles provide better machinability and tribological properties. The present study attempts to find the optimal level of machining parameters for multi-performance characteristics in turning of Al-SiC-Gr hybrid composites using grey-fuzzy algorithm. The hybrid composites with 5%, 7.5% and 10% combined equal mass fraction of SiC-Gr particles were used for the study and their corresponding tensile strength values are 170, 210, 204 MPa respectively. Al-10%（SiC-Gr） hybrid composite provides better machinability when compared with composites with 5% and 7.5% of SiC-Gr. Grey-fuzzy logic approach offers improved grey-fuzzy reasoning grade and has less uncertainties in the output when compared with grey relational technique. The confirmatory test reveals an increase in grey-fuzzy reasoning grade from 0.619 to 0.891, which substantiates the improvement in multi-performance characteristics at the optimal level of process parameters setting.展开更多
犹豫模糊集作为模糊集的最新扩展形式,在处理部分确定、部分不确定新方面有其独特的优势.在现实的犹豫模糊决策中,决策信息往往呈现部分信息已知,部分信息未知的特征,体现为灰信息的形式.基于此,文中提出了一种新的灰色犹豫模糊集合(gra...犹豫模糊集作为模糊集的最新扩展形式,在处理部分确定、部分不确定新方面有其独特的优势.在现实的犹豫模糊决策中,决策信息往往呈现部分信息已知,部分信息未知的特征,体现为灰信息的形式.基于此,文中提出了一种新的灰色犹豫模糊集合(gray hesitant fuzzy set,GHFS),将犹豫模糊集扩展到灰集领域.文章还给出了灰犹豫模糊元的距离计算公式,提出了GHFS的灰关联加权和TOPSIS(technique for order preference by similarity to an ideal solution)决策方法.专业市场发展策略的算例表明了方法的有效性与实用性.展开更多
文摘Metal matrix composites reinforced with graphite particles provide better machinability and tribological properties. The present study attempts to find the optimal level of machining parameters for multi-performance characteristics in turning of Al-SiC-Gr hybrid composites using grey-fuzzy algorithm. The hybrid composites with 5%, 7.5% and 10% combined equal mass fraction of SiC-Gr particles were used for the study and their corresponding tensile strength values are 170, 210, 204 MPa respectively. Al-10%（SiC-Gr） hybrid composite provides better machinability when compared with composites with 5% and 7.5% of SiC-Gr. Grey-fuzzy logic approach offers improved grey-fuzzy reasoning grade and has less uncertainties in the output when compared with grey relational technique. The confirmatory test reveals an increase in grey-fuzzy reasoning grade from 0.619 to 0.891, which substantiates the improvement in multi-performance characteristics at the optimal level of process parameters setting.
文摘犹豫模糊集作为模糊集的最新扩展形式,在处理部分确定、部分不确定新方面有其独特的优势.在现实的犹豫模糊决策中,决策信息往往呈现部分信息已知,部分信息未知的特征,体现为灰信息的形式.基于此,文中提出了一种新的灰色犹豫模糊集合(gray hesitant fuzzy set,GHFS),将犹豫模糊集扩展到灰集领域.文章还给出了灰犹豫模糊元的距离计算公式,提出了GHFS的灰关联加权和TOPSIS(technique for order preference by similarity to an ideal solution)决策方法.专业市场发展策略的算例表明了方法的有效性与实用性.
