This study aimed to develop an approach for the understanding of the relationship between the contact interaction properties of lugs and their strength and mass to design efficient and lightweight lugs for aerospace c...This study aimed to develop an approach for the understanding of the relationship between the contact interaction properties of lugs and their strength and mass to design efficient and lightweight lugs for aerospace components.Lugs are crucial components of many aerospace mechanisms,and their properties are closely linked to their contact interactions with bushings.The approach taken in this study involved modeling the adhesive layer between the lug and bushing and optimizing the dimensions of the polymer lug and metal bushing to minimize the lug’s mass while maintaining adequate strength.Finite element analysis(FEA)and cohesive zone modeling(CZM)were used to simulate the effects of primary properties of contact interaction between lug body and bushing on the strength and mass of the lug,and both gradient-free and gradient-based optimization algorithms were employed to minimize the lug’s mass while maintaining its strength.The results showed that increasing shear and tensile contact strengths reduced the resulting mass,with tangential stress having the greatest effect.Moreover,increasing contact strength reduced the required dimensions of the lug and bushing,indicating the possibility of reducing the mass of the bushing–lug assembly using rougher bushings or ribbing.展开更多
We study the blow-up solutions for the Davey-Stewartson system（D-S system, for short）in L2x（R2）. First, we give the nonlinear profile decomposition of solutions for the D-S system. Then, we prove the existence of ...We study the blow-up solutions for the Davey-Stewartson system（D-S system, for short）in L2x（R2）. First, we give the nonlinear profile decomposition of solutions for the D-S system. Then, we prove the existence of minimal mass blow-up solutions. Finally, by using the characteristic of minimal mass blow-up solutions, we obtain the limiting profile and a precisely mass concentration of L2 blow-up solutions for the D-S system.展开更多
基金financially supported by the Russian Science Foundation,project no.22-79-10309.
文摘This study aimed to develop an approach for the understanding of the relationship between the contact interaction properties of lugs and their strength and mass to design efficient and lightweight lugs for aerospace components.Lugs are crucial components of many aerospace mechanisms,and their properties are closely linked to their contact interactions with bushings.The approach taken in this study involved modeling the adhesive layer between the lug and bushing and optimizing the dimensions of the polymer lug and metal bushing to minimize the lug’s mass while maintaining adequate strength.Finite element analysis(FEA)and cohesive zone modeling(CZM)were used to simulate the effects of primary properties of contact interaction between lug body and bushing on the strength and mass of the lug,and both gradient-free and gradient-based optimization algorithms were employed to minimize the lug’s mass while maintaining its strength.The results showed that increasing shear and tensile contact strengths reduced the resulting mass,with tangential stress having the greatest effect.Moreover,increasing contact strength reduced the required dimensions of the lug and bushing,indicating the possibility of reducing the mass of the bushing–lug assembly using rougher bushings or ribbing.
基金Supported by National Natural Science Foundation of China(Grant No.11371267)Research Fund for the Doctoral Program of Higher Education of China(Grant No.20125134120001)
文摘We study the blow-up solutions for the Davey-Stewartson system（D-S system, for short）in L2x（R2）. First, we give the nonlinear profile decomposition of solutions for the D-S system. Then, we prove the existence of minimal mass blow-up solutions. Finally, by using the characteristic of minimal mass blow-up solutions, we obtain the limiting profile and a precisely mass concentration of L2 blow-up solutions for the D-S system.
