This paper seeks to outline a novel three-layer model and a new birth-dteath element solution technique to evaluate static strength of notched metallic panel repaired with bonded com- posite patch and to optimize mate...This paper seeks to outline a novel three-layer model and a new birth-dteath element solution technique to evaluate static strength of notched metallic panel repaired with bonded com- posite patch and to optimize material parameters. The higher order 3D, 8-node isotropic solid ele- ment and 8-node anisotropic layered solid element with three degrees of freedom per node are respectively implemented to model substrate panel, adhesive layer and composite patch to establish three-layer model of repaired panel. The new solving technique based on birth-death element is developed to allow solution of the stress pattern of repaired panel for identifying failure mode. The new model and its solution are used to model failure mode and residual strength of repaired panel, and the obtained results have a good agreement with the experimental findings. Finally, the influences of material parameter of adhesive layer and composite patch on the residual strength of repaired panel are investigated for optimizing material properties to meet operational and envi- ronmental constraints.展开更多
新冠疫情影响及移动互联时代的迅猛发展,学术直播活动异军突起。通过《航空学报》《Chinese Journal of Aeronautics》(以下简称“两刊”)的直播活动实践,从5个层面总结直播成效影响因素:优质内容选择,主播的行业知名度和号召力,直播覆...新冠疫情影响及移动互联时代的迅猛发展,学术直播活动异军突起。通过《航空学报》《Chinese Journal of Aeronautics》(以下简称“两刊”)的直播活动实践,从5个层面总结直播成效影响因素:优质内容选择,主播的行业知名度和号召力,直播覆盖的受众画像,合适的直播平台,恰当的营销宣传;探析学术直播助力期刊影响力提升的层面:助推行业发展,积极塑造品牌,编辑涵义更加多元。同时以两刊的直播实践思考学术直播的未来走向及可持续发展的可能,为学术期刊建立更为有效的传播途径、加快融合发展提供借鉴。展开更多
基金supported by the National Natural Science Foundation (No. 51075019)Aeronautical Science Foundation of China (No. 20095251024)
文摘This paper seeks to outline a novel three-layer model and a new birth-dteath element solution technique to evaluate static strength of notched metallic panel repaired with bonded com- posite patch and to optimize material parameters. The higher order 3D, 8-node isotropic solid ele- ment and 8-node anisotropic layered solid element with three degrees of freedom per node are respectively implemented to model substrate panel, adhesive layer and composite patch to establish three-layer model of repaired panel. The new solving technique based on birth-death element is developed to allow solution of the stress pattern of repaired panel for identifying failure mode. The new model and its solution are used to model failure mode and residual strength of repaired panel, and the obtained results have a good agreement with the experimental findings. Finally, the influences of material parameter of adhesive layer and composite patch on the residual strength of repaired panel are investigated for optimizing material properties to meet operational and envi- ronmental constraints.
文摘新冠疫情影响及移动互联时代的迅猛发展,学术直播活动异军突起。通过《航空学报》《Chinese Journal of Aeronautics》(以下简称“两刊”)的直播活动实践,从5个层面总结直播成效影响因素:优质内容选择,主播的行业知名度和号召力,直播覆盖的受众画像,合适的直播平台,恰当的营销宣传;探析学术直播助力期刊影响力提升的层面:助推行业发展,积极塑造品牌,编辑涵义更加多元。同时以两刊的直播实践思考学术直播的未来走向及可持续发展的可能,为学术期刊建立更为有效的传播途径、加快融合发展提供借鉴。
