Mechanics of Sandwich Structures最新文献_第2页

Failure of Impact Damaged Foam Core Sandwich Beams 冲击损伤泡沫芯夹层梁失效研究

Mechanics of Sandwich Structures Pub Date : 2000-11-05 DOI: 10.1115/imece2000-2020

S. Hallström, A. Shipsha, D. Zenkert

引用次数: 3

Influence of Core on Face/Core Debond Toughness 岩心对面/岩心剥离韧性的影响

Mechanics of Sandwich Structures Pub Date : 2000-11-05 DOI: 10.1115/imece2000-2026

Gilmer M. Viana Camps, L. Carlsson, Xiaoming Li

引用次数: 3

Effects of Interfacial Delaminations in Curved Sandwich Beams 弯曲夹层梁中界面分层的影响

Mechanics of Sandwich Structures Pub Date : 2000-11-05 DOI: 10.1115/imece2000-2030

Andrew M. Layne, L. Carlsson

引用次数: 0

Sandwich Structures for Naval Ships: Design and Experience 海军舰艇夹层结构:设计与经验

Mechanics of Sandwich Structures Pub Date : 2000-11-05 DOI: 10.1115/imece2000-2019

K. Olsson

{"title":"Sandwich Structures for Naval Ships: Design and Experience","authors":"K. Olsson","doi":"10.1115/imece2000-2019","DOIUrl":"https://doi.org/10.1115/imece2000-2019","url":null,"abstract":"\u0000 In Sweden we have a long experience with different types of vehicles and ships in sandwich construction, especially Navy ships such as minesweepers, mine-counter-measure-vessels and corvettes. GRP (Glass fibre Reinforced Plastic) and FRP (Fibre Reinforced Plastics) have been the most common face materials, but metallic materials such as Al-alloys, coated carbon steel and stainless steel have also been used. Core materials have usually been cellular plastic foams of cross-linked PVC (Polyvinyl-chloride), but also extruded PS (Poly-styrene), PUR (Poly-urethane), PEI (Poly-ether-imide) and PMI (Poly-methacryl-imide). Different continuous and discontinuous manufacturing processes have been used. Vacuum assisted infusion has been introduced recently, because it is a closed process, gives high fibre content and a good quality of the laminates. Sandwich design has mainly been used in the transportation area, where lightweight design is needed to give higher performance and load bearing capacity. The use of sandwich construction will give high stiffness- and strength-to weight ratio. This is usually not enough from an economic point of view to justify the introduction of sandwich construction, but other integrated functions must be considered, i.e. insulation, energy consumption, damping, fewer components, lower manufacturing costs, low maintenance, signature effects (military) etc.","PeriodicalId":104214,"journal":{"name":"Mechanics of Sandwich Structures","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126190431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Behavior of Unidirectional Sandwich Panels With a Bi-Linear “Soft” Core: High Order Approach 具有双线性“软”芯的单向夹层板的性能:高阶方法

Mechanics of Sandwich Structures Pub Date : 2000-11-05 DOI: 10.1115/imece2000-2041

H. Schwarts-Givli, Y. Frostig

引用次数: 2

Comparative Study of Two Different Conceptual Design Principles for Non-Circular Pressurized Sandwich Fuselage Sections Using a High-Order Sandwich Theory Formulation 基于高阶夹层理论公式的非圆加压夹层机身截面两种不同概念设计原则的比较研究

Mechanics of Sandwich Structures Pub Date : 2000-11-05 DOI: 10.1115/imece2000-2033

O. Thomsen, J. Vinson

{"title":"Comparative Study of Two Different Conceptual Design Principles for Non-Circular Pressurized Sandwich Fuselage Sections Using a High-Order Sandwich Theory Formulation","authors":"O. Thomsen, J. Vinson","doi":"10.1115/imece2000-2033","DOIUrl":"https://doi.org/10.1115/imece2000-2033","url":null,"abstract":"\u0000 Results obtained as part of a design study regarding a non-circular pressurized sandwich fuselage section are presented. The originating problem is associated with preliminary studies for the “Global Range Transport” envisaged by the “New World Vistas” program of the United States Air Force. The modeling and analysis is conducted using a high-order sandwich theory formulation in which the elastic response of each face laminate is accounted for, including bending-stretching coupling and transverse shear deformations, and where the transverse flexibility of the core is included. The sandwich fuselage envisaged may contain flat, tapered and curved sandwich elements, and a high-order sandwich theory formulation is developed to analyze each of these configurations. The paper includes a brief presentation of the adopted high-order sandwich theory with special emphasis on the application for the analysis of sandwich panels with variable core thickness, and for the analysis of curved sandwich panels. Numerical results obtained for two different mid-plane asymmetric fuselage sections are presented and compared; one with constant core thickness, and one with varying core thickness.","PeriodicalId":104214,"journal":{"name":"Mechanics of Sandwich Structures","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132384596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Real Time Experimental Investigation of Dynamic Failure Mode Selection in Sandwich Structures 夹层结构动态破坏模式选择的实时试验研究

Mechanics of Sandwich Structures Pub Date : 2000-11-05 DOI: 10.1115/imece2000-2022

L. Xu, A. Rosakis

{"title":"Real Time Experimental Investigation of Dynamic Failure Mode Selection in Sandwich Structures","authors":"L. Xu, A. Rosakis","doi":"10.1115/imece2000-2022","DOIUrl":"https://doi.org/10.1115/imece2000-2022","url":null,"abstract":"\u0000 Past studies of dynamic failure in sandwich structures have mostly been concerned with post-mortem investigations of failure patterns resulting from the dynamic loading of such structures through projectile impact. The final fracture patterns have typically been very complex and their time sequence, interdependence, and detailed nature (opening versus shear) were unclear. In the present work we concentrated on the real-time investigation of the generation and the subsequent evolution of dynamic failure that occurred within microseconds after impact. Model sandwich structures involving a combination of transparent polymers and metals (typically tri-layers bonded together by weak or strong adhesives) were designed and subjected to impact loadings to study the failure evolution mechanism. High-speed photography and dynamic photoelasticity were utilized to study the nature and the sequence of failure modes. A series of complex failure modes was observed. In most cases, interfacial cracks (dynamic delamination) appeared first. These cracks were shear dominated and were often intersonic. Thus, initial delamination was found to be shear driven and happen at extremely short time scales even at moderate impact speeds ranging between 20 to 50 m/s. The transition behavior between interlayer crack growth and intralayer crack formation was also observed. Opening (subsonic) intralayer cracks kinking from the dynamic shear delamination propagated into the core layer of the model sandwich structure and eventually branched as they reached a high enough growth speed.","PeriodicalId":104214,"journal":{"name":"Mechanics of Sandwich Structures","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133988995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Failure Behavior of Closed Cell Foams 闭孔泡沫的破坏行为

Mechanics of Sandwich Structures Pub Date : 2000-11-05 DOI: 10.1115/imece2000-2029

R. M. Christensen, S. Deteresa

引用次数: 3

High-Order Analysis of Unidirectional Sandwich Panels With Flat and Generally Piecewise Curved Faces and a “Soft” Core 具有平面和一般分段曲面和“软”芯的单向夹层板的高阶分析

Mechanics of Sandwich Structures Pub Date : 2000-11-05 DOI: 10.1115/imece2000-2037

Oded Rabinovich, Y. Frostig

{"title":"High-Order Analysis of Unidirectional Sandwich Panels With Flat and Generally Piecewise Curved Faces and a “Soft” Core","authors":"Oded Rabinovich, Y. Frostig","doi":"10.1115/imece2000-2037","DOIUrl":"https://doi.org/10.1115/imece2000-2037","url":null,"abstract":"\u0000 The bending behavior of a unidirectional sandwich panel with flat and generally piecewise curved faces and a flexible core in the vertical direction is investigated. The studied panels consist of an upper flat face sheet, a core of a variable thickness, and a lower face sheet that can take any geometrical layout described by a piecewise analytical function. The core is assumed to be a two-dimensional elastic medium with vertical and shear rigidities only, and the faces are considered to have membrane and bending rigidities and are made of metallic or composite materials. The field equations and the boundary conditions are rigorously derived using the variational principle of virtual work. The continuity conditions between the various regions of the generally piecewise curved face are presented. Higher order effects in the form of nonlinear deformation distributions through the thickness due to flexibility of the core are incorporated in the proposed analysis. Numerical results in terms of deformations, stresses, and stress resultants are presented for some typical cases of piecewise flat-curved panels. The results demonstrate the capabilities and generality of the proposed model, especially in the ability to predict the high-order localized effects and the high stress concentrations that characterize these panels.","PeriodicalId":104214,"journal":{"name":"Mechanics of Sandwich Structures","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132090415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Asymptotic Solution for the Response of Face-Sheet Delaminations/Debonds Under Compression 压缩条件下面-板分层/脱粘响应的渐近解

Mechanics of Sandwich Structures Pub Date : 2000-11-05 DOI: 10.1115/imece2000-2031

G. Kardomateas, Haiying Huang

引用次数: 0