American Society for Composites 2018最新文献_第8页

Progressive Damage and Failure Prediction of Interlaminar Tensile Specimen with Initial Fabrication Induced Defects 带有初始制造缺陷的层间拉伸试样的渐进损伤和失效预测

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/ASC33/26089

Xiaodong Cui, A. Karuppiah, D. Pham, J. Lua, C. Saathoff, W. Seneviratne

引用次数: 3

Microscale Analysis of Virtually Cured Polymer Matrix Composites Accounting for Uncertainty in Matrix Properties During Manufacturing 考虑制造过程中基体性能不确定性的虚拟固化聚合物基复合材料的微尺度分析

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/ASC33/25958

Sagar P. Shah, M. Maiarù

引用次数: 12

Effect of Manufacturing-Induced Voids on the Fatigue Performances of Multidirectional Laminates 制造诱导空洞对多向层压板疲劳性能的影响

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/ASC33/25994

M. Quaresimin, L. Maragoni, P. Carraro

引用次数: 0

Compressive Strength Prediction of 3D Woven Textile Composites: Single RVE Multiscale Analysis and Imperfection Sensitivity Study 三维纺织复合材料抗压强度预测:单RVE多尺度分析及缺陷敏感性研究

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/ASC33/26103

D. Patel, A. Waas

引用次数: 0

Molecular Dynamics Simulations of Fiber-Sizing Interphase 纤维上浆间相的分子动力学模拟

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/asc33/25917

S. Chowdhury, Ethan A. Wise, R. Elder, T. Sirk, D. Hartman, John Gillespie

引用次数: 0

A Novel Test Method to Induce Bi-Axial Stress States in Thin-Ply Carbon Composites Under Combined Longitudinal Tension and Transverse Compression 在纵向拉伸和横向压缩联合作用下诱导薄层碳复合材料双轴应力状态的新型测试方法

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/asc33/25937

Tamas Rev, G. Czél, M. Wisnom

引用次数: 3

A Continuum Damage Model for Fatigue and Its Integration Scheme 疲劳连续损伤模型及其积分方案

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/ASC33/26169

Z. Gao, Liang Zhang, R. Haynes, Wenbin Yu

引用次数: 0

Multiscale Modeling of the Impact Response of Triaxially Braided Polymer Matrix Composites, Including Effects of Adiabatic Heating 包括绝热加热影响的三轴编织聚合物基复合材料冲击响应的多尺度建模

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/ASC33/25997

C. Sorini, A. Chattopadhyay, R. Goldberg

{"title":"Multiscale Modeling of the Impact Response of Triaxially Braided Polymer Matrix Composites, Including Effects of Adiabatic Heating","authors":"C. Sorini, A. Chattopadhyay, R. Goldberg","doi":"10.12783/ASC33/25997","DOIUrl":"https://doi.org/10.12783/ASC33/25997","url":null,"abstract":"Significant local temperature rises often accompany the high rate deformation of polymer matrix composites. In the case of impact loading, heat is generated locally within the polymer matrix due to plastic dissipation, but the rapid nature of the loading precludes significant heat transfer from occurring; ballistic impact loading can therefore be regarded as fully adiabatic. In this paper, the development of a synergistic multiscale approach to simulate the architecturally dependent impact response of polymer matrix composites with complex fiber tow architectures is presented and applied to a representative triaxially braided composite material system. To approximate the heterogeneity of the composite braid architecture at the highest analysis length scale, a subcell-based approach is utilized whereby the mesoscale repeating unit cell of the material is discretized in-plane into an assemblage of laminated composite subcell regions, with stacking sequences determined from the braid architecture. Each unidirectional layer of the laminated composite subcells are modeled with the generalized method of cells micromechanics theory, where a nonisothermal viscoplastic constitutive model is employed to model the rate, temperature, and pressure dependent polymer matrix. Matrix temperature rises due to inelastic deformation are computed. in matrix elastic properties are determined from neat resin dynamic mechanical analysis data. The commercial transient dynamic finite element code LS-DYNA is utilized to conduct simulations of quasi-static coupon tests and flat panel impact tests performed on a T700/PR520 [0°/60°/–60°] triaxially braided composite. Good agreement is found between simulations and experiments. It is expected that, once progressive damage and failure are incorporated into the multiscale scheme, the incorporation of adiabatic heating affects will greatly improve the predictive capability of current models.","PeriodicalId":337735,"journal":{"name":"American Society for Composites 2018","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127160399","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

Reactive Molecular Dynamics Simulation of Accelerated Cross-linking and Disintegration of Bisphenol F/DETDA Polymer using ReaxFF 利用 ReaxFF 对双酚 F/DETDA 聚合物的加速交联和分解进行反应分子动力学模拟

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/ASC33/25939

Aniruddh Vashisth, Chowdhury M. Ashraf, C. Bakis, A. Duin

{"title":"Reactive Molecular Dynamics Simulation of Accelerated Cross-linking and Disintegration of Bisphenol F/DETDA Polymer using ReaxFF","authors":"Aniruddh Vashisth, Chowdhury M. Ashraf, C. Bakis, A. Duin","doi":"10.12783/ASC33/25939","DOIUrl":"https://doi.org/10.12783/ASC33/25939","url":null,"abstract":"Molecular dynamics simulations of polymers can help in understanding the dependence of molecular structure, cross-linking and the chemistry of the polymer chain and resulting thermo-mechanical properties of the polymer. Apart from these thermo-mechanical properties, molecular dynamics is also a powerful tool to examine the durability of polymers with potential aerospace applications under harsh environmental conditions. Ultraviolent radiation from the sun results in dissociation of molecular oxygen into atomic oxygen (AO) which is abundant in lower earth orbit. Testing composites under AO impact requires an extensive experimental setup to simulate low earth orbit (LEO) conditions and is therefore expensive. Using a newly developed accelerated cross-linking methodology in the framework of ReaxFF, bisphenol F and diethyltoluenediamine epoxy polymer chains are manufactured virtually. This simulated polymer is virtually tested for modulus, glass transition temperature, density and is impacted by atomic oxygen at 8 km/s. Thermomechanical properties show good agreement between experiments and simulations. Simulations the polymer during AO impact using ReaxFF provides useful insight to the degradation mechanism in terms of polymer chemistry and thermal profile.","PeriodicalId":337735,"journal":{"name":"American Society for Composites 2018","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127219191","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: 4

Closed-Form Mixed-Mode Strain Energy Release Rate Expressions for Unidirectional Laminate Configurations 单向层压板结构的封闭形式混合模应变能释放率表达式

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/ASC33/26094

Patrick Enjuto, G. Mabson

引用次数: 2