American Society for Composites 2018最新文献_第7页

Full-Field Strain Patterns of Sandwich Beams of Different Length under Three-Point Bending 三点弯曲作用下不同长度夹层梁的全场应变图

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/ASC33/26108

F. Chiang, Lingtao Mao, Rui Guo, Austin Giordano

引用次数: 0

Optimum Design of Lay-Up Configuration and Ply Drop-Off Placement for Tapered Composite Laminate 锥形复合材料层压板铺层结构及铺层落点的优化设计

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/ASC33/26033

S. Honda, Kosuke Takahashi, T. Higuchi, Ryotaro Takeuchi

{"title":"Optimum Design of Lay-Up Configuration and Ply Drop-Off Placement for Tapered Composite Laminate","authors":"S. Honda, Kosuke Takahashi, T. Higuchi, Ryotaro Takeuchi","doi":"10.12783/ASC33/26033","DOIUrl":"https://doi.org/10.12783/ASC33/26033","url":null,"abstract":"The present study optimizes lay-up configurations and drop-off placements to maximize the failure strength of tapered laminates. A lookup table of stress components for calculation of Christensen’s criteria is prepared in advance for all possible combinations of 3-ply laminates which is the minimum structure of ply dropoff. Stress components at three corners of resin pockets modeled triangular are first obtained from the finite element analysis (FEA). Then, the optimization is conducted for the laminate which tapers from 16- to 8-ply by using a simple genetic algorithm method. Objective functions are evaluated by referring only stress indexes listed in the lookup table and the FEA are not performed during the optimization. Both thick and thin sections are limited to quasi-isotropic laminates with 45° increment angle, but a stacking sequence of plies is variable and optimized. Placement of ply drop-off are also design variables. It was revealed that 0° and 90° plies are dropped near the thick and thin sections for the optimum result. Experimental results validated that the optimum structure has higher failure strength than the reference one.","PeriodicalId":337735,"journal":{"name":"American Society for Composites 2018","volume":"6 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":"115450733","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 Mode Transition in Transverse Tensile of UD-CFRP Under Various Temperatures and Strain rates 不同温度和应变速率下UD-CFRP横向拉伸失效模式转变

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/ASC33/26165

Mio Sato, Sakie Shirai, J. Koyanagi, Y. Ishida

引用次数: 0

Buckling Stability of Additively Manufactured Isogrid 增材制造等网格的屈曲稳定性

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/ASC33/26164

S. Ananth, T. Whitney, E. Toubia

引用次数: 1

Techno-Economic Model and Simulation for Wind Blade Manufacturing 风电叶片制造技术经济模型与仿真

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/asc33/26009

S. Johnson, M. Polcari, J. Sherwood

{"title":"Techno-Economic Model and Simulation for Wind Blade Manufacturing","authors":"S. Johnson, M. Polcari, J. Sherwood","doi":"10.12783/asc33/26009","DOIUrl":"https://doi.org/10.12783/asc33/26009","url":null,"abstract":"The ongoing demand to reduce the LCOE (Levelized Cost of Electricity) drives the wind industry to explore new technologies that will advance the state-of-the-art for composite wind blade manufacturing. These new technologies span the range from new resins and fibers, to improved blade designs, to innovative manufacturing techniques. However, since the introduction and widespread adoption of vacuumassisted resin-infusion techniques for blade making, there has been no significant change in the basic labor-intensive manufacturing process for wind blade production. In the current research, a Techno-Economic Model (TEM) and a complementary simulation of a generic wind blade manufacturing facility are developed. The TEM is sufficiently robust to take into account the very rapid product refresh cycle (and concurrent consumption of capital), differences in blade lengths, and the potential future composite technologies such as carbon fiber and thermoplastics that could impact the blade design and resulting manufacturing processes. To investigate the long-term costs and benefits, the TEM also takes into account the cash flows over a multi-year period so that the true value of improvements can be identified and used to justify capital investment in automation and other process changes. The complimentary simulation is built in DELMIA. DELMIA allows for a visual tool to evaluate how changes in the manufacturing steps will impact process flow and timing. The integration of these two models into a full Techno-Economic Analysis (TEA) provides a comprehensive tool to identify opportunities for increasing throughput and for exploring the impact of capital investments.","PeriodicalId":337735,"journal":{"name":"American Society for Composites 2018","volume":"26 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":"122716492","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: 1

Numerical and Experimental Assessment of a Modified Transverse Cut Tension (TCT) Specimen for In-Situ Loaded X-Ray Computed Tomography of Mode II Dominated Composite Damage Progression 一种改进的横切张力(TCT)试样用于II型主导复合材料损伤进展的原位加载x射线计算机断层扫描的数值和实验评估

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/ASC33/26024

A. Harman, D. Mollenhauer, P. Chang, P. Frezza, John Wang, W. Seneviratne

{"title":"Numerical and Experimental Assessment of a Modified Transverse Cut Tension (TCT) Specimen for In-Situ Loaded X-Ray Computed Tomography of Mode II Dominated Composite Damage Progression","authors":"A. Harman, D. Mollenhauer, P. Chang, P. Frezza, John Wang, W. Seneviratne","doi":"10.12783/ASC33/26024","DOIUrl":"https://doi.org/10.12783/ASC33/26024","url":null,"abstract":"The principal means by which delamination may progress in appropriately designed composite aerospace structures is via Mode II fracture. This can arise near bolted and bonded joints, following in-service damage such as impact or following the inclusion of integrated electronics into the composite structure and manufacture-induced defects. A new specimen type based on the Transverse Cut Tension (TCT) test is proposed to allow the use of in-situ X-ray micro-computed tomography for observation of mode II fracture processes. The tomography seeks to non-destructively observe the progression of three dimensional crack front features that cannot be seen in typical aerospace composite tests. The paper comprises an account of the design using analytic and finite element methods and preliminary experimental verification. The results showed that the measured toughness of the miniaturized specimen compared well with published results for this material in the literature. In addition, a small period of stable fracture growth was found that would permit in-situ X-ray micro-tomography of progressing Mode II cracks. The work provides the means to observe three-dimensional Mode II crack fronts, potentially in the presence of friction effects, which will contribute to establishing a firmer basis for improved physics-based simulation development.","PeriodicalId":337735,"journal":{"name":"American Society for Composites 2018","volume":"1 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":"129964675","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: 3

Tensile and Compressive Failure Behaviors of Triaxially Braided Composite 三轴编织复合材料的拉压破坏行为

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/asc33/26151

Zhenqiang Zhao, Chao Zhang, Yulong Li

引用次数: 2

Draping Behavior of Non-Crimp Fabrics 无卷曲织物的悬垂性能

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/ASC33/25976

W. Rodgers, Praveen Pasupuleti, Selina Zhao, A. Dereims, M. Doroudian, V. Aitharaju

引用次数: 0

Computationally Efficient Damage and Residual Strength Predictions using Progressive Damage Failure Analysis (PDFA) with an Enriched Shell Element 基于渐进式损伤失效分析(PDFA)的富壳单元损伤和残余强度预测

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/ASC33/25908

T. Goode, Mark McElroy, Nathan Sesar, M. Pankow

引用次数: 0

Investigation of Mode I Crack Growth of VARTM Carbon Composites Using Optical Fibers 基于光纤的VARTM碳复合材料I型裂纹扩展研究

American Society for Composites 2018 Pub Date : 2018-11-07 DOI: 10.12783/asc33/26128

D. A. Drake, R. Sullivan, K. Brown, S. Clay

引用次数: 2