Microscale viscoplastic analysis of unidirectional CFRP composites under the influence of curing process

2021 ◽  
Vol 266 ◽  
pp. 113786
Author(s):  
Xinyu Hui ◽  
Yingjie Xu ◽  
Jun Wang ◽  
Weihong Zhang
Keyword(s):  
Curing Process ◽  
Cfrp Composites

scholarly journals The Structural Performance of CFRP Composite Plates Assembled with Fiber Bragg Grating Sensors

Symmetry ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1631
Author(s):  
Hua-Ping Wang ◽  
Hao Chen ◽  
Cong Chen ◽  
Hu-Yuan Zhang ◽  
Hao Jiang ◽  
...  
Keyword(s):  
Dynamic Response ◽  
Fiber Bragg Grating ◽  
Composite Plates ◽  
Structural Performance ◽  
Curing Process ◽  
Cfrp Plate ◽  
Cfrp Composites ◽  
Cfrp Composite ◽  
In Series ◽  
Fbg Sensors

Carbon fiber reinforced polymer (CFRP) composites have been extensively used in airframes, train bodies, and engine blades for their properties of high strength, low weight, and good stability. The in-service structural performance of CFRP composites is always an important point to be investigated for its influence on structural safety. For this reason, CFRP composite plates assembled with fiber Bragg grating (FBG) sensors were developed, and the in-service structural characteristics of the CFRP plates were interpreted by FBG signals measured through time. A theoretical analysis supported by a numerical method has been provided. Experimental testing was conducted to check the proposed sensing technique for the dynamic response identification of the CFRP plate. The curing process of the bilayer CFRP plated inserted with FBGs in series was also explored. The results showed that the surface-attached FBGs in series could accurately characterize the dynamic response of the CFRP plate, and a good agreement between the numerical and testing results was observed. The strain and temperature distributions during the curing process of the bilayer plate indicated that the in-service structural performance of bilayer CFRP plates can be configured by the assembled FBG sensors. This study can support the structural health monitoring of projects by using CFRP composites.

Research of the effect of bacterial preparation "LRR" on the functional and technological parameters of meat during curing process

2018 ◽  
Vol 6 (11) ◽  
pp. 41-47
Author(s):  
Liubov Voytsekhivska ◽  
◽  
Larysa Borsolyuk ◽  
Tetiana Schelkova ◽  
Anna Gavrylenko ◽  
...  
Keyword(s):  
Curing Process ◽  
Technological Parameters ◽  
Bacterial Preparation

scholarly journals Improved Processing and Properties for Polyphenylene Oxide Modified by Diallyl Orthophthalate Prepolymer

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2016
Author(s):  
Honghua Wang ◽  
Qilin Mei ◽  
Yujie Ding ◽  
Zhixiong Huang ◽  
Minxian Shi
Keyword(s):  
Differential Scanning Calorimetry ◽  
Thermal Properties ◽  
Phase Separation ◽  
Dilution Effect ◽  
Gradual Decrease ◽  
Gel Point ◽  
Dynamic Mode ◽  
Curing Process ◽  
Scanning Calorimetry ◽  
Polyphenylene Oxide

Diallyl orthophthalate (DAOP) prepolymer was investigated as a reactive plasticizer to improve the processability of thermoplastics. The rheology of blends of DAOP prepolymer initiated by 2,3-dimethyl-2,3-diphenylbutane (DMDPB) and polyphenylene oxide (PPO) was monitored during the curing process, and their thermal properties and morphology in separated phases were also studied. Differential scanning calorimetry (DSC) results showed that the cure degree of the reactively plasticized DAOP prepolymer was reduced with increasing PPO due to the dilution effect. The increasing amount of the DAOP prepolymer led to a gradual decrease in the viscosity of the blends and the rheology behavior was consistent with the chemical gelation of DAOP prepolymer in blends. This indicated that the addition of the DAOP prepolymer effectively improved processability. The phase separation occurring during curing of the blend and the transition from the static to dynamic mode significantly influences the development of the morphology of the blend corresponding to limited evolution of the conversion around the gel point.

A dynamic DSC study of the curing process of epoxy resin

1997 ◽  
Vol 49 (1) ◽  
pp. 123-129 ◽  
Author(s):  
Susumu Tatsumiya ◽  
Katsumasa Yokokawa ◽  
Kyosuke Miki
Keyword(s):  
Epoxy Resin ◽  
Curing Process

scholarly journals Research on the Manufacturing Quality of Co-Cured Hat-Stiffened Composite Structure

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2747
Author(s):  
Xiangwen Ju ◽  
Jun Xiao ◽  
Dongli Wang ◽  
Cong Zhao ◽  
Xianfeng Wang
Keyword(s):  
Composite Structures ◽  
Sound Pressure ◽  
Integration Method ◽  
Complex Geometry ◽  
Sound Field ◽  
Thickness Measurement ◽  
Curing Process ◽  
The Finite Element Method ◽  
Manufacturing Quality

The stringer-stiffened structure is widely used due to its excellent mechanical properties. Improving the manufacturing quality of stringer-stiffened structure which have complex geometry is important to ensure the bearing capacity of aviation components. Herein, composite hat-stiffened composite structures were manufactured by different filling forms and bladders with various properties, the deformation of silicone rubber bladder in co-curing process was studied by using the finite element method. The thickness measurement at different positions of the hat-stiffened structure was performed to determine the best filling form and bladder property. Moreover, in view of the detection difficulties in R-zone of stringer, numerical simulation was performed to get the sound pressure and impulse response of at the R-zone of stringer by Rayleigh integration method, and an effective equipment which could stably detect the manufacturing quality of R-zone was designed to verify the correctness of sound field simulation and realize the detection of stringer. With the optimum filling form and bladder properties, hat-stiffened composites can be manufactured integrally with improved surface quality and geometric accuracy, based on co-curing process.

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