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Yong Bo Zhang - One of the best experts on this subject based on the ideXlab platform.
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Compressive Strength Prediction of T300/QY8911 Composite Subjected to Moisture and Temperature Environment Condition
Advanced Materials Research, 2013Co-Authors: Yong Bo ZhangAbstract:The purpose of this study is to investigate the effect of moisture and temperature on the compressive strength of T300/QY8911 composites that tend to be used as structural parts of aircrafts. In aeronautical applications, the composites are exposed to severe Environmental Conditions, and it is known that hot and humid Environments can degrade some aspects of the material performance especially the compressive strength. In this paper, an experimental study was carried out to determine the damage progressions. Scanning electron microscope (SEM) was also employed for fractographic investigations. It is observed that the failure of specimens tested in hot and wet Conditions always occurs as a result of out-of-plane microbuckling that is attributed to the reduction of matrix strength. Fiber microbuckling model, fiber kinking model and combined model were employed for the compressive strength prediction of the unidirectional T300/QY8911 composites subjected to different Environment Conditions. Results show that the combined model is more suitable for the compressive strength prediction of T300/QY8911 composite systems when suffering severe Environment Conditions.
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compressive strength prediction of t300 qy8911 composite subjected to moisture and temperature Environment Condition
Advanced Materials Research, 2013Co-Authors: Yong Bo ZhangAbstract:The purpose of this study is to investigate the effect of moisture and temperature on the compressive strength of T300/QY8911 composites that tend to be used as structural parts of aircrafts. In aeronautical applications, the composites are exposed to severe Environmental Conditions, and it is known that hot and humid Environments can degrade some aspects of the material performance especially the compressive strength. In this paper, an experimental study was carried out to determine the damage progressions. Scanning electron microscope (SEM) was also employed for fractographic investigations. It is observed that the failure of specimens tested in hot and wet Conditions always occurs as a result of out-of-plane microbuckling that is attributed to the reduction of matrix strength. Fiber microbuckling model, fiber kinking model and combined model were employed for the compressive strength prediction of the unidirectional T300/QY8911 composites subjected to different Environment Conditions. Results show that the combined model is more suitable for the compressive strength prediction of T300/QY8911 composite systems when suffering severe Environment Conditions.
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Experimental Investigation of Notched CCF300/QY8911 Composite Laminates Subjected to Tension Load
Advanced Materials Research, 2013Co-Authors: Hui Min Fu, Yong Bo Zhang, Xin Yang, Zhihua WangAbstract:An experimental study was carried out to determine the notched tension characteristics of CCF300 fiber reinforced composite subjected to the normal and hygrothermal Environment Condition. In both Conditions, the pull-out propagation was the ultimate failure mode of these specimens. The damage growth can be divided into four separate stages. In the hygrothermal Environment Condition, greater damage occurred, length of splitting increased and off axis plies were extensively pull-out from the adjacent plies.
Ma Xiaobin - One of the best experts on this subject based on the ideXlab platform.
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An Experimental Investigation into the Damage Mechanisms in Notched CCF300/QY8911 and T300/QY8911 Composites Subjected to Hygrothermal Environment Condition
Applied Composite Materials, 2013Co-Authors: Zhang Yongbo, F U Huimin, Wang Zhihua, Ma XiaobinAbstract:An experimental study was carried out to determine the notched tension characteristics of CCF300 fiber reinforced composite and T300 fiber reinforced composite subjected to normal and hygrothermal Environment Conditions. First, tests to failure with residual strength were carried out and the damage progressions were carefully investigated. Scanning electron microscope (SEM) was then employed for fractographic investigations. It was found that the CCF300/QY8911 composite specimens with poor interfacial adhesion between fiber and matrix exhibited higher residual strength, while the T300/QY8911 composite specimens with well adhesion had shorter ultimate strain. Damage progression mechanisms in the two material systems were very different. The major damage mechanism of CCF300/QY8911 composites was delamination generally occurring at lower stresses, which allowed higher levels of damage formation and resulted in higher ultimate strength. When changing to hygrothermal Environment Condition, greater damage was observed and off axis plies were extensively pulled out from the adjacent plies. On the other hand, all of the T300/QY8911 composite specimens failed due to fiber fracture with less damage, leading to a lower residual strength regardless of the Environmental Conditions. Further examinations showed that the failure mode of CCF300/QY8911 composite was much more sensitive to the hygrothermal Environment, for the micro-failure mode had changed from matrix failure and fiber breakage to fiber/matrix splitting and fiber bundle pullout.
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an experimental investigation into the damage mechanisms in notched ccf300 qy8911 and t300 qy8911 composites subjected to hygrothermal Environment Condition
Applied Composite Materials, 2013Co-Authors: Zhang Yongbo, F U Huimin, Wang Zhihua, Ma XiaobinAbstract:An experimental study was carried out to determine the notched tension characteristics of CCF300 fiber reinforced composite and T300 fiber reinforced composite subjected to normal and hygrothermal Environment Conditions. First, tests to failure with residual strength were carried out and the damage progressions were carefully investigated. Scanning electron microscope (SEM) was then employed for fractographic investigations. It was found that the CCF300/QY8911 composite specimens with poor interfacial adhesion between fiber and matrix exhibited higher residual strength, while the T300/QY8911 composite specimens with well adhesion had shorter ultimate strain. Damage progression mechanisms in the two material systems were very different. The major damage mechanism of CCF300/QY8911 composites was delamination generally occurring at lower stresses, which allowed higher levels of damage formation and resulted in higher ultimate strength. When changing to hygrothermal Environment Condition, greater damage was observed and off axis plies were extensively pulled out from the adjacent plies. On the other hand, all of the T300/QY8911 composite specimens failed due to fiber fracture with less damage, leading to a lower residual strength regardless of the Environmental Conditions. Further examinations showed that the failure mode of CCF300/QY8911 composite was much more sensitive to the hygrothermal Environment, for the micro-failure mode had changed from matrix failure and fiber breakage to fiber/matrix splitting and fiber bundle pullout.
Tore Markeset - One of the best experts on this subject based on the ideXlab platform.
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A methodology for throughput capacity analysis of a production facility considering Environment Condition
Reliability Engineering & System Safety, 2011Co-Authors: Abbas Barabadi, Javad Barabady, Tore MarkesetAbstract:Throughput capacity of a production facility plays an important role in supporting managers and engineers in the decision making processes related to the design and optimization of a production plant. System throughput capacity is affected in complex ways by the reliability, maintainability, and capacity of its components. These in turn are considerably affected by operational Environment such as ambient temperature, icing, dust, wind, etc. Therefore, in order to have an effective throughput capacity analysis (TCA), all influence factors (covariates) on these terms need to be identified; furthermore, their effect must be modeled and quantified by an appropriate statistical approach. The aim of this paper is to develop a methodology for throughput capacity analysis considering Environment Condition. A simple case study is used to demonstrate how the methodology can be applied in a real case.
Li Xiao - One of the best experts on this subject based on the ideXlab platform.
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GEOGRAPHICAL Environment Condition ON THE OUTGOING RURAL WORKERS' BEHAVIOR
Economic Geography, 2009Co-Authors: Li XiaoAbstract:This paper analyzed inquiry data that based on the indoor investigation of 1 000 farmers in Henan province. The different geographical Environment Conditions, such as terrain, traffic, production type of agriculture and development level of economic are concerned with the outgoing rural workers’ behavior. A behavior model is built based on the four geographical Environment Conditions. The analysis result indicates that physical geographical Environment has a notable effect on the behavior of outgoing rural workers. There are remarkable relativity between the economic Environment and the outgoing rural workers’ behavior. Different geographical Condition has a diverse affection on the outgoing rural workers’ behavior, which submits to the sequence, economic level, terrain Condition, traffic Condition and the types of agriculture production.
Huang Xianfang - One of the best experts on this subject based on the ideXlab platform.
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Application of Spaceborne SAR Data to Uranium Metallogenic Environment, Condition and Prognosis(In Chinese)
China Nuclear Science and Technology Report, 2000Co-Authors: Huang XianfangAbstract:JERS-1 SAR data processing and data fusion with TM, airborne radioactive and magnetic survey data have been elaborated and image effects have been described in the paper. By means of the analysis of the processed images, the stratigraphy, structures (including faults and folds) and ore-controlling factors in the study area have successfully been interpreted; the underground water mobile characteristics have been discussed; and the metallogenic Environment and Condition have been summarized. Based on above research results, the prospecting criteria have been provided and favorable sections have been suggested. The practice has indicated that the application of spaceborne SAR data to uranium reconnaissance and exploration has potential prospects.