• Title/Summary/Keyword: Smith and Cox's theory

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The Application of Rule of Mixtures to Fiber-Reinforced Composites(3) - Determination of Constant "a" and "b" for Modified Rule of Mixtures Applied to Fiber-Reinforced, Sulfur-Based Composites - (목재 섬유 복합재(複合材)에 혼합이론(混合理論)의 적용에 관한 연구(硏究)(3) - 유황(硫黃) 화합물(化合物)을 사용한 목재(木材) 섬유(纖維) 복합재(複合材)에 수정된 혼합이론(混合理論)의 상수(常數) 결정(決定) -)

  • Lee, Byung-G.
    • Journal of the Korean Wood Science and Technology
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    • v.12 no.3
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    • pp.3-8
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    • 1984
  • It is shown that Paul and Jones' Rule of Mixtures modified by Smith and Cox's theory can be used for the fiber-reinforced, sulfur-based composites, when the constant for the linear regression equation is given. The computation results, programmed by Hewlett Packard 75C (HP 75C) using math rom pack for the linear regression form, expressed as $E_c=\frac{1}{3}aE_fV_f+bE_mV_m$, turn out to be a=3.27-3.54 b=-2.47~-2.80. This results indicate that the factors such as density of fiber mat and the amount of matrix used have nothing for affecting the numerical value of the constants a and b of the linear regression form. Conclusively this results also show that the Paul and Jones' Rule of Mixtures which has been used for the composites made by randomly-oriented long fiber can also be used for the composites made by short fiber with the same fiber orientation such as wood and lignocellulosic fibers.

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The Manufacturing of Composition Board Using Waste Sludge Discharged from Manufacturing Factory (제지공장의 폐재인 Sludge로 부터 합성 Board의 제조)

  • Lee, Byung-Guen
    • Journal of the Korean Wood Science and Technology
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    • v.15 no.2
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    • pp.99-104
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    • 1987
  • Fiber mats were made at various density levels, using fibers from papermill sludge, ricestraw and various mixtures of the two. The paper mill sludges were collected from Moorim Papermill Co, and Jeonjoo Papermill Co. They were soaked in the liquid sulfur compounds, sulfur-tall oil and sulfurpolyester compounds, and made into fiber-reinforced, sulfur-based composition board. Under optimum conditions of fiber mat preparation and saturation with molten sulfur and modified sulfur, the Young's moduls of the manufactured tiber-reinforced composition board are superior to those of conventional wood-based composition boards. For example, the moduli of elasticity of the composition board made from papermill sludge, with a density of 0.40gm/$cm^3$, were greater than 1,400,000psi as compared 800,000psi for high density hardboard(1.28gm/$cm^3$). The modulus of rupture of the best reinforced composition board manufactured was over 9000psi, comparable to 6000psi of high density hardboard. The proposed Bryant and Lee's theory, "Modified Rule of Mixtures" can be applicable to the nonoriented and short fibrous composition board, when it was modified from "Rule of Mixtures" established by Paul an Jones, and supplemented by Smith and Cox's theory, In the Bryant and Lee's theory of $E_c=\frac{1}{3}aE_fV_f+bE_mV_m$, the constants "a" and "b" for the composition boards made from papermill sludge and the mixtures of ricestraw and the sludge were identified to be in the ranges of 3.29~3.54 and -2.47~-2.80 respectively.

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Female Consumers' Attitudes and Purchase Intentions toward Intimate Apparel Brands

  • Rose, Jennifer;Cho, Eunjoo;Smith, Kathleen R.
    • Fashion, Industry and Education
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    • v.14 no.2
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    • pp.35-46
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    • 2016
  • The purpose of this study was to examine female consumers' attitudes and purchase intentions toward intimate apparel brands. To understand female consumers' shopping behaviors for intimate apparel products, this study examined interrelationships among brand familiarity, perceived risk, attitudes, and purchase intentions toward intimate apparel brands. A conceptual model was developed by adopting perceived risk theory (Cox, 1967) and theory of reasoned action (Ajzen & Fishbein, 1980). A pre-survey using a paper and pencil was conducted to identify the most familiar intimate apparel brand to young female consumers. The majority of pre-survey respondents (66 female college students) indicated Victoria's Secret as the most prominent intimate apparel brand. Therefore, Victoria's Secret was used to examine possible effects of brand familiarity on perceived risk and attitudinal and behavioral responses toward the brand. Using a web-based survey, 384 complete responses were collected from young female college students between the ages of 18-29 at a Mid-southern U.S. university. A structural equation modeling was employed to test the proposed research model and hypotheses. Results showed positive, statistically significant associations among the four variables (e.g., brand familiarity, perceived risk, attitudes, and purchase intentions). The findings suggested that young female consumers who are familiar with a particular intimate apparel brand are likely to perceive a low level of risk, leading to positive, strong attitudes with purchase intentions toward that particular intimate apparel brand. This suggests establishing brand familiarity through integrated marketing communication is crucial for risk reduction strategy in intimate apparel shopping.