Applied Mechanics and Materials Vol. 251

Abstract: The response of adhesively bonded joints subjected to a transverse impact was investigated. The joints were bonded by two-part acrylic adhesive DP8005 with using two types of adherents, polypropylene and glass fiber reinforced polypropylene. The lap joints were impacted by a drop weight with hemisphere tip at a low velocity. An energy model was applied to evaluate the effect of the properties and thickness of adherents on the impact strength of the joints. The results from model showed good agreement with those from experiments.

Abstract: The polymer constitutive equations are implemented within strength of materials based micromechanics method to predict the nonlinear, strain rate dependent deformation of polymer matrix composites. Based on the constitutive polymer model developed by Goldberg, nonlinear strain rate dependent triaxial braided composite has been analyzed. To verify the formulation, the tensile deformations of a representative polymer are computed across a wide range of strain rates. Results computed using the developed constitutive equations correlate well with experimental data.

Abstract: Yarn unevenness is one of the important indexes which presents the evenness of polyester POY filament and affects the performances of the filament. The principle of capacitive evenness tester Uster and the measurement method are described in this paper. The influences of operating environment and the measuring conditions on determining the unevenness of polyester POY filament are discussed. The reasonable conditions are also pointed out, which will have the directive function for the evenness test work with Uster.

Abstract: The yarn irregularity of polyester POY in melt spinning influences not only the follow-up spinning property, but also the dyeing performance. The yarn irregularity is caused mainly by unstable state during which the filament is formed. It is presented in this paper that the main factors which affect the filament unevenness in melt spinning. They are the quality of raw materials, the improper choice and fluctuation of technological parameters, the structure of equipments and running conditions, etc. Such factors as steady spinning temperature, quenching conditions, the high performance finishes, proper collection oiling point and correct operation will guarantee lower filament unevenness.

Abstract: The purpose of this paper is to explore how the aesthetics of material is applied to car design. Based on a series of current material research with substantive examples, the paper will encourage car designers to be more experimental in their choice of materials and designs. It covers four physiologically sections including visual, tactile, auditory, and olfactory perceptions of materials. In addition, four typical case studies will showcase the present status and development trends of materials science within the automobile industry.