Advanced Materials Research Vols. 332-334

Abstract: A low cost, high reliability pendulum impact device is designed and set up with a gas generator and inflator, and a real deploy test is conducted with 45L drive airbags made of Nylon 66. The interaction between the dummy pendulum and the airbag in this simulation is recorded to observe and study the impact and injury to human body. The HIC is calculated and taken as an important basis for the evaluation of airbag performance. This test can also be used on the study and optimization of airbag fabrics.

Abstract: Recognize Fabric Detects based on support vector machine is established for examining and classifying a variety of fabric Detects by machine. By dimensional histogram statistic method we get parameters and then put the parameters in training example set to get support vectors. The results show this method is feasible and effective.

Abstract: Distinguishing of wool and cashmere is one of the toughest problems in fiber identification area. Support Vector Machine (SVM) was advanced here to classify fibers, and Genetic Algorithm (GA) was used to optimize multi-parameters of SVM simultaneously. Experimental results show that it plays full part of the GA, and accelerates the optimization search of SVM parameters. The model established is of practical significance in identification of wool and cashmere.

Abstract: Accelerated thermal-oxidative aging tests on Nylon 66 automotive airbag material are designed and performed in this paper. After the environmental profile of airbag was analyzed, Nylon 66 airbag yarns were reasonably selected as the test samples, and its tensile strength was chosen as the significant character of their aging stability. By heat aging、humidity aging、cycle ageing and comprehensive process aging experiments, 350dtex Nylon 66 filament were sampled and the tensile strength loss of samples was measured, to determine the mechanisms and factors that influence aging stability of the Nylon 66 airbag materials. The experiment results show that Nylon 66 has excellent aging stability, and that water molecules can accelerate its degradation. The experiment data can be used to predict the airbag lifetime in a benign store environment, and as references in selecting airbag materials.

Abstract: To evaluate the mechanical properties of natural fiber fabrics with the characteristic of interweaving between warp and weft direction as well as textile structural composites under complex stress state, it is essential to develop experimental techniques to realize multi-axial testing for large deformation. This work proposes a novel testing device for investigating fiber fabrics and textile composites under multidimensional loads. Accuracy of the system is comparable to the testing diagnostics of the Instron 5808 previously. The homogeneity for different types of cruciforms and different biaxial tensile speeds were investigated. The effects of different loading methods, biaxial (X and Y), and 3-D loading (X, Y, and Z) on the breaking strength of the woven ramie fabric were presented. The displacement-field and shear field for composites with hole were characterized by the digital speckle correlation method.

Abstract: Based on traditional wrinkle recovery evaluation, this paper proposes sculpting degrees and memory degree indices as ways of testing PTT fabrics. According to the market, we developed 8 sample fabrics and evaluated their plasticity. Results show that: wrinkle recovery, sculpting degrees and memory degree indices can be used to evaluate the plasticity of fabrics, and they are consistent with each other, sculpting degrees and memory degree indices can directly reflect the difference in the plasticity and recovery of PTT fabrics, they contribute to the comprehensive evaluation of the plasticity of PTT fabrics.

Abstract: A dynamic method was investigated to measure thermal and humidity properties of cotton fabrics. In order to simulate ambient air condition, testing sample was rotated during measuring process, and surface temperature and humidity on fabrics in various simulated wind speeds (rotation speeds) and different moisture regains was studied. As a result, in the process of moisture vapor releasing under dynamic ambient environment, a corresponding curve of the surface humidity increased in first stage, then keep an almost constant humidity values, and decreased at last, on the contrary, related curve of surface temperature decreased at the beginning, then held a stationary temperature value in the second phases, and finally increased as time passed. The faster speed of ambient simulated air current (rotation speed), the more time related surface temperature and humidity last.

Abstract: In this study, the biodegradable composite fiber contained different ratios of the compound antihypertensive drugs were electrospun.The morphology, chemical components, heat stability of the composite fibers were investigated.The results showed the diameters of the composite fibers decreased and their distributions tended to be much evener with the increase of the compound antihypertensive drugs content. Fourier Transform Infrared (FT-IR) showed the chemical components of the compound antihypertensive drugs had not changed when it was electrospun into the composite fibers. DSC results showed that the drugs lost their intrinsic crystallization and existed in amorphous state in the composite fibers and the heat stability of the composite were better than the pure drug.

Abstract: Although installation art and fiber art are two different modern art categories, as they are both based on sculpt of materials instead of portray, they are usually connected together. With consideration on design, existence form and material concept of installation art, this paper discusses the expansion and performance of these methods in fiber art creation.

Abstract: For the demands of thermal infrared (TIR) radiation change regularity for TIR radiation detection experiments of interaction between bolt and rock, TIR image information extracting and quantitative analysis of bolts action zones were carried out. The IR isothermal fringes of the bolted bocks were obtained through thermal infrared image subtraction of bolted bocks and data fitting. The interaction ranges between bolts and rock were obtained and the bolted ranges of lateral directions were determined. The quantitative treatment methods were applied to analyze infrared images of bolted roadway also. The common acting zones of several bolts in the surrounding rocks are determined. The theoretical guides have been provided for the bolt supporting parameters design of spacing interval and array pitch.