三维织物剪切变形的试验研究

摘要

In order to reduce the impact of friction and yarn offset on the test results,the picture frame shear equipment is improved to guarantee the reliability and validity of the test results.The modified picture frames are employed to investigate the shear deformation 3D orthogonal fabric.The effect of the fineness of Z-yarn and fabric density on the shear deformation of 3D orthogonal fabric and the deformation mechanism are discussed.The results indicate that Z-yarn fineness and fabric density influence the shear properties of the fabric.In the initial shear stage,the friction and the torsion of Z-yarn are the main mechanism,while the lateral compression for extrusion stage.%针对摩擦力大和纱线偏移对试验结果影响明显等问题,改进和完善了相框剪切试验装置,有效地提高了试验结果的可靠性和正确性;利用该装置开展了三向正交织物剪切变形试验,分析了Z向纱细度和织物密度对三向正交织物剪切性能的影响,探索了三向正交织物的变形机理.结果表明:Z向纱细度和织物密度对三向正交织物剪切性能有一定影响;在初始剪切阶段,变形机理主要以纱线间的相互摩擦以及Z向纱线的扭转变形为主,而在挤压阶段,纱线间横向挤压变形则为主要变形模式.