广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Chapter 8 Fiber Properties and ldentification
Chapter 8 Fiber Properties and Identification
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Fiber Properties and Identification a Mechanical properties ■ Tensile properties 口 Tensile deformation △l
Fiber Properties and Identification Mechanical properties ◼ Tensile properties Tensile deformation l 0 l f l
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Fiber Properties and Identification a Tensile deformation: some concepts ■ Elongation A=1r- Strain △l 0 0
Fiber Properties and Identification Tensile deformation: some concepts ◼ Elongation 0 l l l = f − – Strain
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Fiber Properties and Identification □ Tensile deformation ■Load a Force applied to extend the fiber a Unfair to compare force applied to fibers with different sizes Stress Unit: Pa= N/m2 -Engineering stress F or dyne/cm2 G psi=pound/in 2
Fiber Properties and Identification Tensile deformation ◼ Load: Force applied to extend the fiber Unfair to compare force applied to fibers with different sizes. – Stress –Engineering stress Unit: Pa = N/m2 or dyne/cm2 psi = pound/in2
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Fiber Properties and Identification □ Tensile deformation For textile yarns and fibers, hard to determine cross-section area use linear density gf/denier or N/tex
Fiber Properties and Identification Tensile deformation ◼ For textile yarns and fibers, hard to determine cross-section area use linear density: gf/denier or N/tex