广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Fiber Properties and Identification Stress-strain curves ■ Work of rupture 目 Area under load displacement curve Specific work of rupture 口 Area under stress- Specific work strain curve of Rupture 8
Fiber Properties and Identification Stress-strain curves ◼ Work of rupture Area under loaddisplacement curve. ◼ Specific work of rupture Area under stressstrain curve
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Fiber Properties and Identification 百 Elastic recovery percent ot strain being recovered when load Is released. a Occurs at the initial part of the stress-strain curve Where deformation is small and almost no relative movement of molecules d Energy absorbed can be recovered completely a Elastic recovery as cross-link Vas h-bond and ionic bond ↓ as strain or stress
Fiber Properties and Identification Elastic recovery percent of strain being recovered when load is released. Occurs at the initial part of the stress-strain curve where deformation is small and almost no relative movement of molecules. Energy absorbed can be recovered completely. Elastic recovery as cross-link as H-bond and ionic bond as strain or stress
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Fiber Properties and Identification a Resilience Work of recovery) The ratio of energy recovered to energy absorbed a May be extensional, flexural, compressional or torsional as crimp and cross-link Is a function of deformation Vas h-bond and ionic bond L as strain 囗 Resilience→ wrinkle e.g. PET VS Cotton and Rayon
Fiber Properties and Identification Resilience (Work of recovery) The ratio of energy recovered to energy absorbed May be extensional, flexural, compressional or torsional. Is a function of deformation. as crimp and cross-link as H-bond and ionic bond as strain Resilience → wrinkle ◼ e.g. PET vs Cotton and Rayon