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A constitutive model for as4/peek thermoplastic composites under cyclic loading
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Rui, Yuting Sun, C. T. |
| Copyright Year | 1990 |
| Description | Based on the basic and essential features of the elastic-plastic response of the AS4/PEEK thermoplastic composite subjected to off-axis cyclic loadings, a simple rate-independent constitutive model is proposed to describe the orthotropic material behavior for cyclic loadings. A one-parameter memory surface is introduced to distinguish the virgin deformation and the subsequent deformation process and to characterize the loading range effect. Cyclic softening is characterized by the change of generalized plastic modulus. By the vanishing yield surface assumption, a yield criterion is not needed and it is not necessary to consider loading and unloading separately. The model is compared with experimental results and good agreement is obtained. |
| File Size | 878954 |
| Page Count | 38 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19900019363 |
| Archival Resource Key | ark:/13960/t3zs7nc6k |
| Language | English |
| Publisher Date | 1990-10-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Hardening Deformation Cyclic Loads Kinematics Mathematical Models Criteria Thermoplasticity Softening Peek Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
