| The in-depth contents |
| Publication year |
1997 |
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| Title |
A METHOD FOR MEASUREMENT OF STRESS-STRAIN CURVES FOR ELASTIC ANALYSIS ON MEMBRANE ON THE STATE AFTER STRESS RELAXATION OR CREEP |
| Author |
Hirokazu Minami,Chiaki Yamamoto,Sinya Segawa,Yoshihiro Kono
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| Summary |
Membrane materials (e.g. PTFE coated glass fiber fabrics) generally show nonlinear visco-elastisity. It will be useful to estimate the stresses or strains of the fabrics which are on the state after stress relaxation or creep，by means of elastic stress analysis. This，however， requires specific stress-strain relationship measurements. The authors presented a practical method for such measurement in this paper. The measurements are based on multi-step bi-axial stress relaxation and creep testing. Firstly，theoretical considerations are demonstrated using multi-step linear visco-elastisity assumptions. Then，a practical method for the measurements which provide approximate stress-strain relationships for the elastic stress analysis are proposed.
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