2 results about "Low stress" patented technology

The invention discloses a fiber composite material interface performance rapid evaluation method based on a high-stress fatigue loss mode, and the method comprises the steps: constructing a fatigue loss characteristic system database of a fiber reinforced composite material standard sample, and the standard sample system database comprises a low-stress long-term fatigue performance database and a high-stress short-term fatigue performance database; the low-stress long-term fatigue performance database comprises the step of obtaining the fatigue life corresponding to the fiber reinforced composite material under the standard parameters through a low-stress long-term fatigue performance test; the high-stress short-term fatigue performance database comprises a fatigue damage morphology and a tensile property decay rate corresponding to the fiber reinforced composite material under standard parameters obtained through a high-stress short-term fatigue performance test; forming a multi-modal characteristic-fatigue life mapping database according to the fatigue life, the fatigue damage morphology and the tensile property decay rate of the fiber reinforced composite material under the standard parameters; and testing the to-be-tested sample according to a similarity principle, sorting interface performance, and predicting the long-term fatigue life of the to-be-tested sample.