Time-variant reliability design method for rectangular plate structure with initial defects
A design method, rectangular plate technology, applied in computing, special data processing applications, instruments, etc., can solve problems such as large safety redundancy, inability to strictly meet requirements, loss, etc.
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[0114] In order to understand more fully the characteristics of the invention and its applicability to engineering practice, the present invention aims at such as figure 2 The proposed rectangular plate structure with initial defects 20Cr2Ni4A material is optimally designed based on time-varying reliability. The two ends of the rectangular plate structure are subjected to eccentric alternating tensile load P, and the explicit expression of the stress range △σ can be solved by considering the geometric dimensions, initial crack conditions and loading conditions, as follows: Here, the calculation of △σ can be equivalent to the normal stress under tension along the central axis and the maximum normal stress under pure bending superposition (see image 3 ). Based on the classic Paris formula, the crack growth rate can be further calculated an explicit expression for Table 1 gives the uncertainty information of the rectangular plate structure in the examples.
[0115] T...
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