Apple also added that the newest iPhones are built with "steel/titanium inserts" to "reinforce stress locations," and that they use "the strongest glass in the industry" in order to prevent any problems like those described.
As such, during the "stretch" phase of the transient maneuver studied here, zyxin could not account for fluidization and, if anything, would act to reinforce stress fibers.
Subsequent experiments analysing actin remodelling as a readout for Rho kinase activity in human-cultured SMCs revealed that RGS5 overexpression already reinforced stress fibre formation in these cells without further stimulation (Fig 4A, B and G).
Yet, the structure of a percolated landscape puts fundamental bounds on performance, possibly suggesting specific actions to reinforce stressed elements or to redistribute loads so to reduce the risk of bottlenecks and the impacts of failures.
In addition, a regression analysis is used to derive probabilistic estimation of the reinforcing steel stress.
The prestressed CFRP plates significantly reduced the deflection and reinforcing bar stress of the beams.
Open image in new window Fig. 7 Measured crack widths with longitudinal reinforcing bar stress for flexural beams (1 MPa = 145 psi; 1 mm = 0.03937 in).. a Average crack widths.
Based on this study, it can be concluded that through reinforcing bar stresses of 496 MPa (72 ksi), average crack widths remain below 0.43 mm (0.017 in).
The paper reviews some design philosophies that have been tried including one that uses end bearing plates to transfer reinforcing bar stresses to the surrounding concrete in beams.
Open image in new window Open image in new window Fig. 6 The extension of crack opening versus reinforcing bar stresses (1 MPa = 145.03 Psi; 1 mm = 0.03937 in).. Based on Fig. 6 for ρ ≤ 0.02, it can be concluded that through reinforcing bar stresses of 496 MPa, average crack widths (it is only possible to consider average crack widths in an analytical context) remain below 0.43 mm (0.017 in).
