In the initial setting of the concrete when the shrinkage deformation initiates, energy is released in the damaged area around each micro crack
(according to the energy theorem).
During the production process of bolt, the micro crack
occurred at the bottom of the bolt or the head rod connection.
This agglomeration caused the composites had low mechanical properties while cracking propagation easy to occurs and initiated to the presence of micro crack
. Similar trend was observed in composite containing smaller size of dolomite, 63 [micro]m at where the agglomeration has occurred after 50% filler loading.
During the calcined process, multiples micro crack
are generated, and the form became permeable.
With this crystal the disk crystals block the propagation of a micro crack
in the cemented carbide; the crack must go around the crystals or propagate through the crystals with high resistance.
In our studies, the optical system found a 0.02 mm micro crack
on a Pb-free [mu]BGA that went undetected by x-ray (Figure 22).
A micro crack
was initiated at the origin near the tensile surface and propagated in TG and then IG manner.
The conventional method involving un-controlled blasting is causing severe damage to dimension stone reserves in terms of high losses, production of micro cracks
, macro cracks and substandard blocks due to which It is estimated that there is more than 85 percent of waste produced in extraction phase of marble and granite which is more than 45 percent as per international standard (Muhammad Omair, 2014; Shaker Mahmood, 2011).
Therefore, the loss caused by any damage, even micro cracks
, in each individual cell was multiplied through the system.
Under incremental applied load, micro cracks
grow and then join to create macro-cracks (Yao, Li, and Wu 2003; Yoo et al.
TEHRAN (FNA)- The latest ultrasonic inspections detected a substantial number of new micro cracks
in nuclear reactors at the Tihange and Doel power plants in Belgium since the last study conducted three years ago, Belgian and German media report.