Bridge failures underscore the importance of rigorous material testing. The collapse of the incomplete pedestrian bridge at Florida International University on March 2018 is an example where design errors led to growing cracks as described by OSHA.
Although material failure is not the sole reason for bridge failures, it is a crucial step for selecting the right materials, bridge design analysis, and construction testing.
G'day all
Having a metal element with a notch like crack (assume sharp one, exhibits plasticity), what are the actual fracture mechanism (the phases the crack goes through) in the total fatigue-life.
please comment on these scenarios:
1- crack initiation life calculated from the (S-N, e-N), then using LEFM/EPFM to determine the cycles for the crack propagation to failure...
Q/ how to find the crack length between the two phases, I mean from which stresses and at which crack length we start the crack propagation life estimation.
The PIMM lab is looking for a postdoctoral researcher to work in a joint project with CNES (French space agency), on the design of architectured materials through additive manufacturing.
Recrystallization is one of the most important physical phenomena in condensed matter that has been utilized for materials processing for thousands of years in human history. It is generally believed that recrystallization is thermally activated and a minimum temperature must be achieved for the necessary atomic mechanisms to occur. Here, using atomistic simulations, we report a new mechanism of dynamic recrystallization that can operate at temperature as low as T = 10 K in metals during deformation.
Lead Scientist, Aluminum Sheet Product Metallurgy
Novelis is the world leader in rolled aluminum products, delivering unique solutions for the most demanding global applications, such as automotive vehicles, beverage cans and bottles, architecture, and consumer electronics. We are also the largest recycler of aluminum in the world. Novelis is globally positioned, operating 25 manufacturing facilities in 9 countries on four continents, with nearly 11,200 employees. The company reported revenue of approximately $10 billion in the fiscal year ended March 31, 2014.
A colleague of mine wants to find a visiting position on research of fracture mechanics of metals. His visit is supported by a grant from his institution and he is interested in working with someone on fracture mechanics of metal materials. Please drop me a line and I shall help you connected.
Dear all,
I would like to run a tensile test under ls-dyna of a mild steel and
apply a 7000 N load to the dog bone specimen on a explicite scheme.
Unfortunately, I
have wild deformations ( and an error) on the nodes on edges where the
load is applied, so can you please tell me what are the importants
constants (like time termination, mass scale,...) and how to perform a
perfect run?
Have a good day,
Thank you
M.
Hi,
I am searching on multiscale simulation of polymer/metal ( mechanical propertices).
Cohesive zone model is used for this porpose.
Is there another models that can use for this issue and using MD data as input?
Best regards,
Hamed
