Hi,
I am hoping someone can help me with the following problem:
I have 3 metals in contact: An OS212 Steel bracket (Passivated+painted) connected via titanium rivets(Anodized) to an Al2024-T351-HDT Sheet (Anodized+painted). Although all three components have some form of corrosion protection...
Hi,
I have read most of the posts here relating to wind loading on structures, but have not read the specs from different countries-so please don't be upset if this is clear in other codes. In South Africa, the wind load code is called SANS 10161-3. For calculating the basic wind speed, the...
Hi,
I am investigating the overhang beam pressure distribution when part of the beam is resting on an elastic foundation. We are all aware of the assumption that when a moment is reacted at the foundation, the reacting end beds-into the foundation and creates a triangular pressure distribution...
Hi.
I would like to derive the classic Bernoulli/Newton elastica curve from first principles.
Bernoulli's/Newton's classic elastica equation is of the form:
1) curvature = dθ/ds
The RHS reforms to the well known elastica equation:
2) dy2/d2x/(1+(dy/dx)2)3/2
But how do I get from 1) to...
Hi,
The following is the differential equation for a beam on a varying-stiffness elastic foundation. Essentially the beam sits on a cantilever, whose stiffness varies to the third power with length. Does anybody know how to solve such an equation as a closed form solution (if possible)...
Hi,
The following is the differential equation for a beam on a varying-stiffness elastic foundation. Does anybody know how to solve such an equation as a closed form solution (if possible)?
E*I*y(x)''''+k*y(x)/x^3=0
where k is a constant.
thread2-192705
As an addendum to the above thread, if I have three shell elements of varying thickness connected with springs in an FE model, not working in double shear (the load is applied at the top shell), do I apply the Huth stiffness for each connection or do I use an average for both springs?
When calculating the tension allowable on an extruded angle clip and for Ultimate conditions I often use the Lockheed graphs and the Niu angle bathtub fittings where applicable. However these are all for Ultimate conditions (test data) and give much more allowable tension load than just...
Hi, I have a question:
When there is a stress concentration around a hole in an aircraft panel, I use the neuber equation to predict the plastic stresses at the hole, and compare that stress to Ftu of the material. However, the neuber relation can factor down very large stress concentration...
Hi,
I have been using Engineering Equation Solver for my dissertation, but the academic version supplied by my University always seems to be expired. Can anybody help me find a site I can download the academic version from?
Secondly, does anybody know what the typical isentropic efficiency of...
This may be more for the aeronautical structural guys, but where can I find information related to the buckling analysis of flat rectangular metallic panels WITH A CIRCULAR HOLE in combination of shear and compression or one of the two. ESDU doesn't seem to have any info on this.
Thanks
This may be more for the aeronautical structural guys, but where can I find information related to the buckling analysis of flat rectangular metallic panels WITH A CIRCULAR HOLE in combination of shear and compression or one of the two. ESDU doesn't seem to have any info on this.
Thanks
I am searching for the fatigue stress intensity factor for rolled threads vs. its equivalent cut thread K_f value, specifically for a 7/16" threaded bolt. What are the parameters that would drive predicitng these values? Can anyone help me out?
