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7 votes

is bending moment on roller supports at beams zero?

no. The change in moment is zero, as you can see on your plot. I think you can see if you imagine sectioning the beam slightly to the right of the support and constructing a free body diagram, the ...
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4 votes
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Schematic Diagrams for Mechanical Systems

The diagram most closely related to the original question seems to be a kinematic diagram. Kinematic diagrams are standardized in ISO 3952, although it seems that most often people are just copying ...
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4 votes
Accepted

What software is used for drawing dynamic & mechanical diagrams?

This is more of a long comment than an answer as i can not advice any specific software. First, if you intend to do anything professional in print or web productions than yous shouldn't be looking in ...
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3 votes

Electrical flowchart in Microsoft Visio : issues

I had to draw electrical and hydraulic schematics in Microsoft Visio at a past job. I'm glad that is behind me because that software is barely good enough for making flow charts. I would never ...
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3 votes
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Triangle symbol in pneumatic diagrams

It is a two stage actuator where the triangle represents a pilot. That means that there is a pressure assist. The direction of the arrow indicates the direction of flow.
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3 votes
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What does this P&ID symbol represent?

From Tip #16 — What is the condition of your diamonds? Example d), as I’m sure you can easily figure out, is a heater. With all other things being equal, this one shows the inward arrows adding ...
3 votes
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How to get a transfer function from this block diagram?

You are going in the right direction! Lets take these two equations: $$(1) \quad in = \alpha+a_1\alpha z^{-1}+a_2\alpha z^{-2}$$ $$(2) \quad out = b_0\alpha+b_1\alpha z^{-1}+b_2\alpha z^{-2}$$ now ...
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3 votes

How are common free body diagrams and similar illustrations made?

The images references that you have provided look like they could have been produced in LaTeX, possibly using the TikZ package. Have a look at this example http://www.texample.net/tikz/examples/free-...
2 votes

How are common free body diagrams and similar illustrations made?

CAD packages, drawing packages, you can even use shapes in software like Word & Excel, but most book diagrams were drawn by hand (until computers became common) - which explains the profession of ...
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2 votes
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Is an axial force applied at the centre of a beam considered a compressive force, tensile force, or both?

I think your big misunderstanding is in this paragraph: [...] if I were to scan, starting from the leftmost side towards the right. I would initially see a compressive force onto the beam from R, ...
  • 13k
2 votes

is bending moment on roller supports at beams zero?

Bending moment is the area under the shear diagram which is definitely increasing by a slope of 5kn/m as it gets closer to support in a straight line, so it is maximum on the support. And this moment ...
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2 votes
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ELI5: How does this water (solenoid) valve work?

A fairly clear video explaining the operation of the valve is provided by Rain Bird Irrigation™. It shows how the inlet water is providing pressure against the diaphragm, sealing the exit opening. ...
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1 vote

ELI5: How does this water (solenoid) valve work?

Usually there would be a spring to hold the valve closed. Then the solenoid would "pull" against the spring to open the valve. As for how the water flows, the water comes out of the larger ...
  • 14.5k
1 vote

is bending moment on roller supports at beams zero?

Moment in gerber joint or hinge equals zero, but moment in roller support is not necessarily zero. Moment is double integral of beam load. Reaction force in roller support causes sudden change of ...
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1 vote

Is an axial force applied at the centre of a beam considered a compressive force, tensile force, or both?

Technically a force on a structure is neither compressive nor tensile. The effect a force has on a structure or the internal reactions can be characterised as tensile or compressive. So in the ...
  • 23k
1 vote

Is an axial force applied at the centre of a beam considered a compressive force, tensile force, or both?

Conventionally, structural diagrams (V, M, T) are drawn from left to right. In the case of the axial force diagram, we need to set up/state the sign convention then draw the diagram accordingly. (Note ...
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1 vote
Accepted

How does one plot an Abbott Firestone curve

In excel what you should do to generate the curve is the following: take all the measurements for the shaft in one column (name it PROFILE) Sort the data column in ascending/descending order (doesn't ...
  • 23k
1 vote

formula for M(x) - Shear Force and Bending Moment Diagrams

Let's clear the question first: The shear and moment diagrams indicate this is a cantilever beam supported at the left end, and the system is in equilibrium under the applied loads (in green) and the ...
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1 vote

Schematic Diagrams for Mechanical Systems

Even though I can't find any standardized literature, the theory behind of what you seem to be looking for is the so called systems modelling. Peter E. Wellstead published (can be accessed here: www....
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1 vote

In a control block diagram what does a block with an angled arrow through it mean?

Given the title of the figure, I'm inferring that the slanted line means "this block adapts slowly based on the given information". The author is probably trying to convey the notion that you could ...
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1 vote

What is the engineering way to describe a factory / manufacturing plant system in a formel and mathematical way

Solar Mike is correct (as usual); the block diagram approach is the classic method for "formalizing" the dynamics inside a large and complicated system. However, it is important to realize that this ...
1 vote
Accepted

Convention for spring symbols with lateral force

The convention for an idealized spring in such a schematic is that the lateral stiffness is zero but also that it does not move out of its original orientation with respect to its base (i.e., it does ...
1 vote
Accepted

Shear force and bending diagram un-uniformly distributed load

I am a bit confused here, so I went under the assumption you have a statically undetermined beam with a fixed support (moment resisting) on the left and a roller support (non-moment resisting) on the ...
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