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Questions tagged [shear]

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Can Someone Please help me in this Simplifying Load Diagrams problem

Hi Please help me answer my homework about simplifying load diagrams quickly, Thanks. I don't know how to simplify the left-hand side but on the Right-hand side I'm guessing I have to move that 5 ft/...
Barry Allen's user avatar
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9 views

Index notation for the generalized form of the velocity field dependance on shear and rotation

Good day guys, I was studying fluid dynamics and came across the following equations (shown in the image): When we have both shear and and rotation, they each contribute to the change in velocity ...
RMS's user avatar
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Characteristic scales in Thin Shear Layers Equations (Aerodynamics)

I am struggling to understand what characteristic scales mean in the context of thin shear layer equations. I am referring mostly to the following paragraph from the book "Turbulent Shear Layers ...
Bogdan's user avatar
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Analyzing shear stress of plate

I would like to conduct a nonlinear analysis to obtain the stress-strain curve of a plate subjected to shear force, as depicted in the figure below. However, I am encountering difficulties in setting ...
moong's user avatar
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1 answer
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Combined shear stress due to shear force and torsion

Let's assume I have a rotating shaft supported with bearings at both ends. This shaft is exposed to a point load (by means of another bearing) at some point and a torque. I want to calculate shear ...
Enes's user avatar
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1 answer
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What is the shear force at point B? Is it +P or -P or zero? I am not able to find any source that gives the right information

I am not able to understand here that what should be the value of Shear force at point B. It seems to be a discontinous point, as there is point load there, but can we say about the exact value of ...
Suryakant Thakur's user avatar
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1 answer
49 views

Shear Wall placement -- reflectionally symmetric or rotationally symmetric?

Is it better to add a shear wall that is reflectionally symmetric or rotationally symmetric? I'm designing a confined masonry structure in a seismic zone. My understanding is that the shear walls are ...
Michael Altfield's user avatar
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1 answer
31 views

Applying simple shear to two plates

I read that the application of shear requires that equal and opposite forces are applied to two parallel plates. Why is this the case? If the force on one plate is transmitted through the material to ...
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Tensile Strength of Shear Strength for a fully supported member

I have an extrusion that is fully supported and will bear a wheel load. Considering its fully supported, should I utilize the shear flow equation to assess it against factors such as tensile strength ...
see_general_notes's user avatar
1 vote
1 answer
82 views

Tension and Shear on L-Bracket Offset From Wall

I’m planning to mount a mantle on a brick fireplace wall using two iron L-brackets that are 5” wide and 1/4” thick. Each bracket has four 5/16” mounting holes…two at the top and two at the bottom. The ...
jdchess's user avatar
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How do I calculate magnitude of shear force per unit of length when all I'm given is the diameter?

I had a chemical engineering homework problem where I had to come up with a velocity profile for methanol flowing through a cylindrical tube, where viscosity and average velocity were given, but the ...
Gregory's user avatar
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Calculating Admissible Shear stress with a uniformly distributed load and a point load

I have the following equation for calculating the Admissible shear stress for a uniformly distributed load. $$\tau_{adm} = \frac{3}{2}\cdot \frac{F\cdot L}{2b\cdot h}$$ where $F$ = kN/m $L$ = ...
Rob Holmes's user avatar
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FEA of Rectangular Body Under the Effects of Combined Rotational and Translational Shear

First image is model setup. Clasp is rigidly constrained at top surface. Rectangular beam is affixed to clasp at clasp faces (locally constrained), by way of adhesive pads (second and third images). ...
C_Nyuli's user avatar
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1 answer
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Theoretically when a homogeneous isotropic bar is subjected to axial loading, does it fail in shear?

I m referrencing James M Gere, Timoshenko Mechanics of Materials Chapter 2 Page 106. The book talks about effect of uniaxial load on a small element that is inclined in one axis. So my question is if ...
Aanamol Shrestha's user avatar
1 vote
1 answer
825 views

Maximum tensile and shear loads on screw

I'm using a screw in an application where I want to have a high degree of confidence the screw will not fail, and I want to be sure I'm calculating the maximum tensile and shear loads it can sustain ...
MattHusz's user avatar
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1 answer
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How can I anchor a rubber sheet that will be stretched?

I am designing a cylindrical container that will be filled with water. One end of the container will be solid with flow port and the other end will be a 3mm rubber sheet. I want to oscillate the ...
akz9's user avatar
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2 answers
415 views

Correct beam theory for calculating radial force in bearing due to a bending moment in beam?

I am designing a cylindrical shaft that has a round disc at its top. I am hoping to seat this shaft in 2 radial bearings and couple to a motor. The image below gives an overview of the loading diagram....
chrisj00's user avatar
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1 answer
35 views

Compliant mechanism that can resist shear force

Looking for a compliant mechanism that can witsdent sheat force but still move in another axis Is there such compliant mechanism that can resist shear force but still bend like a hinge? Is it even ...
Simon's user avatar
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2 answers
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Calculating the required dimensions of horizontally-oriented weight-bearing beams

In the image is a design for a chemical etched piece of metal. Shown in white are holes formed in a sheet of metal, which is shown in grey. Highlighted in the red circle is one of four sections that ...
EddieP's user avatar
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2 votes
1 answer
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What is the force required to puncture through a sheet of foil against an anvil?

A hardened steel contour with a sharp edge presses against plastic foil which lies on top of a hardened steel anvil plate. What would be the force required to punch through the foil? I am familiar ...
jessegerritsen's user avatar
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precast construction, shear force and home gym

I have home gym machine (see below). I am in building constructed with precast construction (https://en.wikipedia.org/wiki/Precast_concrete). Builder has refused me to assemble the equipment because ...
user1578026's user avatar
1 vote
2 answers
256 views

How to improve the shear strength of a steel rod?

How can the shear strength of a steel rod be improved? The application I am thinking of is rods used to make bolts where we want the bolt to resist being sheared off after it is attached. Some of the ...
Wallace Park's user avatar
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1 answer
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Justification of static equilibrium for a cut structure/frame

Axial deformations are ignored. This structure is under the specified force: Is the internal shear force in column BC equal to that of column DE? If we cut the structure at middle of BC and DE ...
Megidd's user avatar
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2 answers
180 views

Magnitude of shear stress on beam element

In a previous question, the existence of a horizontal shear stress in a cantilevered I-beam with one free end was resolved. Here I'd like to explore the magnitude of the shear stress. Consider an I-...
Karlton's user avatar
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2 answers
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Direction of shear in beam cross section - how to understand the convention

In an I-beam, the shear flow is usually shown drawn as on the left, not as drawn on the right. I do not understand why. I do understand: The total horizontal shear force must be zero, consistent with ...
Karlton's user avatar
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1 vote
3 answers
698 views

How to use Mohr's circle to find stresses on a slanted plane?

Here is my attempt to the problem: Does this make sense? rotation clockwise 60* from horizontal to normal of the slanted plane , therefore $2 \times 60$ clockwise as well on Mohr's circle. I am ...
CountDOOKU's user avatar
1 vote
2 answers
109 views

How to find the shear stress just below or just above some elevation?

Say the cross section carries a vertical shearing force of 40 kN. And say I want to find the value of the shear stress just below the section a-a. I am very confused about which area $(A)$ to take ...
CountDOOKU's user avatar
1 vote
3 answers
785 views

What does negative shear stress mean $\tau \:=\:\frac{VQ}{It\:}$?

$\tau \:=\:\frac{VQ}{It\:}$ My confusion lies within $Q$ term. $Q = yA$ where $A$ is the cross-sectional area of the segment that is connected to the beam at the juncture where the shear flow is ...
CountDOOKU's user avatar
1 vote
1 answer
31 views

should the hachures in moment and shear diagram be vertical?

when we plot the shear or moment diagram we add hachures to the area created with these diagrams , in most cases we see vertical hachures, is it represent the internal forces? or its just used to ...
Samir Benabdelaziz's user avatar
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1 answer
649 views

Relationship between shear moduli in an orthotropic material

I'm confused what the relationship between each of the shear moduli are in an orthotropic material. From what I understand, there are 3 independant major shear moduli, G12, G13, and G23. They each ...
TwoWaySpeedOfLight's user avatar
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3 answers
2k views

M16 Bolted connection. Shear strength or static load carrying capacity

Can anyone please advise in quick numbers the load carrying capacity of a bolted connection? There are 2 vertical I columns with a horizontal I beam attached using 6 x M16 bolts at each end...somewhat ...
user36808's user avatar
0 votes
4 answers
312 views

How do you simplify this load diagram?

Very rough sketch but I'm having trouble with a Shear and Bending Moment problem, and I'm pretty new to the topic. This is the original diagram: I already simplified the left side (not sure if it's ...
dumbusagi's user avatar
1 vote
1 answer
616 views

Maximum shear in a beam

Engineering books and lectures typically make two things clear: Maximum bending stresses (normal) develop at the beam surfaces, that is, at the greatest distance from the neutral axis. Shear stresses ...
Erik's user avatar
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1 vote
1 answer
454 views

Shear capacity according to eurocode , when to use which equation

I am looking at eurocode to calculate shear capacity, and under section "6.2.6 Shear", there are two different shear checks: Eq 6.18 Eq 6.19 When there is no torsion we can use equation 6....
greatoak763's user avatar
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1 answer
281 views

Why can't I-beam resist torsion but can resist shear stress due to transverse loading?

It is already known that the I-beam is very bending resistant (causes less deflection for the same transverse load and also results in lesser stresses relatively). But for an eccentric transverse load ...
Rameez Ul Haq's user avatar
0 votes
1 answer
688 views

Does F_x generates "Transverse Shear Stress" shear stress at the fixed end A?

Considering the applied forces $F_y=F_y=0$ and $F_x=400$ lbf, what type of stresses does $F_x$ produce? I understand that $F_x$ causes tensile and bending stress but not sure about the transverse ...
jigz's user avatar
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1 vote
2 answers
558 views

What is the difference between max shear stress at neutral axis in bending and max shear stress from Mohr's Circle?

The maximum shear stress which we get from the equation: $\frac{VQ}{It}$ (for instance, the maximum shear stress at the neutral axis for a rectangular beam cross section, fixed at one end and ...
Rameez Ul Haq's user avatar
0 votes
1 answer
2k views

Finding out the direction of the maximum shear stress in a 3d stress tensor

I came across a problem where I was asked to find out the direction of the maximum principal stress in a given stress tensor , with the help of eigen vectors I was able to construct an equation which ...
Sergeant Afanasiev's user avatar
9 votes
7 answers
45k views

Metric bolt shear strength for a layman

As a layman, how can I know the shear strength of a particular size bolt? For example, if I want to attach something to the internal wall of my van ( 1mm stainless steel ) using a rivnut and standard ...
Robert S. Barnes's user avatar
0 votes
2 answers
840 views

How does shear/viscous stress change in liquids as applied shear force is changed?

As per Newton's law of viscosity, the dynamic viscosity of a Newtonian fluid is constant (doesn't change with applied shear stress).Consider the Couette flow used to explain viscosity . Whenever we ...
Abhishek P G's user avatar
1 vote
1 answer
190 views

How to find the reaction at the pinned support A as shown in the picture? [closed]

Please help me solve the problem. I need to know the reactions at A for both the cases as shown. Please note that E is a roller, D is a pin support , B is an internal hinge and A for case 2 is a fixed ...
Share thy thought's user avatar
3 votes
2 answers
2k views

Difference between shear flow and shear stress

I have been given the following problem in one of my courses. To say that I'm struggling in the course would be an understatement... I'm just wondering what the difference between shear flow and ...
contract-society's user avatar
2 votes
1 answer
280 views

Is the calculated shear strain in a beam, engineering strain or tensorial strain?

Recently I came across a FEM code of a linear deformation beam element, and it made me wonder what is the correct relation between shear stress and shear strain in a beam element. In the beam element ...
Saeid's user avatar
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2 answers
867 views

Effect of multiple shear pins used in combination in a coupling

Does using multiple shear pins under a limiting torque case reduce the minimum required shear pin diameter for the coupling or is the complete load distributed over the shear pins regardless of the ...
mech_engineer_12R's user avatar
1 vote
1 answer
80 views

Calculating the diameter of screws that are on radius 160mm from axis of rotation. I need help - I don't know If I'm thinking in the right way

First of all, english is not my first language so if there are some mistakes I made - I'm sorry and I hope everything is understandable. The example I am trying to solve reads the following: The gear ...
Jakub Szurlej's user avatar
2 votes
2 answers
3k views

How do you calculate the shear force on the screws that connect a door to a jamb via hinges

I'm trying to calculate the shear forces on hinge screws or bolts. Here is a schematic of the door with the relevant values: First, I took a free body diagram of the door and its hinges. The ...
Ryan's user avatar
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1 answer
155 views

Determining max shear stress

So I understand that shear stress can be either in the the form of transverse or torsional or both at the same time. And normal stress is due to the moment or a force normal to the surface. My ...
user15588486's user avatar
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1 answer
31 views

Derivation of expression for strain in a beam that experiences transverse vibrations

I was watching this video (the link to the video is https://www.youtube.com/watch?v=AoxTyIJprg8&list=PLMXj6GKKnHI6Lftj7CXr9WusMkXi5s9yH&index=60) which is part of a course on mechanical ...
user402525's user avatar
1 vote
4 answers
6k views

Why does a beam in shear crack at 45 degrees?

Why does a beam in shear like in this picture crack at 45 degrees instead of vertically? This is called "Punching shear", and requires concrete reinforcement at an angle: Assuming that the ...
S. Rotos's user avatar
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1 vote
3 answers
2k views

Why does the upper wing skin fail in buckling and lower wing skin does not?

I am aware of the fact that the buckling is mainly caused in the regions of the specimen which are in compression. But the wing skin doesn't take any axial loads and is used to resist shear, atleast ...
Rameez Ul Haq's user avatar