I suggest you refer to an engineering text-book because there are so many variables in the calculation your question as put is not answerable.
You may increase the slab thickness and/or calculate the steel reinforcement required to withstand against the applied shear stress.
the average shear stress is 3/4 the maximum shear stress for a circular section
The forces are equal magnitude but opposite directions act tangent the surfaces of opposite ends of the object the shear stress as force "f" acting tangent to the surface,dived by the "area"{a} shear stress=f/a
Normal stress and shear stress
Robert Hooke in 1660 discovered the stress strain relation known as Hooke's law. The shear tress relation ( stress = rigidity modulus x shear strain) is a logical extension of Hooke's law,
The shear modulus of a material is calculated by dividing the shear stress by the shear strain. This can be represented by the equation: Shear Modulus Shear Stress / Shear Strain.
In materials science, the relationship between resolved shear stress and critical resolved shear stress is that the critical resolved shear stress is the minimum amount of shear stress needed to cause dislocation movement in a material. Resolved shear stress is the component of an applied stress that acts in the direction of dislocation movement. When the resolved shear stress exceeds the critical resolved shear stress, dislocations can move and deformation occurs in the material.
You may increase the slab thickness and/or calculate the steel reinforcement required to withstand against the applied shear stress.
Shear Stress divided by the Angle of Shear is equals to Shear Stress divided by Shear Strain which is also equals to a constant value known as the Shear Modulus. Shear Modulus is determined by the material of the object.
the average shear stress is 3/4 the maximum shear stress for a circular section
Shear force is a load (pounds, or newtons) in plane of the object which produces shear stress ( pounds per sq inch, or Pascals). Shear force is related to shear stress as STRESS = FORCE/AREA
In fluid mechanics, shear stress is the force per unit area applied parallel to the surface of a fluid, while shear rate is the rate at which adjacent layers of fluid move past each other. The relationship between shear stress and shear rate is described by Newton's law of viscosity, which states that shear stress is directly proportional to shear rate. This means that as the shear rate increases, the shear stress also increases proportionally.
The principle stress is a maximum tension stress in a body where shear stress is zero and it acts on the principle plane. If a body is under both tension and shear then the principle stress is higher than the initial tension stress. You can calculate this and find the principle plane angle using Mohr Circle analysis or equations.
Fluids do not sustain shear stress because they undergo continuous deformation under applied shear forces. Unlike solids that have a defined shape and can resist shear stress, fluids flow and deform when subjected to shear, resulting in no sustained shear stress. This behavior is a fundamental property of fluids known as viscosity.
The forces are equal magnitude but opposite directions act tangent the surfaces of opposite ends of the object the shear stress as force "f" acting tangent to the surface,dived by the "area"{a} shear stress=f/a
The wall shear stress equation is used to calculate the force per unit area exerted by a fluid flowing along a solid boundary. It is represented by the formula (du/dy), where is the wall shear stress, is the dynamic viscosity of the fluid, du/dy is the velocity gradient perpendicular to the boundary.
no