Pancyprian Appl. Mech. Sci. III flashcards
Pancyprian Appl. Mech. Sci. III · Build recall with a focused review session.
25 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Free-body diagram
- A representation of a chosen body and its external forces and moments, used with the stated constraints to formulate equilibrium or motion equations.
- Section modulus
- A geometric quantity relating bending moment to extreme-fibre normal stress in the applicable elastic beam model, requiring consistent length and force units.
- Normal stress
- Force per relevant section area in the supplied axial model, distinct from strain and not sufficient alone for a complete structural design assessment.
- Elastic strain
- A dimensionless deformation measure within the specified elastic model, linked to stress by an applicable constitutive relationship under the stated conditions.
- Torque transmission
- Transfer of rotational moment through the specified components, whose ideal speed ratio must be distinguished from real losses and allowable loads.
- Effective cylinder area
- The relevant pressure-loaded area for the stated direction, with the rod area subtracted on the annular side of a double-acting cylinder.
- Meter-out control
- Flow restriction on an actuator’s exhaust path in a specified circuit, which is not by itself a universal safe holding device for an overrunning load.
- Pressure versus flow
- Pressure describes force intensity while flow describes volume rate; confusing them can give an incorrect explanation for actuator force or speed.
- Cavitation
- Formation and collapse of vapor cavities when local liquid pressure becomes unsuitable, distinct from simply drawing free air into a system.
- Load-control arrangement
- An engineered combination managing the specified load and failure conditions, which cannot be replaced by assuming any simple throttle safely holds a suspended mass.
- Work sign convention
- An explicit definition of whether positive work is done by or on the system, which must be used consistently in the chosen energy balance.
- Ideal-gas temperature
- Absolute temperature in kelvin used in the stated ideal-gas relationship, rather than inserting an arbitrary Celsius reading into a proportional gas equation.
- Specific heat capacity
- Energy required per unit mass per unit temperature change under the specified process conditions, distinct from a latent heat for phase change.
- Isothermal process
- A process at constant temperature, which gives unchanged internal energy for a fixed amount of the stated ideal gas but not necessarily zero work.
- Adiabatic process
- A process with no heat transfer across the defined boundary, which does not automatically mean constant temperature or absence of work.
- Live-zero signal
- A measurement range whose normal zero-value output is above zero electrical signal, allowing some abnormal observations to be distinguished without uniquely diagnosing their cause.
- Feedback error
- The signed difference between the stated reference and measured value, whose interpretation requires the actual loop convention and operating context.
- Sensor range
- The specified interval over which a sensor is intended to measure, distinct from its resolution, accuracy and allowed operating environment.
- PLC input state
- The value presented to the controller by its configured input channel, which may differ from a local process-gauge observation and requires appropriate diagnosis.
- Soft foot
- An unsuitable support condition in which a machine foot does not seat appropriately, potentially distorting the assembly when its fasteners are tightened.
- Measurement resolution
- The smallest distinguishable displayed or detected increment of an instrument, distinct from its accuracy and the uncertainty of the complete method.
- Tolerance interval
- The permitted range specified for a feature, which must be distinguished from its nominal value and assessed with a suitable measurement method.
- Flexible coupling
- A torque-transmitting connection with specified accommodation for limited relative movement, which does not eliminate appropriate support and alignment requirements.
- Bearing installation load path
- The path by which mounting force reaches the specified interference-fitted ring without imposing damaging assembly load through the rolling elements.
- Nominal dimension
- The reference feature size stated on a drawing, which does not by itself describe the permitted tolerance or prove actual part conformance.