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Fused Quartz Calculators
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Internal Pressure Stress Calculator
Determine Thickness
Internal Pressure
Radius
Thickness:
Determine Internal Pressure
Radius
Thickness
Pressure:
Reasonable care must be taken in handling and use to protect glass (quartz) surfaces from scratches, abrasions, pits or digs that can act as break sources. Glass under stress will fail due to a break source. Therefore, surface preparation of glass exposed to thermal or mechanical stress is critical. Alternately, defects that are smooth and exhibit a gentle surface change are less damaging. This calculator is based on accepted strength of material calculations for the geometry and conditions selected. It assumes good workmanship in the manufacture of components. The calculator should in no way be interpreted as a guarantee or a warranty of the quartz performance. It should be used along with prudent testing of designs.
This calculator can be used to determine the required wall thickness or the allowable internal pressure for a fabricated pressure vessel at low temperatures.
This calculator uses the thin wall approximation that is applicable when the wall thickness is less than about one
The calculator uses the relationship between the radius, thickness, and the applied internal pressure to determine the tangential (hoop) stress. The longitudinal stress is half of the tangential stress, so it is not calculated. These relationships only apply to sections of the pressure vessel significantly distant from the ends, since various nonlinearities and stress concentrations exist near these ends.
This calculator only considers internal pressure. Pressure vessels under external pressures must be analyzed for buckling and other modes of failure.
This calculator can be used to determine the required wall thickness or the allowable internal pressure for a fabricated pressure vessel at low temperatures.
This calculator uses the thin wall approximation that is applicable when the wall thickness is less than about one
The calculator uses the relationship between the radius, thickness, and the applied internal pressure to determine the tangential (hoop) stress. The longitudinal stress is half of the tangential stress, so it is not calculated. These relationships only apply to sections of the pressure vessel significantly distant from the ends, since various nonlinearities and stress concentrations exist near these ends.
This calculator only considers internal pressure. Pressure vessels under external pressures must be analyzed for buckling and other modes of failure.
Material Comparator
Unit Of Measurement
Material selection in the design of fabricated-ware components is an important factor in achieving desired results. This calculator allows the user to quickly compare two materials for a specified property type.
Sag Deflection Calculator
Load Type
Load
Length
Rod Diameter
Beam Height
Beam Width
Outer Diameter
Inner Diameter
Hydroxyl Level
Application Temperature
1000 <= Temperature <= 1400
Cumulative Time at Temperature
Deflection:
Max Stress:
Stress Max Design Stress:
Deflection:
Max Stress:
Stress Max Design Stress:
Sag Elastic Deflection:
Sag (cm):
Experimental Sag/Elastic Deflection:
Experimental Sag (cm):
Deflection:
Max Stress:
Stress Max Design Stress:
Sag Elastic Deflection:
Sag (cm):
There are many factors in quartz component design and use conditions that can significantly impact the amount of sag in a quartz part. This calculator is a useful tool to compare the relative performance of different shapes, sizes and material types. The predicted sag may be different than actual experience, but it has proven to be a valid tool for comparison of different design features such as rod diameter and different materials (low hydroxyl quartz vs. high hydroxyl quartz).
This calculator can be used to estimate the amount of sag (deflection) in a horizontally supported quartz element.
Abstract:
Room temperature elastic deflection of quartz structures can be used to predict the sag in the structure at high temperature.
The difference between elastic and plastic deflection is compared and used to show that for many structures viscous sag is proportional to elastic deformation.
Reasonable care must be taken in handling and use to protect glass (quartz) surfaces from scratches, abrasions, pits or digs that can act as break sources. Glass under stress will fail due to a break source. Therefore, surface preparation of glass exposed to thermal or mechanical stress is critical. Alternately, defects that are smooth and exhibit a gentle surface change are less damaging. This calculator is based on accepted strength of material calculations for the geometry and conditions selected. It assumes good workmanship in the manufacture of components. The calculator should in no way be interpreted as a guarantee or a warranty of the quartz performance. It should be used along with prudent testing of designs.
This calculator can be used to estimate the amount of sag (deflection) in a horizontally supported quartz element.
Abstract:
Room temperature elastic deflection of quartz structures can be used to predict the sag in the structure at high temperature.
The difference between elastic and plastic deflection is compared and used to show that for many structures viscous sag is proportional to elastic deformation.
Reasonable care must be taken in handling and use to protect glass (quartz) surfaces from scratches, abrasions, pits or digs that can act as break sources. Glass under stress will fail due to a break source. Therefore, surface preparation of glass exposed to thermal or mechanical stress is critical. Alternately, defects that are smooth and exhibit a gentle surface change are less damaging. This calculator is based on accepted strength of material calculations for the geometry and conditions selected. It assumes good workmanship in the manufacture of components. The calculator should in no way be interpreted as a guarantee or a warranty of the quartz performance. It should be used along with prudent testing of designs.
Window Thickness Calculator
Unsupported Diameter
Pressure
Thickness:
Minimum Thickness required to keep stress in Quartz below 1,000 psi, the suggested design stress
The results of the calculations above assume good workmanship in preparation of the glass (quartz) window. Reasonable care must be taken in handling and use to protect glass (quartz) surfaces from scratches, abrasions, pits or digs that can act as break sources. Glass under stress will fail due to a break source. Therefore, surface preparation of glass exposed to thermal or mechanical stress is critical. Alternately, defects that are smooth and exhibit a gentle surface change are less damaging. This calculator is based on accepted strength of material calculations for the geometry and conditions selected. The calculator should in no way be interpreted as a guarantee or a warranty of the quartz performance. It should be used along with prudent testing of designs. A uniformly distributed load is assumed in the calculations
The results of the calculations above assume good workmanship in preparation of the glass (quartz) window. Reasonable care must be taken in handling and use to protect glass (quartz) surfaces from scratches, abrasions, pits or digs that can act as break sources. Glass under stress will fail due to a break source. Therefore, surface preparation of glass exposed to thermal or mechanical stress is critical. Alternately, defects that are smooth and exhibit a gentle surface change are less damaging. This calculator is based on accepted strength of material calculations for the geometry and conditions selected. The calculator should in no way be interpreted as a guarantee or a warranty of the quartz performance. It should be used along with prudent testing of designs. A uniformly distributed load is assumed in the calculations
*The marks followed by an asterisk (*) are trademarks of Momentive Performance Materials Inc.
