Tensile Strength Crevasse Limit Checker

Screen caller observed tensile stresses against explicit uncertain material strength range; below range does not imply crevasse-free ice, structural stability or safe travel.

Description

Stress screening against an uncertain strength range has three outcomes.

Stress screening against an uncertain strength range has three outcomes. Equality belongs to the uncertainty band rather than the above/below groups.^[1]

Enter finite tensile-stress list and ordered nonnegative strength bounds. Return three zero-based index lists; empty observations are allowed.

When to use Tensile Strength Crevasse Limit Checker

Use Tensile Strength Crevasse Limit Checker when you need to evaluate the supplied records under the calculation and evidence rules below. Below-range evidence does not certify crevasse-free ice, stability or travel safety.

Prepare the observed ice, snow, water or geometry measurements and explicit calibration parameters requested. Keep coordinates, datum, density and time units consistent.

How to use Tensile Strength Crevasse Limit Checker and understand its results

Prepare the observed ice, snow, water or geometry measurements and explicit calibration parameters requested. Keep coordinates, datum, density and time units consistent.
Enter measuredTensileStressesPa, callerTensileStrengthLowerPa, callerTensileStrengthUpperPa using the field table and calculation rules, then run the tool.
Read belowCallerStrengthRangeIndices, withinCallerUncertaintyRangeIndices, aboveCallerStrengthRangeIndices. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
measuredTensileStressesPa	Measured tensile stresses Pa	list of number	Required
callerTensileStrengthLowerPa	Caller tensile strength lower Pa	number	Required
callerTensileStrengthUpperPa	Caller tensile strength upper Pa	number	Required

Enter finite tensile-stress list and ordered nonnegative strength bounds. Return three zero-based index lists; empty observations are allowed.

below=stress<lower; uncertain=lower≤stress≤upper; above=stress>upper

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
belowCallerStrengthRangeIndices	Below caller strength range indices	list of number
withinCallerUncertaintyRangeIndices	Within caller uncertainty range indices	list of number
aboveCallerStrengthRangeIndices	Above caller strength range indices	list of number

json

{
  "input": {
    "measuredTensileStressesPa": [
      10,
      20
    ],
    "callerTensileStrengthLowerPa": 15,
    "callerTensileStrengthUpperPa": 25
  },
  "output": {
    "belowCallerStrengthRangeIndices": [
      0
    ],
    "withinCallerUncertaintyRangeIndices": [
      1
    ],
    "aboveCallerStrengthRangeIndices": []
  }
}

Limitations and assumptions

Below-range evidence does not certify crevasse-free ice, stability or travel safety.

Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Numeric lists are limited to 10,000 entries; string lists to 128 strings of at most 128 characters each. The rules above may impose smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use Enhancement Factor Soft Ice Calculator: Observed strain relative to an unenhanced model yields an apparent softening factor. Model errors can contribute to that factor. For a complementary task, use Transverse Strain Rate Calculator: Transverse normal strain is the gradient of transverse velocity along a cross-flow transect. Its sign distinguishes extension and compression.

References

Tensile Strength Crevasse Limit Checker — tool.io

Similar or alternative tools

Enhancement Factor Soft Ice Calculator
Observed strain relative to an unenhanced model yields an apparent softening factor. Model errors can contribute to that factor.
Transverse Strain Rate Calculator
Transverse normal strain is the gradient of transverse velocity along a cross-flow transect. Its sign distinguishes extension and compression.