DOI: 10.16904/envidat.365
title: Time series data on dynamic crack propagation in long propagation saw tests

description: This data set includes material and results described in the related research article:
Bergfeld, B., van Herwijnen A., Bobillier, G., Rosendahl P., Weißgraeber P., Adam V., Dual, J., and Schweizer, J.: Temporal evolution of crack propagation characteristics in a weak snowpack layer: conditions of crack arrest and
sustained propagation, Natural Hazards and Earth System Sciences, 23, 293-315, https://doi.org/10.5194/nhess-23-293-2023, 2023.
We performed a series of propagation saw test experiments, up to ten meters long, over a period of 10 weeks and analyzed these using digital image correlation techniques. We derived the elastic modulus of the slab, the elastic modulus of the weak layer and the specific fracture energy of the weak layer with a homogeneous and a layered slab model. During crack propagation, we measured crack speed, touchdown distance and the energy dissipation due to compaction and dynamic fracture. Our data set provides unique insight and valuable data to validate models.
description: Resource Title: Snowpack data and crack propagation characteristics
 Size: 17198 bytes
 Format: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
 URL: https://www.envidat.ch/dataset/24afd6a9-cb86-4a5b-b70b-aec194608c81/resource/8a1d6373-3447-4c43-b483-6383d3fee307/download/experimental_data.xlsx
 Description: Snowpack data includes the elastic modulus (stiffness properties) of the slab, the elastic modulus of the weak layer, and the specific fracture energy of the weak layer determined with a homogeneous and a layered slab model. During crack propagation, we measured the crack speed, touchdown distance, crack arrest length and energy dissipation due to compaction and dynamic fracture.
description: Resource Title: Videos of crack propagation
 Size: 3605500859 bytes
 Format: application/x-zip-compressed
 URL: https://www.envidat.ch/dataset/24afd6a9-cb86-4a5b-b70b-aec194608c81/resource/1081573c-53f5-4f3c-8630-b2f944320e73/download/crack_propagation_videos.zip
 Description: The videos show the cracking process in the Propagation Saw Tests (flat field). The upper panel shows strain on top of the recorded movie frames. The second row shows vertical (w, blue line) and horizontal (u, orange line) displacement fields. The third and fourth row show the first and second time derivatives, namely the velocity and acceleration field.
description: Resource Title: Sustained crack propagation index
 Size: 52686 bytes
 Format: application/x-zip-compressed
 URL: https://www.envidat.ch/dataset/24afd6a9-cb86-4a5b-b70b-aec194608c81/resource/9c7ff498-88f0-4724-8d49-9f5ea1557bc4/download/ssp.zip
 Description: Index of self-sustained crack propagation SSP (ssp_measured.xlsx) with time. The self-sustained crack propagation index SSP was also modelled for simulated snow stratigraphy (ssp_modelled.xlsx) using crack speed and critical cut length parameterizations from Heierli (2005) and Richter et al. (2019), respectively.
description: Resource Title: SNOWPACK modelling
 Size: 4563357 bytes
 Format: application/x-zip-compressed
 URL: https://www.envidat.ch/dataset/24afd6a9-cb86-4a5b-b70b-aec194608c81/resource/79d1ace4-f5e6-4f7f-a732-3d282b8306fa/download/snowpack.zip
 Description: The snow cover model SNOWPACK (version 3.60) was used to simulate the evolving snow stratigraphy at our field site. The model was driven with data from an automatic weather station which was located 100m next to the field site (FLS_bunker_snowpack.smet). The SNOWPACK initiation file (FLS_bunker_snowpack.ini) contains the selected model parameters that result in the modeled snow stratigraphy (FLS_bunker_snowpack.pro).