Table 8 3.6 Classification of crack risk level

From: Crack propagation risk threshold of classical garden rockeries based on LEFM

Risk level	Frame time (s)	R	Displacement (mm)	Crack volume (m³)	Crack area (m²)
Ⅰ	0.00001	0.002	−0.0012	0	0.533
	0.00002	0.004	−0.0024	0	0.533
	0.00004	0.007	−0.0042	0	0.533
	0.00006	0.011	−0.0069	0	0.533
	0.00009	0.018	−0.01095	0	0.533
	0.00014	0.028	−0.017025	0.000001	0.533
	0.00022	0.043	−0.026138	0.000001	0.533
	0.00033	0.066	−0.039806	0.000002	0.533
	0.0005	0.099	−0.060309	0.000003	0.533
	0.00076	0.15	−0.08925	0.000004	0.533
	0.00114	0.226	−0.131955	0.000006	0.533
	0.00172	0.34	−0.203153	0.000011	0.533
	0.00259	0.511	−0.30476	0.000026	0.573
	0.00359	0.709	−0.425541	0.000055	0.808
	0.00459	0.907	−0.551409	0.000157	1.571
Ⅱ	0.00559	1.105	−0.675731	0.000194	1.571
	0.00659	1.303	−0.785845	0.00033	1.848
	0.00759	1.501	−0.905718	0.000418	2.021
	0.00859	1.698	−1.02196	0.000487	2.092
	0.00959	1.896	−1.15148	0.000565	2.131
	0.01058	2.094	−1.27081	0.00068	2.136
Ⅲ	0.0109	2.292	−1.32986	0.000773	2.222
	0.0175	3.479	−2.13681	0.001244	2.241
	0.0198	3.874	−2.41901	0.001394	2.256
	0.02	4.072	−2.45221	0.001413	2.256
	0.0305	6.051	−3.72795	0.002146	2.256
	0.0405	8.029	−4.95214	0.002852	2.256
	0.0505	10.007	−6.17632	0.003557	2.256
	0.0605	11.985	−7.40051	0.004262	2.256
	0.0705	13.964	−8.6247	0.004968	2.256
	0.0805	15.942	−9.84889	0.005673	2.256
	0.0905	17.921	−11.0731	0.006379	2.256
	0.1	19.701	−12.2973	0.007085	2.256
	0.2	39.484	−24.8	0.014117	2.256
	0.3	59.267	−36.7995	0.021173	2.256
	0.4	79.047	−49.044	0.028242	2.256
	0.5	98.833	−61.2887	0.035321	2.256
	0.6	118.613	−73.5334	0.042412	2.256
	0.7	138.4	−85.7781	0.049514	2.256
	0.8	158.18	−98.0228	0.056627	2.256
	0.9	177.967	−110.267	0.063752	2.256
	1	197.827	−122.445	0.070849	2.256

The bold values identifies rows corresponding to the transition from risk level I to II, from II to III, the calculation end point, and the point where the crack area remains unchanged.

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