Subloading Surface Model and Experimental Study of Coal Failure under Cyclic Loading

<div>Relation between <svg height="9.59912pt" id="M110" style="vertical-align:-3.63821pt" version="1.1" viewbox="-0.0498162 -5.96091 7.69399 9.59912" width="7.69399pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M565 434L556 448L482 423L322 189L287 373C280 410 261 448 236 448C207 448 161 415 110 338L131 317C160 355 181 374 193 374C204 374 208 366 217 330C230 279 247 185 259 116L50 -175C18 -223 29 -260 41 -278H51C97 -198 207 -33 270 57L313 -165C328 -235 349 -261 376 -261S445 -244 510 -150L487 -127C444 -178 423 -186 411 -186C402 -186 398 -177 387 -130C371 -62 349 39 332 135C390 217 524 392 565 434Z"></path></g></svg> and the elastic model damage.</div>

Advances in Materials Science and Engineering

fig8

Figure 8

Figure 8: Subloading Surface Model and Experimental Study of Coal Failure under Cyclic Loading 